第一篇：九年級(jí)長(zhǎng)江寒假作業(yè)英語答案

九年級(jí)長(zhǎng)江寒假作業(yè)英語答案

聽對(duì)話或獨(dú)白，根據(jù)對(duì)話或獨(dú)白的內(nèi)容，從下面各題所給的A、B、C三個(gè)選項(xiàng)中選擇最佳選項(xiàng)。每段對(duì)話或獨(dú)白讀兩遍。（共12分，每小題1分）請(qǐng)聽一段對(duì)話，完成第5至第6小題。5.Where does the woman want to go? A.The library.B.The post office.C.The City Bank.6.What should the woman do at the traffic lights? A.Turn right.B.Tum left.C．Go forward.請(qǐng)聽一段對(duì)話，完成第7至第8小題。7.Why did the woman take pictures of her flat? A.To put them in her living room.B．To show them to her friends． C.To send them to her parents.8.Which room does the woman like best?

A.The study.B.The living room.C.The、bedroom.請(qǐng)聽一段對(duì)話，完成第9至第10小題。9.When does the man go to the gym every day? A.After breakfast.B.After lunch.C.After dinner.10.What's the man's job? A.A reporter.B.An actor.C.A doctor.請(qǐng)聽一段對(duì)話，完成第11至第13小 題。11.Why is the man asking for hot water? A.He is thirsty.B.His feet hurt.C.He feels cold.12.How well did the man do in the race?

A．He was in the middle.B.He was one of the fastest.C.He was one of the slowest.13.What can you learn from the conversation? The man enjoys running.B.The man wants to win the race.C.The woman will run with the man.請(qǐng)聽一段對(duì)話，完成第14至第16小題。14.What's the speaker mainly talking about? A.His students.B.His job.C.His trouble.15.What do the students usually do duringthe lesson? A.Mark their coursework.B.Do experiments.C.Answer questions.16.What does the speaker think of his way of teaching? A.It bores the students.B.It saves time C.It works.三、聽對(duì)話，根據(jù)所聽到的對(duì)話內(nèi)容和提示詞語，記錄關(guān)鍵信息。對(duì)話讀兩遍。（共10分，每小題2分）Healthy Dentistry To: Dr.Lee

Patient’s name: Bill __17__

Last check-up: __18__ ago

Check-up time: __19__, July 4 7:30 in the __20__

Room number: __21__

知識(shí)運(yùn)用（共25分）

四、單項(xiàng)填空。（共13分，每小題1分）

從下面各題所給的A、B、C、D四個(gè)選項(xiàng)中，選擇可以填入空白處的最佳選項(xiàng)。22.The lovely girl is from Class6.____ name is Alice.A.Her

B.His

C.Your

D.Its 23.—Is your father home? —No，he’s working late ____ the office.A.on

B.at

C.of

D.to 24.There were only two paintings for sale and he bought ____.A.all

B.any

C.both

D.some 25.Let’s ____ for a walk, shall we?

A.to go

B.going

C.go

D.gone 26.—Where were you last Saturday? —I ____ in the Capital Museum.A.am

B.will be

C.was

D.have been 27.—Mum, must I wash the dishes right now? —No, you ____.A.shouldn’t B.wouldn’t

C.mustn’t

D.needn’t 28.I work hard this term, but Peter works much ____.A.hard

B.harder

C.hardest

D.the hardest 29.—May I speak to the headmaster? —He ____ a meeting now.Can I take a message? A.is having B.had

C.has

D.will have 30.There are no buses, ____ you’ll have to walk.A.so

B.or

C.but

D.for 31.— ____ is the dictionary? —It’s $22.95

A.How old B.How long

C.How thick D.How much 32.I ____ Mr.Smith since he moved to Shanghai.A.didn’t hear from

B.don’t hear from C.won’t hear from

D.haven’t heard from

33.Today, computers are really helpful.They ____ everywhere.A.use

B.are used

C.used

D.were used 34.—Can you tell me ____ the prize, Tom? —Last year。

A.when you got

B.when did you get C.when will you get

D.when you will get

五、完形填空。（共12分，每小題1分）

閱讀下面的短文，掌握其大意，然后從短文后各題所給的A、B、C、D 四個(gè)選項(xiàng)中，選擇最佳選項(xiàng)。

Several weeks ago, our headmaster, Mr.Gaudi, told usthat our school had been chosen to compete on Smart Aleck—a game show which my best friend Carla and I both love.Carla has a good imagination, and I know a lot of history, so we thought we’d be good __35__ for the team.A few days later, Mr.Gaudi held a meeting with everyone interested in the__36__.He told us that Smart Aleck uses a five member team.He also said that three more people would be needed as backup（替補(bǔ)）.Unluckily four times that many students were at the meeting.So Mr.Gaudi said we would have a __37__ and the top eight scorers would become the team and the backup.Everybody agreed that this was a __38__ way to decide.Yesterday, all of the hopefuls went to the dining hall after school.We would have to decide the starting line-up（陣容）.Mr.Gaudi acted as the host.After a couple of hours, all the __39__ on the team were set except one.Carla and I __40__ for that last position.We had to hold a one-on-one competition between the two of us.The winner would be on the team and the loser would be the backup.Midway through our two-person competition,I was starting to pull ahead.__41__ I saw the look on Carla's face.I waited for a second and knew what I had to do.As much as I wanted to be on Smart Aleck,Carla wanted __42__ even more.So,starting with my next question,I held back and le t Carla __43__,just by a little bit.Her expression as she __44__ she would be on the show made up for my not being on the team.And since I will go as backup,I'll still have the fun of seeing the show up close.Was I __45__ by not trying as hard as I could?I don't think so.No one noticed,and Carla and I didn't __46__ it.It won't hurt the team because Carla will be a very good competitor on the real show.I think that making my best friend happy was the right thing to do.35.A.choices B.pairs C.leaders

D.fans 36.A.course B.work C.trip

D.show 37.A.direction B.discussion C.competition D.conversation 38.A.special B.hard

C.fair

D.funny 39.A.places B.rules C.names

D.orders 40.A.tied

B.clapped C.cried

D.returned 41.A.Still

B.Never C.Then

D.Again 42.A.us

B.it

C.me

D.her[來新 課標(biāo) 第一 網(wǎng) 43.A.wait

B.turn

C.move

D.win 44.A.accepted B.realized C.considered D.decided 45.A.coming

B.refusing C.helping

D.cheating 46.A.mean B.plan

C.regret

D.say 閱讀理解（共44分）

六、閱讀下列短文，根據(jù)短文內(nèi)容，從短文后各題所給的A、B、C、D四個(gè)選項(xiàng)中，選擇最佳選項(xiàng)。（共26分，每小題2分）A Join Us for a Day at Sun Valley Amusement Park Children aged 10 to 14 are invited to take part in the “Event of the Summer” at Sun Valley Amusement Park, the most popular amusement park on the East Coast.Sun Valley has more than 80 amusement rides.For sports lovers, there are basketball courts, an indoor baseball field, and climbing walls.No amusement park would be complete without a gift shop.Sun Valley has two.You won’t want to miss out on this day of fun.Join us at Sun Valley Amusement Park on July 14 Register（登記）early.? The cost of the trip is $25.This includes tickets and all rides.? We suggest that all children bring lunch.? Buses leave at 9:00 AM and return at 5:00 PM.? Rain Date: Wednesday, July 16.Register at the Children’s RecreationCenter at the Town Hall by July 3.A one-day registratio n will also be held on July 1 at the Brown School.For more information, call Jane Parks at 555-7267

47.Who can take part in the “Event of the Summer”? A.Children under 5

B.Children over 16 C.Children aged 10-14

D.Children aged 5-9 48.The children had better bring ____ A.a basketball

B.lunch

C.a gift

D.gloves 49.When can children register at the Brown School? A.On July 1

B.On July 3 C.On July 14 D.On July 16 B Street Ping Pong— Ping!Do you like table tennis? If you had travelled to cities in the UK like London or Birmingham last summer, you might have seen one of the dozens of free tablesthat were there as part of a project（項(xiàng)目）called Ping!.What is Ping!?[ xk b 1.c o m] Ping！is a three-year table tennis project.It has been running since 2010 and this year, 2012, is the final year.The idea is to put free table tennis tables in eight different towns in the UK for four weeks during the summer.Each table comes with its own bats and balls and is free to play.You can find the tables outdoors.What does Ping!hope to achieve? It would be great if Ping！helped find a new Olympic table tennis star but what Ping!really hopes.to achieve is just to get people playing and having fun together.“Putting a ping pong table on the street gives people a chance to connect with other people,” said MeeraSodha, Ping!Project Manager.One of the towns that took part in the project was Hull, a city in England.Forty-five tables were put into the city.JakobAdamski, an ESOL student learning.English, said, “I really enjoyed playing table tennis in the park.It was alsoagood way for me to practise my English and meet people.” 50 When did the Ping!project start? A.Last summer.B.Last winter.C.In 2010.D.In 2012.51.What's the Ping!project?

A.Choosing table tennis stars.B.Holding table tennis matches.C.Teaching people how to.play table tennis.D.Putting free table tennis tables in some towns.52.The purpose of the Ping!project is

A.to help people practise English B.to invite people to visit the UK cities

C.to get people to play and have fun together.D.to encourage people to take part in the 2012 0lympics C The right name is important in the business world.All you have to do is think of the names for some of the products you buy every day and you’ll agree that the name and the product are connected in the everyone’s mind.In many countries, successful trade or brand names are protected by law.This is so that other companies cannot make a product and, in fact, be buying something different.Businesses register a company or a product name with the government.In fact, more than 1,000 product and company names are registered every hour.Many companies spend a lot of money to find the right name for their products.A good example of this is.In the car industry.Some successful names for cars have powerful associations（聯(lián)系）.The Ford Mustang and the Jaguar are only two examples of choosing the names of animals that are fast and strong.When a U.S company decides to sell its product in another country, it has to make sure that the product name translates properly.When Coca-Cola introduced its soft drink to China, it looked for the right name.It wanted a name that would do two things.One was to present its image（形象）in Chinese and the second was to be close to its first brand name—Coke.It took some efforts before finding the right word —which sounds similar and translates as “happiness in the mouth”.Asian company names are not new to the United States.The brand names of Samsung and Sony have been successful.Finding the right brand name is a big business.Asian companies that sell to foreign markets pay to find a name that will connect with its customers.There are even naming companies that specialize in inventing product names.These companies can charge（要價(jià)）up to $100,000 a word for their creations.But it’s worth it.Successful companies know how important the right brand names are for their development.53.Why are trade names protected by law in many countries? A.To make companies pay for naming service.B.To help people choose the best products C.To present good images of the products.D.To prevent good images from being copied 54.What can we learn from the passage? A.Many companies care about the cost of finding the right names B.Creative trade names can help companies to have a larger sale C.The government often does business with naming companies D.It is considered necessary for cars to be names after animals 55.What’s the best title for the passage? A.The Business of Names B.The Development of Names C.The Rules of Naming Business D.The Methods of Choosing Names D Reading Oliver James'Affluenza,I thought about what often happens at home.My 12-year-ole daughter is in tears.“I have so take a test tomorrow.I don't understand any of it,”she cries out.After shouting and shutting her door,she calms down enough to go through her notes.The following dry I ask her how the test went and the just says“OK,I got a nine”.“Wow.well done!”I s ay,before she finishes with “But I never get a ten!” According to James,this obsession with getting top marks has been a bad development,which encourages people to think of education in terms of work and money.To test this,I asked my daughter why she was so worried about her tests.She looked at me as if I was thick.“Well,if I don't get good grades,I won't be able to afford nice things like a car and stuff.” I was quite surprised,because I don't consider myself a pushy parent.But James suggests and it leaves students feeling failures even if they are very bright.He points to the Danish system（體制）of education as a better model.Creating happy citizens who have good social skills is seen as more important than high achievements at school or the needs of business.For me,I cannot remember the last time I had to work out the area of a circle,recite a Shakespeare poem or grammar rules,yet I have lived a happy life.What I really needed to learn at school was how to make polite conversations,or how to avoid getting into debt or how to develop good personality.This is in fact similar to what Oliver James really has in mind.And he is looking for schools where students are encouraged to find and follow their own interests,something more like Tongjon.Tongjon has been developed in some Korean private schools.It is quite different from the more rigid system of learning things by heart that is used in Korea,and indeed in many other school systems around the world.As the Russian poet Pushkin said,“Inspiration(靈感）is needed in geometry(幾何學(xué)）just as much as in poetry ”,and inspiration does not come from endlessly revising for tests or getting worried about them.56.What does the writer probably think of his/her daughter? A.She sets herself a goal too high to reach.B.She should be more polite to her parents.C.Sheis hard-working but not very bright.D.She takes her grades much too seriously.57.What does the word “obsession”in paragraph 3 mean? A.A plain and unavoidable fact.B.A satisfied and very prou d state.C.A practical and widely-used way.D.A fixed and often unreasonable idea.58.What can we infer from the passage?

A.Social skills are as important as high grades.B.Interest in grades can shake self-confidence.C.The writer regrets not having studied hard at school.D.Danish educational system is for very smart students.59.The writer wants to tell us that____.A.learning happily is the key to self-development.B.top marks may be helpful to increase one's interest.C.tests should be improved to give children inspiration.D.education should meet one's needs for word and money.七、閱讀短文，根據(jù)短文內(nèi)容，從短文后的五個(gè)選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有一項(xiàng)為多余選項(xiàng)。（共8分，每小題2分）

Dr.Jack Todd is very interested in clean water.____,so it's natural that he is to developer of a small and affordable system(系統(tǒng)）to clean wastewater,His “Living Machine" can clean wastewater in your home or in your business.__61__ The wastewater goes into a big plastic tank where bacteria(細(xì)菌）start to break down the waste.A few days later after it is dealt with, the water is brought into a greenhouse filled with plants and fish.With the help of sunlight,the plants and animals remove more chemicals from the water,making it cleaner,Then the water can be reused for washing or bathing __62__ but the water is clean enough for watering the flowing, washing the dog, or even for bathing or swimming.The advantage of this technology is that it is affordable and good for the environment.__63__.It can help to use less fresh water, and it can help keep the water supply unpolluted.A.If enough homes and businesses use “Living Machines” B.People like to plant trees around their houses C.He is also interested in saving money D.It cannot be used for drinking or cooking E.The “Living Machine” is a system for cleaning wastewater

八、閱讀短文，根據(jù)短文內(nèi)容回答問題。（共10分，每小題2分）

Every year, wildfires(野火)destroy much forest land.homes are broken down, and thousands of people die.smokejumpers are stop help ing to stop this.Smokejumpers are a special kind of firefight.they jump from places into areas that difficult to reach by car or on foot.they race to put out fires as fast as they can.At a fire site, Smokejumpers first examine the land and decide how to fight the fire.their main goal is to stop fire from spreading.using basic tools such as shovels and axes, smokejumpers clear land of burnable material like plants and other dry material.they carry water with them too, but not much.Although most smokejumpers are men, more women are joining.M ost important are your weight and height.Smokejumpers in the U.S.for example ,must be 54 to 91 kilograms, so they don’t get hurt when they land, or get blown by strong winds.Smokejumpers must be able to live in the wild erness.in Russia ,many smokejumpers know how to find food in the forest and even make simple furniture from trees.They work is dangerous, the hours are lo ng.But for these firefighters, smokejumpers isn’t just a job.They love being able to jump out of planes, fight fires, and live in the forest.As 28-year-old Russian smokejumpers Alexi Tishin says,“This is the best job for the strong and brave.” 64.What are Smokejumpers? 65.Where do the jump from? 66.What’s their main goal?

67.Why should they have proper weight? 68.What’s needed to be a smokejumpers? 書面表達(dá)（共25分）

九、完成句子。（共10分，每小題2分）根據(jù)中文意思完成句子。69.很抱歉我沒能參加你的生日晚會(huì)。_____for missing your birthday party.70.你在課余時(shí)間喜歡讀書嗎？ Do you _____ in your spare time? 71.杰克會(huì)和同學(xué)們相處得很好。Jack will _____ his classmates.72.這個(gè)演講非常精彩。我們都聽得很認(rèn)真。The speech _____ we all listened carefully.73.他們很難在這么短的時(shí)間內(nèi)想出新的辦法。_____ a new way in such a short time.十、文段表達(dá)。（共15分）

根據(jù)中文和英文提示詞語，寫出意思連貫、符合邏輯、不少于60詞的短文，所給英文提示詞語僅供選用，請(qǐng)不要寫出你的真實(shí)校名和姓名。

74.生活中每個(gè)人都有過與他人分享的體驗(yàn)，如分享一本有趣的書、一段難忘的經(jīng)歷、一個(gè)閃光的想法??

現(xiàn)在，某英文報(bào)紙就分享（Sharing）話題征文，請(qǐng)你投稿。描述一次你與他人分享的經(jīng)歷，并談?wù)勀愕母惺堋?/p>

提示詞語：share?with?;experience;interest;learn;change;encourage;enjoy;happiness;confident

參考答案

一、聽對(duì)話，選圖

1、C2、B3、A4、C

二、聽對(duì)話或獨(dú)白，選答案

5、A6、B7、C8、A9、A10、B11、B12、C

13、A14、B15、C16、C

三、聽對(duì)話，記錄關(guān)鍵信息

17、Appleman 18.four months

19.Monday 20.evening 21.315

四、22、A23、B24、C25、C26、C27、D28、B29、A

30、A

31、D32、D33、B34、A

五、35、A36、D37、C38、C39、A40、A41、C42、B43、D

44、B45、D46、B 閱讀理解

六、47、C48、B49、A50、C51、D52、C53、D54、B55、A

56、D57、D58、B59、A

七、60、C61、E62、D63、A

八、64、Smokejumpers are a special kind of firefighter.65.They jump from planes.66.Their main goal is to stop a fine from spreading.67.Because they won’t get hurt when they land ,or get blown by strong winds.68.To be a smokejumper,one needs to have proper height and weight, be able to live in the wilderness and love his/her job.書面表達(dá)

九、69.I am sorry 70.like reading 71.get along/on well with 72.was so wonderful that 73.It’s difficult for them to come up with

十、文段表達(dá)

74.One possible version

I had an experience of sharing.When my family moved, I had to go to a new school and study in a new class.The first test made me so nervous that I failed.I got worried and felt helpless until one of my new classmates came up t o me and asked softly if I was OK.After I told him about my problem, he gave me some advice.From then on, we got to know each other and shared our ideas ,problems, and happiness.We became good friends.Sharing with friends helped me bring back my confidence and fit in with others.

第二篇：九年級(jí)英語長(zhǎng)江寒假作業(yè)答案

九年級(jí)英語長(zhǎng)江寒假作業(yè)答案

第一部分聽力（30分）

I.聽句子,從A、B、C三個(gè)選項(xiàng)中，選擇最佳應(yīng)答語,并在答題卡上將該項(xiàng) 涂黑。每個(gè)句子聽兩遍。（每小題1分,共5分）

1.A.Fine, thanks.B.See you.C.Good morning.2.A.On Sunday.B.At 8 ：00 a.m.C.In July, 1989.3.A.Yes, I am.B.Yes, I can.C.Yes, please.4.A.It’s a T-shirt.B.It's a white T-shirt.C.It's his T-shirt.5.A.He is forty.B.He is a doctor.C.He is in black pants.II.聽5段短對(duì)話。從A、B、C三個(gè)選項(xiàng)中，選擇最佳答案,并在答題卡上將 該項(xiàng)涂黑。每段對(duì)話聽兩遍。{每小題1分，共5分）

6.What does the man usually do on Sundays? A.He usually plays computer games.B.He usually plays basketball.C.He usually plays football.7.What are they talking about? A.People.B.Cars.C.Traffic accidents.8.What’s the date today?

A.It’s March 17th.B.It’s March 18th.C.It's March 19th.9.Could the boy swim one year ago? A.Yes, he could.B.No, he c ouldn't.C.No, he can’t.10.What’s the woman’s favorite Chinese festival?

A.The Lantern Festival.B.The Spring Festival.C.The Mid-autumn Festival.III.聽1段長(zhǎng)對(duì)話，從A、B、C三個(gè)選項(xiàng)中，選擇最佳答案，并在答題卡上將 該項(xiàng)涂黑。對(duì)話聽三遍。（每小題2分,共10分）。004km.cn 11.Does Kate like watching TV? A.No, she hates it.B.No, she doesn’t.C.Yes, she d oes.12.How many hours does Kate watch TV every day? A.About four.B.Over five.C.About three.13.Which TV program does Kate like best? A.Movies on TV.B.News reports.C.TV plays.149.How often does Kate watch movies on TV till midnight? A.Every day.B.Sometimes.C.Always.15.What is Jack’s advice?

A.Kate should have enough rest.B.Kate should watch TV for a long time.C.Watching TV is good for Kate’s health.IV.聽短文,從A、B、C三個(gè)選項(xiàng)中，選擇最佳答案，并在答題卡上將該項(xiàng)涂 黑。短文聽三遍。（每小題2分，共10分）

16.I am going to ______ every morning during the winter holidays.A.watch TV

B.join a guitar club

C.read English 17.In the evening of the holidays, I’ll watch TV ______.A.for the whole holidays B.for only one hour

C.for one night 18.I will join a ______ club.A.guitar

B.dance

C.music 19.I will ______ on time in my winter holidays.A.read English

B.watch TV

C.go to bed and get up 20.I’m sure I will ______ from the travelling.A.play the guitar betterB.learn English better C.have a good time and learn a lot 第二部分單項(xiàng)選擇（10分）

從下列各題所給的A、B、C、D四個(gè)選項(xiàng)中，選擇能填入空白處的最佳選 項(xiàng),并在答題卡上將該項(xiàng)涂黑。（每小題1分,共10分）21.Pl ease give ______ English book to her.A.me

B.I

C.mine

D.my 22.—Could you please pass me something to eat? —What about some ______? A.water

B.orange

C.fish

D.tea 23.Her mother goes to work ______ bus every morning.A.by

B.at

C.on

D.in 24.—Who’s that girl?

—You mean ______ one with long blond hair? That's Jack’s daughter.A.a

B.an

C.the

D.不填 25.Lucy ______ a student last year, but now she ______ a teacher.A.is;is

B.was； is

C.was； will be

D.is； was 26.—Were you at home at 9:00 last night? I called you but nobody answered.—Sorry，I ______ at that time.A.take a shower

B.took a shower C.was taking a shower D.am taking a shower 27.—Mum, I can't find my shoes.—Hurry up!Your father ______ for us.A.is waiting

B.waited

C.waits

D.will wait 28.—I have ______ in learning English and I’m so worried.Could you help me with it? —Sure, I’d love to.A.joy

B.interest

C.trouble

D.fun 29.—I’ve never had such a wonderful time.Tha nk you for inviting me.— ______.A.That’s right.B.You're welcome.C.That’s it.D.Good job.30.When winter comes, days get ______.A.long and long B.short and short

C.longer and longer D.shorter and shorter 第三部分

完型填空（10分）

閱讀短文,從短文后各題所給的A、B、C、D四個(gè)選項(xiàng)中，選擇能填入空白處 的最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。（每小題1分，共10分）

Last week our school held a sports meeting.Everyone in our class felt very 31 because we were the winners.In the boys’ relay race, Michael 32__ very fast and our class won the first place.Yu Ting is good 33 the long jump and she 34 won.We，re sorry that we 35 in the high jump, but we’re sure we 36 do better next time.I took part in the boys，37 race.I did my best and was the first 38 the finish Line.TTKis encourages 39 _ a lot.Now I love sports better.I want to be a soccer player.I will take more exercise every day and I hope some day I 40 able to take part in the Olympic Games.31.A.worried B.surprised

C.excited D.frightened 32.A.runs

B.ran

C.run

D.is running 33.A.for

B.in

C.to

D.at 34.A.also

B.too

C.either

D.as well 35.A.do badly B.did badly

C.do well D.did well 36.A.could

B.can

C.may

D.would 37.A.400-meter B.400-meters C.400 meter D.400 meters 38.A.passes B.pass

C.passed D.to pass 39.A.me

B.him

C.her

D.us 40.A.am

B.be

C.will be D.was 第四部分閱讀理解（30分）

I.閱讀短文，根據(jù)短文內(nèi)容,從短文后各題所給的A、B、C、D四個(gè)選項(xiàng)中, 選擇最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。（每小題2分，共20分）A American boys and girls love to watch television.Some children spend six hours a day in school and four to six hours a day in front of the television set.Some even watch television for eig ht hours or more on Sunday.Televisions are like books or films.A child can leam bad things and good things from them.Some shows help children to understand the news and places from other countries or other times in history.With television a child does not have to go to the zoo to see animals or to the ocean to see a ship.Boys and girls can see a play, a concert or a game at home.Television brings many places and events into our homes.Some programs show crime and other things that are bad for children，so parents sometimes help them to find other interesting things to do.41.Childre n usually spend ______ a day in school.A.six hours

B.more than eight hours C.only a few hours

D.four hours 42.Some children spend eight hours or more ______ on Sunday.A.studying

B.playing C.watching TV

D.helping their parents 43.On television children can see ______.A.games B.big animals

C.oceans D.almost everything 44.“Television brings many places and events into our homes." means ______ A.television makes things happen on homes B.we can know places and events without going to see them C.we can see houses and buildings on TV D.we can find them easily 45.Parents sometimes help their children find other things to do when there is ______ for children.A.a bad program

B.an animal C.a game

D.an uninteresting film B William Henry Harrison, the ninth president of the US, was bom in a small town.When he was a boy, he was very quiet and shy.Because he was so quiet, every one thought that he wasn't bright.The people in the town often put a nickel(五 分硬幣）and a dime(一角硬幣）before him and asked him which to choose.He always chose the nickel and they laughed.One day a woman felt sorry for him.She askeddo you never take a dime and always choose a nickel instead? Do you know a nickel is worth much less than a dime?” “ Certainly I know it,，’ William answered slowly.“ But if I choose the dime，they will not ask m e to choose them any more.”

46.Which of the following is true according to the passage? A.William Henry Harrison was the eighth president of the United States.B.William Henry Harrison was bom in a big town.C.William Henry Harrison was very quiet and shy when he was a boy.D.William Henry Harrison wasn’t bright.47.Why did people in the town think that he wasn’t bright? A.Because he was bom in a small town.B.Because he was so quiet.C.Because he was the ninth president of the US.D.Because he liked money.48.Why did the people laugh at William Henry Harrison? A.Becausse he was bright.B.Because he was not shy.C.Because he loved the nickel.D.Because he always chose the nickel.49.Did William Henry Harrison know a nickel was worth much less than a dime? A.Yes, he did.B.No, he didn’t.C.Yes, he does.D.No, he doesn’t.50.What do you think of William Henry Harrison? A.Stupid.B.Clever.C.Naughty.D.Brave, II.閱讀短文,判斷短文后各題所給句子的內(nèi)容是否與短文內(nèi)容相符，相符 的請(qǐng)?jiān)诖痤}卡上相應(yīng)題號(hào)后的選項(xiàng)中將A項(xiàng)涂黑，不相符的則將B項(xiàng)涂黑。(每小題2分,共10分）

2012 has also brought in a new age for Chinese TV.The country’s first 3-D TV channel has started broadcasting(播放).Opened on New Year’s Day, the channel will air different programs including documentaries, sports, serials and live events— including the CCTV New Year Gala and the Olympic Games.The 3-D channel broadcasts from 10:30 a.m.through midnight，Beijing time each day.There are no viewing fees(費(fèi)用）during the early phase of operation(運(yùn)行階段），and viewers can get the full 3-D effect by wearing 3-D glasses.Six TV stations have worked together to produce the channel, including CCTV, Beijing, Tianjin, Shanghai, Jiangsu and Shenzhen TV stations.Each station is working on a specific program, while the channel itself is broadcast through CCTV.51.The country's first 3-D TV channel started broadcasting on New Year’s Day.52.The 3-D TV channel will not air the Olympic Games.53.Viewers can get the full 3-D effect by wearing 3-D glasses.54.The 3-D TV channel broadcasts from 8:30 a.m.through midnight, Beijing time every day.55.Tliere are viewing fees(費(fèi)用）during the early phase of operation(運(yùn)行階段）? 卷 II第五部分

任務(wù)型閱讀（10分）

I.閱讀短文，按照短文后的要求答題。請(qǐng)把答案寫在答題卡相應(yīng)的位置。（每 小題2分，共10分）

More than 85% of respondents(調(diào)查對(duì)象）to a survey about the Chinese Lunar New Year said they expect the festival's traditions to be continued, survey res ults have show n.The survey, done online by the China Youth Daily Social Investigation Center on 7,012 people, showed that 88%of respondents consider reuniting with family to be the most important part of the festival.According to the survey, 78.6% of respondents see the festival as an opportunity to visit relatives as many people live far from their hometowns.Wan Jianzhong, a professor of Beijing Normal University, said that Lunar New Year traditions, including visiting the elderly, holding family get-togethere and setting off firecrackers(放鞭炮），have mostly been preserved(保持），but some others are disappearing.“ During the Spring Festival，people woricing outside their hometowns hurry to get home and reunite with their families.This causes a great national migration(遷徙），because the tradition of family get-togethers on Chinese New Years Eve is rooted in the hearts of the Chinese，” Wan said.任務(wù)一：替換

56.寫出短文中能替換下列句子劃線部分的詞或短語。

According to the survey, over 5960 respondents expect Lunar New Year traditions to be continued.任務(wù)二：用英語回答問題。

57.How many people were surveyed about the Chinese Lunar New Year? 58.Where was the survey done? 59.Was holding family get-togethers a Lunar New Year tradition? 任務(wù)三：翻譯

將短文中的劃線部分翻譯成中文。第六部分

詞匯（10分）

根據(jù)句意和首字母或漢語提示，寫出句中所缺單詞的正確形式，每空一詞。請(qǐng)把 完整的單詞寫在答題卡相應(yīng)的位置。（每小題1分,共10分）

61.Mike’s parents are b __________ teachers.Xk b1.co m 62.People will __________(飛往）to the moon for vacation.63.You should ___________(刷)your teeth after meals.64.Don't __________(吼）！I can hear you.65.Mary wanted to buy a __________(新的）computer.66.Keep your eyes closed.Don't open them u__________ I tell you to do so.67.Lucy is thinner than Lily, but Lily is t __________ than Lucy ? 68.M__________ is the fifth month of a year.69.My favorite season is __________(夏季）because I can swim in the river behind my house.70.What are you g__________ to do tomorrow? 第七部分情景交際（10分）

根據(jù)對(duì)話內(nèi)容，在每小題的空白處填上合適的句子，使對(duì)話意思完整、通 順。請(qǐng)把答案寫在答題卡相應(yīng)的位置。（每小題2分，共10分）

David：Excuse me, sir.Could you please tell me the way to the Space Museum? Man: Sorry,.David：Thank you all the same.(Then David goes and asks a woman for help.)David ：

Excuse me，could you tell me how I can get to the Space Museum? Woman：Sure.Go along this street.When you reach the traffic lights, turn left.At the end of the road, you'll see it.David：It's very kind of you.By the way，72 ? Woman: No, it is not very far.David ： Can I take a bus to get there? Woman ： 73.David ：74 ? Woman ： You can take the No.17 bus.David： 75.Woman:It’s my pleasure.第八部分短文改錯(cuò)（10分）

此題要求改正所給短文中的錯(cuò)誤，對(duì)標(biāo)有題號(hào)的每一行劃線部分和有漏字 符號(hào)（A）處作出判斷： 如無錯(cuò)誤，在該行右邊橫線上畫一個(gè)如有錯(cuò)誤（每行只有一個(gè)），則按 下列情況改正： 劃線部分為多余的詞:把該詞寫在該行右邊橫線上,并劃上斜線（）。劃線部分為錯(cuò)詞:在該行右邊橫線上寫出正確的詞。有浞字符號(hào)處缺一個(gè)詞:在該行右邊橫線上寫出所缺的詞。

請(qǐng)?jiān)诖痤}卡相應(yīng)位罝答題。（每小題1分，共10分）

Two years ago, my English class is difficult.First of all，76.__________ I couldn’t understand the teacher when she speak English.She

77.__________

spoke so quick that I couldn’t understand every word.Later

78.__________ on，I realized that it don’t matter if you dont understand every

79.__________ word.I was also afraid to speak in die class, because I thought

80.__________ my classmates might laugh at me.I couldn’t always make complete 81.__________ sentences，either.Then I started to watched English-language TV.82.__________ I think that doing lots of listening practice is one of the secret of

83.__________ becoming a good language leamer.Now I enjoy leam English and 84.__________ I got an A this term.My teacher is very impressed.85.第九部分書面表達(dá)（30分)書面表達(dá)分A、B兩部分,A部分10分,B部分20分。A.假如你校成功舉辦了第一次英語角活動(dòng)，請(qǐng)根據(jù)下列提示，以“The First English Comer in Our School”為題，用英語為學(xué)校的校報(bào)寫一篇20-30詞的簡(jiǎn) 訊。請(qǐng)?jiān)诖痤}卡相應(yīng)位罝答題。（10分）

活動(dòng)時(shí)間:2012年6月14日下午3:00-4:00 活動(dòng)內(nèi)容:用英語交談?dòng)⒄Z學(xué)習(xí)的方法 活動(dòng)地點(diǎn):學(xué)校圖書館 參加人數(shù):英語教師和學(xué)生共100余人 活動(dòng)效果:學(xué)生積極參與，有利于促進(jìn)英語學(xué)習(xí)

B.假如你是張武,是某校八年級(jí)學(xué)生，感到學(xué)習(xí)任務(wù)太重,每天要學(xué)習(xí)的科 目多，老師布罝的作業(yè)多，連周末和節(jié)假日都有做不完的作業(yè)，很多時(shí)候放學(xué)后 老師還要補(bǔ)課，每天幾乎都沒有屬于自己的時(shí)間，睡眠時(shí)間嚴(yán)重不足，身心疲憊，不知道怎么辦。請(qǐng)你以張武的名義用英語寫一封80-100詞的信給某報(bào)社的中 學(xué)生信箱，談?wù)勀愕倪@種情況，并希望老師們少布罝作業(yè)，多 關(guān)愛學(xué)生的健康成 長(zhǎng)。（20分）

部分參考詞匯:editor(編輯）task(任務(wù)）healthy growth(健康成長(zhǎng)）subjects(科目）

第三篇：長(zhǎng)江寒假作業(yè)九年級(jí)數(shù)學(xué)答案

長(zhǎng)江寒假作業(yè)九年級(jí)數(shù)學(xué)答案

1、如圖，火車勻速通過隧道（隧道長(zhǎng)大于貨車長(zhǎng)）時(shí)，火車進(jìn)入隧道的時(shí)間與火車在隧道內(nèi)的長(zhǎng)度之間的關(guān)系用圖象描述大致是

（）

2、拋物線 的對(duì)稱軸是

（）(A)直線x＝1

(B)直線x＝3

(C)直線x＝－1

(D)直線x＝－3

3、已知二次函數(shù)，當(dāng)b從-1逐漸變化到1的過程中，它所對(duì)應(yīng)的拋物線位置也隨之變動(dòng)．關(guān)于拋物線的移動(dòng)方向的描述中，正確的是（）

A．先往左上方移動(dòng)，再往左下方移動(dòng)

B．先往左下方移動(dòng)，再往左上方移動(dòng) C．先往右上方移動(dòng)，再往右下方移動(dòng)

D．先往右下方移動(dòng)，再往右上方移動(dòng)

4、已知函數(shù) 的圖象與x軸有交點(diǎn)，則k的取值范圍是（）

5、若二次函數(shù)（a，b為常數(shù)）的圖象如圖，則a的值為（）

A.1

B.C.D.-2

6、二次函數(shù) 的圖像可以由二次函數(shù) 的圖像平移而得到，下列平移正確的是

（）A.先向左平移2個(gè)單位，再向上平移1個(gè)單位 B.先向左平移2個(gè)單位，再向下平移1個(gè)單位 C.先向右平移2個(gè)單位，再向上平移1個(gè)單位 D.先向右平移2個(gè)單位，再向下平移1個(gè)單位

7、已知：a>0，b<0，c<0，則二次函數(shù) 的圖像可能是（）

A

B

C

D

8、已知a=－1，點(diǎn)（a－1，y1），（a，y2），（a+5，y3）都在函數(shù) 的圖象上，則

()

A．y1

B．y1

C．y3

D．y2

9、如圖，一條拋物線與x軸相交于A、B兩點(diǎn)，其頂點(diǎn)P在折線C－D－E上移動(dòng)，若點(diǎn)C、D、E的坐標(biāo)分別為（-1，4）、（3，4）、（3，1），點(diǎn)B的橫坐標(biāo)的最小值為1，則點(diǎn)A的橫坐標(biāo)的最大值為（）

A、1

B、2

C、3

D、4

第9題

第10題

10、如圖6，拋物線 與 交于點(diǎn)A(1，3)，過點(diǎn)A作x軸的平行線，分別交兩條拋物線于點(diǎn)B、C．則以下結(jié)論：

①無論取何值，的值總是正數(shù)． ②．a(chǎn)=1 ③當(dāng)x=0時(shí)，． ④．2AB=3AC 其中正確結(jié)論是（）

A．①②

Ｂ．②③

Ｃ．③④

Ｄ．①④

11、將拋物線 先向左平移2個(gè)單位，再向下平移3個(gè)單位，那么所得拋物線的函數(shù)關(guān)系式是（）A．

B．

C．

D．

二、解答題

12、直線 與坐標(biāo)軸分別交于A、B兩點(diǎn)，動(dòng)點(diǎn)P、Q同時(shí)從點(diǎn)O出發(fā)，同時(shí)到達(dá)點(diǎn)A，運(yùn)動(dòng)停止．點(diǎn)Q沿線段OA運(yùn)動(dòng)，速度為每秒1個(gè)單位長(zhǎng)度，點(diǎn)P沿路線O→B→A運(yùn)動(dòng)．（1）直接寫出A、B兩點(diǎn)的坐標(biāo)；

（2）設(shè)點(diǎn)Q的運(yùn)動(dòng)時(shí)間為t秒，的面積為s，求出s與t之間的函數(shù)關(guān)系式，并求出t的取值范圍；

13、如圖,拋物線 經(jīng)過點(diǎn)A(1,0)和點(diǎn)P(3,4).(1)求此拋物線的解析式,寫出拋物線與x軸的交點(diǎn)坐標(biāo)和頂點(diǎn)坐標(biāo).(2)若拋物線與軸的另一個(gè)交點(diǎn)為B,現(xiàn)將拋物線向射線AP方向平移,使P點(diǎn)落在M點(diǎn)處,同時(shí)拋物線上的B點(diǎn)落在點(diǎn)D（BD∥PM）處.設(shè)拋物線平移前P、B之間的曲線部分與平移后M、D之間的曲線部分，與線段MP、BD所圍成的面積為m, 線段 PM的長(zhǎng)度為n,求m與n的函數(shù)關(guān)系式.14、如圖，有長(zhǎng)為24m的籬笆，一面利用墻（墻的最大可用長(zhǎng)度a為10m），圍成中間隔有一道籬笆的長(zhǎng)方形花圃．設(shè)花圃的寬AB為x m，面積為S ．

（1）求S與x的函數(shù)關(guān)系式；

（2）如果要圍成面積為45 的花圃，AB的長(zhǎng)是多少米？

（3）能圍成面積比45 更大的花圃嗎？如果能，請(qǐng)求出最大面積，并說明圍法；如果不能，請(qǐng)說明理由．

15、如圖，在平面直角坐標(biāo)系中，直線y=-2x+42交x軸與點(diǎn)A,交直線y=x于點(diǎn)B,拋物線 分別交線段AB、OB于點(diǎn)C、D，點(diǎn)C和點(diǎn)D的橫坐標(biāo)分別為16和4，點(diǎn)P在這條拋物線上．（1）求點(diǎn)C、D的縱坐標(biāo)．

（2）求a、c的值．

（3）若Q為線段OB上一點(diǎn)，且P、Q兩點(diǎn)的縱坐標(biāo)都為5，求線段PQ的長(zhǎng)．

（4）若Q為線段OB或線段AB上的一點(diǎn)，PQ⊥x軸，設(shè)P、Q兩點(diǎn)之間的距離為d（d＞0），點(diǎn)Q的橫坐標(biāo)為m，直接寫出d隨m的增大而減小時(shí)m的取值范圍．

16、如圖，矩形ABCD的兩邊長(zhǎng)AB=18cm，AD=4cm，點(diǎn)P、Q分別從A、B同時(shí)出發(fā)，P在邊AB上沿AB方向以每秒2cm的速度勻速運(yùn)動(dòng)，Q在邊BC上沿BC方向以每秒1cm的速度勻速運(yùn)動(dòng)．設(shè)運(yùn)動(dòng)時(shí)間為x秒，△PBQ的面積為y（）.（1）求y關(guān)于x的函數(shù)關(guān)系式，并寫出x的取值范圍；（2）求△PBQ的面積的最大值.17、如圖，在△AOB中，，矩形CDEF的頂點(diǎn)C、D、F分別在邊AO、OB、AB上。（1）若C、D恰好是邊AO，OB的中點(diǎn)，求矩形CDEF的面積；（2）若，求矩形CDEF面積的最大值。

18、對(duì)于三個(gè)數(shù)a,b,c，用M{a,b,c}表示這三個(gè)數(shù)的平均數(shù)，用min{a,b,c}表示這三個(gè)數(shù)中最小的數(shù)．例如：

； ；

解決下列問題：

（1）填空： =

；如果，則x的取值范圍為 ．（2）①如果，求x的值；

②根據(jù)①，你發(fā)現(xiàn)了結(jié)論“如果，那么

（填a,b,c的大小關(guān)系）”．證明你發(fā)現(xiàn)的結(jié)論；

③運(yùn)用②的結(jié)論，填空：

，則x+y=

．

（3）在同一直角坐標(biāo)系中作出函數(shù)y=x+1，y=2-x的圖象（不需列表描點(diǎn)）．通過觀察圖象，填空： 的最大值為

．

19、如圖，已知拋物線 的對(duì)稱軸為直線x＝1，且拋物線經(jīng)過A(－1,0)、C(0，－3)兩點(diǎn)，與x軸交于另一點(diǎn)B.(1)求這條拋物線所對(duì)應(yīng)的函數(shù)解析式；

(2)在拋物線的對(duì)稱軸直線x＝1上求一點(diǎn)M，使點(diǎn)M到點(diǎn)A的距離與到點(diǎn)C的距離之和最小，并求出此時(shí)點(diǎn)M的坐標(biāo)；

(3)設(shè)點(diǎn)P為拋物線的對(duì)稱軸直線x＝1上的一動(dòng)點(diǎn)，求使∠PCB＝90°的點(diǎn)P的坐標(biāo)．

20、改革開放以來，某鎮(zhèn)通過多種途徑發(fā)展地方經(jīng)濟(jì)，1995年該鎮(zhèn)年國(guó)民生產(chǎn)總值為2億元，根據(jù)測(cè)算，該鎮(zhèn)國(guó)民生產(chǎn)總產(chǎn)值為5億元時(shí)，可達(dá)到小康水平。(1)若從1996年開始，該鎮(zhèn)國(guó)民生產(chǎn)總值每年比上一年增加0.6億元，該鎮(zhèn)通過幾年可達(dá)到小康水平?(2)設(shè)以2001年為第一年，該鎮(zhèn)第x年的國(guó)民生產(chǎn)總值為y億元，y與x之間的關(guān)系是 該鎮(zhèn)那一年的國(guó)民生產(chǎn)總值可在1995年的基礎(chǔ)上翻兩番（即達(dá)到1995年的年國(guó)民生產(chǎn)總值的4倍）？

21、兩個(gè)完全相同的矩形ABCD、AOEF按如圖所示的方式擺放，使點(diǎn)A、D均在y軸的正半軸上，點(diǎn)B在第一象限，點(diǎn)E在x軸的正半軸上，點(diǎn)F在函數(shù) 的圖象上，AB=1，AD=4．

(1)求k的值．

(2)將矩形ABCD繞點(diǎn)B順時(shí)針旋轉(zhuǎn)

得到矩形 ,邊 交函數(shù) 的圖象于點(diǎn)M，求 的長(zhǎng)．

22、在梯形ABCD中，AB//CD，點(diǎn)E在線段DA上，直線CE與BA的延長(zhǎng)線交于點(diǎn)G，（1）求證：△CDE∽△GAE;(2)當(dāng)DE：EA=1：2時(shí)，過點(diǎn)E作EF//CD交BC于點(diǎn)F且 CD=4,EF=6，求AB的長(zhǎng)

23、如圖，在平行四邊形ABCD中，過點(diǎn)A作AE⊥BC，垂足為E，連接DE，F(xiàn)為線段DE上一點(diǎn)，且∠AFE＝∠B.(1)求證：△ADF∽△DEC；

(2)若AB＝4，AD＝，AE＝3，求ED，AF的長(zhǎng).24、如圖，一艘軍艦從點(diǎn)A向位于正東方向的C島航行，在點(diǎn)A處測(cè)得B島在其北偏東（即），航行75海里到達(dá)點(diǎn)D處，測(cè)得B島在其北偏東，繼續(xù)航行5海里到達(dá)C島，此時(shí)接到通知，要求這艘軍艦在半小時(shí)內(nèi)趕到正北方向的B島執(zhí)行任務(wù)，則這艘軍艦航行速度至少為多少時(shí)才能按時(shí)趕到B島？

25、已知，延長(zhǎng)BC到D，使CD=BC．取AB的中點(diǎn)F，連結(jié)FD交AC于點(diǎn)E．（1）求 的值；（2）若，求 的長(zhǎng)．

26、有一河堤壩BCDF為梯形，斜坡BC坡度，壩高為5 m，壩頂CD = 6 m，現(xiàn)有一工程車需從距B點(diǎn)50 m的A處前方取土，然后經(jīng)過B—C—D放土,為了安全起見，工程車輪只能停在離A、D處1 m的地方即M、N處工作，已知車輪半經(jīng)為1 m，求車輪從取土處到放土處圓心從M到N所經(jīng)過的路徑長(zhǎng)。（）

27、如圖，某種新型導(dǎo)彈從地面發(fā)射點(diǎn)L處發(fā)射，在初始豎直加速飛行階段，導(dǎo)彈上升的高度y（km）與飛行時(shí)間x（s）之間的關(guān)系式為（0≤x≤10）．發(fā)射3s后，導(dǎo)彈到達(dá)A點(diǎn)，此時(shí)位于與L同一水平面的R處雷達(dá)站測(cè)得AR的距離是2km，再過3s后，導(dǎo)彈到達(dá)B點(diǎn)．（1）求發(fā)射點(diǎn)L與雷達(dá)站R之間的距離；

（2）當(dāng)導(dǎo)彈到達(dá)B點(diǎn)時(shí)，求雷達(dá)站測(cè)得的仰角（即∠BRL）的正切值．

28、如圖，為測(cè)量江兩岸碼頭B、D之間的距離，從山坡上高度為50米的A處測(cè)得碼頭B的俯角∠EAB為15°，碼頭D的俯角∠EAD為45°，點(diǎn)C在線段BD的延長(zhǎng)線上，AC⊥BC，垂足為C，求碼頭B、D的距離（結(jié)果保留整數(shù)）．

29、如圖，A，B兩座城市相距100千米，現(xiàn)計(jì)劃要在兩座城市之間修筑一條高等級(jí)公路（即線段AB）。經(jīng)測(cè)量，森林保護(hù)區(qū)中心P點(diǎn)在A城市的北偏東30°方向，B城市的北偏西45°方向上。已知森林保護(hù)區(qū)的范圍在以P為圓心，50千米為半徑的圓形區(qū)域內(nèi)，請(qǐng)問：計(jì)劃修筑的這條高等級(jí)公路會(huì)不會(huì)穿越保護(hù)區(qū)？為什么？

30.如圖，在矩形 中，．點(diǎn) 在 上，交 于，交于 于 ．點(diǎn) 從 點(diǎn)（不含）沿 方向移動(dòng)，直到使點(diǎn) 與點(diǎn) 重合為止．

（1）設(shè)，的面積為 ．請(qǐng)寫出 關(guān)于 的函數(shù)解析式．（2）點(diǎn) 在運(yùn)動(dòng)過程中，的面積是否有最大值，若有，請(qǐng)求出最大值及此時(shí) 的取值；若無，請(qǐng)說明理由．

第四篇：長(zhǎng)江九年級(jí)數(shù)學(xué)寒假作業(yè)答案

長(zhǎng)江九年級(jí)數(shù)學(xué)寒假作業(yè)答案

一、選擇題

1.（江蘇省常州市2002年2分）以長(zhǎng)為3cm，5cm，7cim，10cm的四條線段中的三條線段為邊，可以構(gòu)成三角形的個(gè)數(shù)是【

】 A.1個(gè)

B.2個(gè)

C.3個(gè)

D.4個(gè) 【答案】B。

【考點(diǎn)】三角形三邊關(guān)系。

【分析】從4條線段里任取3條線段組合，可有4種情況，看哪種情況不符合三角形三邊關(guān)系，舍去即可：

首先進(jìn)行組合，則有3，5，7；3，5，10；3，7，10；5，7，10四種情況，根據(jù)三角形的三邊關(guān)系，則其中的3，5，10和3，7，10不能組成三角形。故選B。2.（江蘇省常州市2004年2分）下列命題中錯(cuò)誤的命題是【

】（A）的平方根是

（B）平行四邊形是中心對(duì)稱圖形（C）單項(xiàng)式 與 是同類項(xiàng)（D）近似數(shù) 有三個(gè)有效數(shù)字 【答案】C。

【考點(diǎn)】平方根，平行四邊形的性質(zhì)，同類項(xiàng)，近似數(shù)和有效數(shù)字。【分析】A、也就是9，9的平方根是±3，正確，故本選項(xiàng)正確；

B、平行四邊形是中心對(duì)稱圖形，對(duì)角線的交點(diǎn)是對(duì)稱中心，故本選項(xiàng)正確； C、單項(xiàng)式 與 是相同字母的次數(shù)不同，不是同類項(xiàng)，故本選項(xiàng)錯(cuò)誤； D、近似數(shù)3.14×103有三個(gè)有效數(shù)字，正確。故選C。

3.江蘇省常州市2004年2分）如圖，在△ABC中，DE∥BC，DE分別與AB、AC相交于點(diǎn)D、E，若AD=4，DB=2，則AE︰EC的值為【

】

（A）0.5

（B）2

（C）

（D）

【答案】B。

【考點(diǎn)】平行線分線段成比例。

【分析】∵DE∥BC，∴AD：DB=AE：EC。

而AD=4，DB=2，∴AE：EC=AD：DB=4：2=2。故選B。

4.（江蘇省常州市2005年2分）如圖，已知AB∥CD，直線 分別交AB、CD于點(diǎn)E、F，EG平分∠BEF，若∠EFG=40°，則∠EGF的度數(shù)是【

】

A、60°

B、70°

C、80°

D、90° 【答案】B。

【考點(diǎn)】平行線的性質(zhì)，角平分線的定義。

【分析】根據(jù)兩直線平行，同旁內(nèi)角互補(bǔ)可求出∠FEB，然后根據(jù)角平分線的性質(zhì)求出∠BEG，最后根據(jù)內(nèi)錯(cuò)角相等即可解答： ∵AB∥CD，∴∠BEF+∠EFG=180°。又∠EFG=40°，∴∠BEF=140°。

∵EG平分∠BEF，∴∠BEG= ∠BEF=70°?！唷螮GF=∠BEG=70°。故選B。

5.（江蘇省常州市2006年2分）銳角三角形的三個(gè)內(nèi)角是∠A、∠B、∠C，如果，，那么、、這三個(gè)角中【

】

A．沒有銳角

B．有1個(gè)銳角

C．有2個(gè)銳角

D．有3個(gè)銳角 【答案】A。

【考點(diǎn)】三角形的外角性質(zhì)。

【分析】根據(jù)三角形的外角和銳角三角形的性質(zhì)作答：

∵銳角三角形中三個(gè)角∠A、∠B、∠C都是銳角，而由題意知，、、分別是其外角，∴根據(jù)三角形外角的性質(zhì)，可知、、這三個(gè)角都是鈍角。故選A。

6.（江蘇省常州市2007年2分）下列軸對(duì)稱圖形中，對(duì)稱軸的條數(shù)最少的圖形是【

】 A．圓

B．正六邊形

C．正方形

D．等邊三角形 【答案】D。

【考點(diǎn)】軸對(duì)稱圖形。

【分析】根據(jù)軸對(duì)稱圖形的概念求解：

A、圓有無數(shù)條對(duì)稱軸；B、正六邊形有六條對(duì)稱軸；C、正方形有四條對(duì)稱軸；D、等邊三角形有三條對(duì)稱軸。故選D。

二、填空題

3.（江蘇省常州市2002年1分）將兩塊直角三角尺的直角頂點(diǎn)重合為如圖所示的形狀，若∠AOD=1270，則∠BOC=

▲

.【答案】53。

【考點(diǎn)】余角的性質(zhì)。

【分析】因?yàn)閮芍苯侵苯堑捻旤c(diǎn)重合于點(diǎn)O，由∠AOD=127°可求得∠AOC的值，再根據(jù)角與角的關(guān)系轉(zhuǎn)換求解：

∵∠AOD=∠AOC+∠DOC=∠AOC+90°=127°，∴∠AOC=37°。又∵∠AOC+∠BOC=37°+∠BOC=90°，∴∠BOC=53°。

4.（江蘇省常州市2003年2分）光線以圖所示的角度α照射到平面鏡Ⅰ上，然后在平面鏡Ⅰ、Ⅱ之間來回反射，已知∠α=60°，∠β=50°，∠γ=

▲

度。

【答案】40。

【考點(diǎn)】跨學(xué)科問題，反射的性質(zhì)，平角定義，三角形內(nèi)角和定理?！痉治觥坷梅瓷涞男再|(zhì)得到入射光線與水平線的夾角等于反射光線與水平線的夾角、平角定義和三角形內(nèi)角和定理來求解： 如答圖所示，根據(jù)反射的性質(zhì)，得

∠BAC=∠α=60°，∠ABC=180°－2∠β=80°，∠ACB=∠γ。在△ABC中，∠BAC＋∠ABC＋∠ACB=180°，則

∠ACB=180°－（∠BAC＋∠ABC）=40°，即∠γ=40°。

5.（江蘇省常州市2004年2分）若∠α的余角是30°，則∠α=

▲

°，sinα=

▲。

【答案】60。

【考點(diǎn)】余角，特殊角的三角函數(shù)值。

【分析】根據(jù)余角的定義求得α的值，再求它的正弦值：

∵∠α的余角是30°，∴∠α=90°－30°=60°，∴sianα=sian60°=。

6.（江蘇省常州市2006年2分）若 的補(bǔ)角是120°，則 ＝

▲

°，▲

?！敬鸢浮?0。

【考點(diǎn)】補(bǔ)角，特殊角的三角函數(shù)值。

【分析】根據(jù)補(bǔ)角的概念求出 的值，再根據(jù)特殊角的三角函數(shù)值求解即可： ∵ 的補(bǔ)角是120°，∴ =180°－120°=60°，∴。

7.（江蘇省常州市2006年1分）如圖，小亮從A點(diǎn)出發(fā)，沿直線前進(jìn)10米后向左轉(zhuǎn)30°，再沿直線前進(jìn)

10米，又向左轉(zhuǎn)30°，……照這樣走下去，他第一次回到出發(fā)地A點(diǎn)時(shí)，一共走了

▲

米。

【答案】120。

【考點(diǎn)】平角定義，多邊形內(nèi)角和定理。

【分析】根據(jù)題意，小亮這樣走法形成一個(gè)正多邊形，由平角定義，知正多邊形的每個(gè)內(nèi)角等于1500。

∴根據(jù)多邊形內(nèi)角和定理，得，解得。

∴照這樣法，他第一次回到出發(fā)地A點(diǎn)時(shí)，一共走了12×10=120米。

8.（江蘇省常州市2007年2分）若，則 的余角是

▲

°，▲

． 【答案】60：。

【考點(diǎn)】余角，特殊角的三角函數(shù)值。

【分析】根據(jù)互余的性質(zhì)和特殊角的三角函數(shù)值計(jì)算：的余角是90°－ =90°－30°=60°： cosα=cos30°=。

9.（江蘇省常州市2008年2分）如圖，在△ABC中BE平分∠ABC，DE∥BC，∠ABE=35°，則

∠DEB=______°，∠ADE=

▲

°.【答案】35；70。

【考點(diǎn)】角平分線的定義，平行線的性質(zhì)。

【分析】利用平行線的性質(zhì)及角平分線的定義即可求出：

∵在△ABC中，BE平分∠ABC，∠ABE=35°，∴∠ABC=70°，∠EBC=35°?！逥E∥BC，∴∠DEB=∠EBC=35°；∠ADE=∠ABC=70°。

10.（2011江蘇常州2分）若∠ 的補(bǔ)角為120°，則∠ =

▲，Sin =

▲。

【答案】600。

【考點(diǎn)】補(bǔ)角，特殊角的三角函數(shù)。

【分析】利用補(bǔ)角和600角的正弦，直接得出結(jié)果：根據(jù)補(bǔ)角定義，∠α＝180°—120°＝60°，于是sinα＝sin60°＝。11.（2012江蘇常州2分）若∠α=600，則∠α的余角為

▲，cosα的值為

▲

。【答案】300。

【考點(diǎn)】余角定義，特殊角的三角函數(shù)值。【分析】根據(jù)余角定義，∠α的余角為900－600=300；由特殊角的三角函數(shù)值，得cosα=。

三、解答題

1.（江蘇省常州市2002年7分）如圖，它是由6個(gè)面積為1的小正方形組成的矩形，點(diǎn)A，B，C，D，E，F(xiàn)，G是小正方形的頂點(diǎn)，以這七個(gè)點(diǎn)中的任意三個(gè)點(diǎn)為頂點(diǎn)，可組成多少個(gè)面積為1的三角形？請(qǐng)你寫出所有這樣的三角形？

【答案】解：由題意得符合條件的三角形高是1，對(duì)應(yīng)的底是2，或高是2，對(duì)應(yīng)的底是1，因此，以點(diǎn)A，B，C，D，E，F(xiàn)，G中的任意三個(gè)點(diǎn)為頂點(diǎn)，可組成多少個(gè)面積為1的三角形共有14個(gè)，它們是：△ADE，△AEF，△AFG，△BDE，△BEF，△BFG，△ABD，△ABE，△ABF，△ABG，△CDF，△CEG，△CBF，△CAG?！究键c(diǎn)】三角形的面積。

【分析】根據(jù)三角形的面積公式，觀察圖形，只要保證該三角形的高是1，對(duì)應(yīng)的底是2，或高是2，對(duì)應(yīng)的底是1，即可。在列舉時(shí)，宜采用字典排列法。

2.（江蘇省常州市2004年8分）用水平線和豎直線將平面分成若干個(gè)邊長(zhǎng)為1的小正方形格子，小正方形的頂點(diǎn)，叫格點(diǎn)，以格點(diǎn)為頂點(diǎn)的多邊形叫格點(diǎn)多邊形。設(shè)格點(diǎn)多邊形的面積為S，它各邊上格點(diǎn)的個(gè)數(shù)和為。

（1）上圖中的格點(diǎn)多邊形，其內(nèi)部都只有一個(gè)格點(diǎn)，它們的面積與各邊上格點(diǎn)的個(gè)數(shù)和的對(duì)應(yīng)關(guān)系如下表，請(qǐng)寫出S與 之間的關(guān)系式。答：S=

。多邊形的序號(hào) ① ② ③ ④ … 多邊形的面積S 2 2.5 3 4 … 各邊上格點(diǎn)的個(gè)數(shù)和5 6 8 …

（2）請(qǐng)你再畫出一些格點(diǎn)多邊形，使這些多邊形內(nèi)部都有而且只有2格點(diǎn)。此時(shí)所畫的各個(gè)多邊形的面積S與它各邊上格點(diǎn)的個(gè)數(shù)和 之間的關(guān)系式是：S=。

（3）請(qǐng)你繼續(xù)探索，當(dāng)格點(diǎn)多邊形內(nèi)部有且只有 個(gè)格點(diǎn)時(shí)，猜想S與 有怎樣的關(guān)系？答：S=

?！敬鸢浮拷猓海?）。

（2）畫格點(diǎn)多邊形如下：

+1。

（3）。

【考點(diǎn)】分類歸納(圖形的變化類)，網(wǎng)格問題，正方形的性質(zhì)?！痉治觥浚?）由表可以直接得到。

（2）當(dāng)多邊形內(nèi)部都有而且只有2格點(diǎn)，它們的面積與各邊上格點(diǎn)的個(gè)數(shù)和的對(duì)應(yīng)關(guān)系如下表：

多邊形的序號(hào) ① ② ③ ④ ⑤ …

多邊形的面積S 2.5 3 3.5 4 4.5 … 各邊上格點(diǎn)的個(gè)數(shù)和4 5 6 7 …

可見，這時(shí)所畫的各個(gè)多邊形的面積S與它各邊上格點(diǎn)的個(gè)數(shù)和 之間的關(guān)系式是：S= +1

第五篇：九年級(jí)物理長(zhǎng)江寒假作業(yè)答案

九年級(jí)物理長(zhǎng)江寒假作業(yè)答案

一、單項(xiàng)選擇題(每小題2分，共30分)1．下列物態(tài)變化中，屬于熔化的是（）

A．鐵塊化成鐵水

B．盤子里的水晾干了

C．湖水表面結(jié)冰

D．水沸騰時(shí)水面出現(xiàn)“白氣”

2.下列物態(tài)變化現(xiàn)象中，屬于液化現(xiàn)象的是()

A.初春，冰雪消融匯成溪流

B.盛夏，剛從冰箱中拿出的飲料瓶外壁出現(xiàn)水滴

C.金秋，清晨的霧在太陽出來后散去

D.寒冬，晾在室外冰凍的衣服也會(huì)干 3.圖1所示四幅圖中，由凝華而形成的自然現(xiàn)象是（）

4．下列物態(tài)變化過程中，需要吸熱的是（）

Ａ．初春，早晨河面結(jié)有薄冰

Ｂ．夏天，打開冰棍紙看到“白氣” Ｃ．深秋，屋頂?shù)耐呱辖Y(jié)了一層霜

Ｄ．冬天，冰凍的衣服逐漸變干 5．關(guān)于“熱機(jī)”，下列說法中錯(cuò)誤的是：

（）A．通過技術(shù)改進(jìn)，可以使熱機(jī)的效率達(dá)到100%

B．減少城市熱島效應(yīng)的措施之一就是倡導(dǎo)“綠色出行”。

C．用水而不用其它循環(huán)物質(zhì)降低熱機(jī)的溫度，主要是利 用水的比熱容最大的特性

D．嚴(yán)寒的冬天，有人晚上把熱機(jī)水箱中的水放出，是防止氣溫降低時(shí)，水凝固而脹壞水箱 6．醫(yī)生在發(fā)燒病人身上擦鞋酒精溶液，可以達(dá)到降低體溫的效果。他的依據(jù)是（）

A、酒精熔化時(shí)吸熱

B、酒精液化時(shí)吸熱 C、酒精汽化時(shí)吸熱

D、酒精升華時(shí)吸熱

7．魔術(shù)師把手伸進(jìn)一鍋沸騰的“油”，1分鐘、2分鐘??再把手拿出來——沒事！對(duì)這一現(xiàn)象的分析正確的是（）

A．魔術(shù)師有特異功能

B．是因?yàn)椤坝汀钡姆悬c(diǎn)低 C．“油”在沸騰時(shí)的溫度不斷升高

D．是因?yàn)槭稚险从兴樟恕坝汀敝械臒?8.下列四個(gè)實(shí)例中，能夠使蒸發(fā)減慢的是（）

A．將濕衣服晾在通風(fēng)向陽處

B．將濕手伸到干手器下方吹 C．將新鮮的黃瓜裝入塑料袋

D．將新收獲的玉米攤開晾曬

9．下列有關(guān)熱現(xiàn)象的說法中正確的是（）

A．高空中的冰晶在空氣中下落變成雨滴時(shí)，內(nèi)能增加了 B．初冬的早晨，地面上結(jié)有一層白霜屬于升華 C．所有物體在熔化過程中溫度不斷升高

D．物體的溫度可以降到-273.15℃以下

10．以下與物態(tài)變化相關(guān)的說法正確的是（）

A．氣衣柜里放樟腦片，利用了汽化

B．氣溫低于水銀熔點(diǎn)的地方，不能使用水銀溫度計(jì)

C．北方的冬天，在菜窖里放幾桶水，是為了利用水的汽化吸熱

D．電冰箱使用的制冷物質(zhì)工作時(shí)，在冷凍室要液化，在冷凝器要汽化 11．如圖所示，能正確的描述冰的凝固過程的圖象是（）

12．如圖3所示是一個(gè)能吹出冷熱風(fēng)的電吹風(fēng)簡(jiǎn)化電路圖，圖中A是吹風(fēng)機(jī)，B是電熱絲。下列分析正確的是（）

A．只閉合開關(guān)S2，電吹風(fēng)吹出熱風(fēng)

B．只閉合開關(guān)S1，電吹風(fēng)吹出冷風(fēng) C．同時(shí)閉合開關(guān)S1、S2，電吹風(fēng)吹出冷風(fēng)

D．同時(shí)閉合開關(guān)S1、S2，電吹風(fēng)吹出熱風(fēng) 13．下列有關(guān)“電”的說法正確的是（）

A．摩擦起電的實(shí)質(zhì)是創(chuàng)造了電荷

B． 電燈中有電流，它的兩端一定有電壓 C．電路兩端有電壓就一定有電流

D．運(yùn)動(dòng)的電荷一定形成電流 14．如圖所示的電路，閉合開關(guān)S1和S2后，下列分析正確的是（）

A．小燈泡亮，電鈴響

B．小燈泡亮、電鈴不響； C．小燈泡不亮、電鈴響

D．小燈泡不亮、電鈴不響

15．某種電腦鍵盤清潔器有兩個(gè)開關(guān)，開關(guān)S1只控制照明用的小燈泡L，開關(guān)S2只控制吸塵用的電動(dòng)機(jī)M。在圖5所示的四個(gè)電路圖中，符合上述要求的是（）

二、填空題(第17、19、24、25題每空1分，其余每小題2分，共24分)16．我國(guó)家庭電路的電壓是___________V；對(duì)人體的安全電壓是不高于________V。

17．向云層投撒干冰是人工增雨、緩解旱情的方法之一。投撒到云層中的干冰

為氣體，并從周圍

大量的熱，使空氣中的水蒸氣

為小水滴或

為小冰晶，下落而形成雨。

18．如圖，把兩只手分別放入熱水和冷水中。然后，先把左手放入溫水中，感覺溫水的冷熱程度；再把右手放入溫水中，感覺溫水的冷熱程度。先后兩次對(duì)溫水冷熱程度的感覺是__________________（選填“左手感覺熱些”、“右手感覺熱些”或“一樣熱”）。這一現(xiàn)象表明____________（選填“物體的冷熱程度叫溫度”、“只憑感覺判斷溫度是可靠的”或“只憑感覺判斷溫度是不可靠的”）。

19．如圖所示是電冰箱工作原理圖。電冰箱工作原理是利用了一種叫氟利昂的物質(zhì)作為熱的“搬運(yùn)工”，把冰箱冷凍室里的“熱” 搬運(yùn)到冰箱外邊。氟利昂是一種既容易___________,又容易____________的物質(zhì)(填物態(tài)變化的名稱)。工作時(shí)，電動(dòng)壓縮機(jī)將氟利昂蒸氣壓縮并把它壓入冰箱的冷凝管里，在這里蒸氣變成液體并_________(“吸熱，或“放熱，)，這些熱被周圍空氣帶走。冷凝器里的液態(tài)氟利昂，經(jīng)過一段很細(xì)的毛細(xì)管進(jìn)入冰箱內(nèi)冷凍室的管子里，在這里迅速汽化________(“吸熱”或“放熱”)，使冰箱內(nèi)溫度降低，生成的蒸氣又被壓縮機(jī)抽走，壓入冷凝器，再液化并把從冰箱內(nèi)帶出來的熱放出。氟利昂這樣循環(huán)流動(dòng)，冰箱冷凍室里就可以保持相當(dāng)?shù)偷臏囟取?/p>

20．“鉆木”能“取火”，說明____________可以改變物體的內(nèi)能；“烤火”能“取暖”，說明____________可以改變物體的內(nèi)能．

21．2011年春季以來，長(zhǎng)江中下游地區(qū)遭遇罕見的旱災(zāi)。進(jìn)入夏季以來，氣溫的升高加劇了旱情，這是因?yàn)闅鉁氐纳達(dá)_______(選填“增加”或“減小”)水的蒸發(fā)。為了節(jié)約用水，果農(nóng)們利用了滴灌的方法給果樹澆水，如圖7，把水滴入果樹下的土里，這是利用___ _____(選填“增加”或“減小”)水在地面的表面積來減小水的蒸發(fā).22．物理學(xué)中把被毛皮摩擦過的橡膠棒所帶的電荷稱為_____電荷；電荷間的相互作用規(guī)律是_______________________。

23．臺(tái)式電腦使用一段時(shí)間后，為保證電腦的穩(wěn)定性，需要打開主機(jī)箱蓋除塵，這是因?yàn)樯犸L(fēng)扇的扇葉在轉(zhuǎn) 動(dòng)過程中與空氣摩擦帶上了

，可以

輕小物體，所以灰塵會(huì)附著在扇葉上。

24．如圖是簡(jiǎn)化了的電冰箱的電路圖。圖中M是壓縮機(jī)的電動(dòng)機(jī)，L是電冰箱內(nèi)部的照晚燈。當(dāng)電冰箱接入電路后，關(guān)閉了電冰箱的門時(shí)，開關(guān)S1與S2的狀態(tài)是S1___ __ S2___

__；當(dāng)又打開正在工作的電冰箱門時(shí)，開關(guān)S1與S2的狀態(tài)是S1___ __ S2___

__。（填“閉合”或“斷開”）

25．20kg的柴油完全燃燒釋放的熱量是

J。（q柴油=3.3×107J/kg）

三、簡(jiǎn)答題(4分)26．夏天，扇扇子為什么會(huì)感到?jīng)隹?

四、計(jì)算題(每小題7分，共14分)27．木炭的熱值為3.4×107J/Kg，完全燃燒多少千克木炭能放出1.7×107J的熱量？如果這些熱量全部被質(zhì)量為50Kg、溫度為10℃的某種液體吸收，溫度升高到90℃。那么，這種液體的比熱容是多少？

28．完全燃燒140克的干木柴所放出的熱量讓質(zhì)量為5Kg、初溫為30℃的水全部吸收，水溫會(huì)上升多少℃？（干木柴的熱值為1.2×107J/Kg，大氣壓為1標(biāo)準(zhǔn)大氣壓）

五、實(shí)驗(yàn)探究題[第30題(3)第二空、第31題、第33題第三、四空，34題每空各2分，其余每空1分，共28分] 29．請(qǐng)將圖所示的測(cè)量結(jié)果記錄在相應(yīng)的空格中。

(1)溫度計(jì)的示數(shù)_______℃；(2)如圖乙所示，體溫計(jì)的示數(shù)是_______℃；

（3）某次測(cè)量時(shí)兩電表示數(shù)如圖所示，則通過小燈泡的電流為

A，小燈泡兩端的電壓為

V，30.在探究水的沸騰實(shí)驗(yàn)中：

（1）1個(gè)標(biāo)準(zhǔn)大氣壓下酒精的沸點(diǎn)是78℃，煤油的沸點(diǎn)是150℃，完成本實(shí)驗(yàn)所用的溫度計(jì)液泡中的液體可能是

（選填“酒精”或“煤油”）；

（2）下表是某組同學(xué)的實(shí)驗(yàn)記錄，他們測(cè)得水的沸點(diǎn)是

℃； 時(shí)間/min 0 2 4 6 8 10 溫度/℃ 90 93 96 99 99 99

（3）請(qǐng)根據(jù)上表的數(shù)據(jù)在圖24的坐標(biāo)中描點(diǎn)畫出水的溫度 隨時(shí)間變化圖象。（2分）

31．根據(jù)圖所示的實(shí)物電路，在虛方框內(nèi)畫出對(duì)應(yīng)的電路圖．

32．將兩盞相同的燈L1和L2串聯(lián)或并聯(lián)后，直接接在電壓為6V的電源上。兩燈都發(fā)光。請(qǐng)根據(jù)下列操作及觀察到的現(xiàn)象，判斷燈L1、L2的連接方式，并填入表格中。

操作 取下一盞燈 取下一盞燈 將電壓表并聯(lián)接在一盞燈的兩端 將電壓表并聯(lián)接在一盞燈的兩端

現(xiàn)象 另一盞燈仍能發(fā)光 另一盞不發(fā)光 電壓表示數(shù)為3V 電壓表示數(shù)為6V L1、L2連接方式

33.炎熱的夏天來啦!小明家買了一臺(tái)電風(fēng)扇。站在電風(fēng)扇旁，小明覺觸涼爽。于是他大膽猜想：是電風(fēng)扇降低了室內(nèi)溫度。為了驗(yàn)證猜想，他關(guān)閉了門窗，選取兩支相同的溫度計(jì)，進(jìn)行了如下的探究實(shí)驗(yàn)。下列步驟中有來完成的部分，請(qǐng)將其補(bǔ)充完整。

這一現(xiàn)象引發(fā)了小明的思考，為什么室溫沒有降低，而吹電風(fēng)扇卻覺得涼爽呢?小明聯(lián)想到液體蒸發(fā)的知識(shí)。人體是通過汗液蒸發(fā)來調(diào)節(jié)體溫的，人在吹電風(fēng)扇時(shí)，汗液比平時(shí)蒸發(fā)得更快，所以感到?jīng)鏊?/p>

為了證明吹電風(fēng)扇能加快蒸發(fā)吸熱的速度，小明又進(jìn)行了實(shí)驗(yàn)，他只增加一種物質(zhì)，并且首先補(bǔ)充了一個(gè)步驟，然后重復(fù)前面實(shí)驗(yàn)的操作。請(qǐng)你將下表的內(nèi)容補(bǔ)充完整。

34．在“探究串聯(lián)電路中各點(diǎn)的電流有什么關(guān)系”時(shí)，小明設(shè)計(jì)實(shí)驗(yàn)如下．

A點(diǎn)的電流IA B點(diǎn)的電流IB C點(diǎn)的電流Ic 第一次測(cè)量 0.3A 0.3A 0.3A 第二次測(cè)量 0.2A 0.2A 0.2A 把兩個(gè)燈泡L1、L2串聯(lián)起來接到如圖所示電路中，分別把圖中A、B、C各點(diǎn)斷開，把___________接入，測(cè)量流過的電流，看看它們之間有什么關(guān)系．換上另外兩個(gè)小燈泡，再次測(cè)量三點(diǎn)的________，看看是否還有同樣的關(guān)系．上表是兩次測(cè)量的記錄數(shù)據(jù)．

分析和論證：

(1)在拆接電路時(shí)，開關(guān)S必須處于________狀態(tài)．

(2)結(jié)論：串聯(lián)電路中各處__________相等．

漳州市浦南中學(xué)期中考試卷

九年級(jí)物理答案

一、單項(xiàng)選擇題(每小題2分，共30分)題號(hào) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 答案 A B D D A C B C A B A D B C D

二、填空題(第17、19、24、25題每空1分，其余每小題2分，共24分)16．220

17．升華

吸熱

凝華

18．.⑴右手感覺熱些

只憑感覺判斷溫度是不可靠的 19．汽化（液化）

液化（汽化）

放熱

吸熱 20．做功

熱傳遞

21．增加，減小

22．負(fù)

同種電荷相互排斥，異種電荷相互吸引 23．電荷（靜電）；吸引

24．閉合 斷開

閉合閉合 25．6.6×108J

三、簡(jiǎn)答題(4分)26．夏天，扇扇子可以加快空氣流動(dòng)（1分），從而加快蒸發(fā)（1分），蒸發(fā)時(shí)吸熱（2分）。所以人會(huì)感到?jīng)隹臁?/p>

27． 0.5 Kg；4.25×103J/（Kg?℃）

28.Q放=mq=0.14kg×1.2×107J/kg=1.68×106J 根據(jù)Q=cmΔt可算出Δt=80℃，但在1標(biāo)準(zhǔn)大氣壓下，水的沸點(diǎn)是100℃，雖然繼續(xù)吸熱，但溫度始終保持100℃不變。所以水升高的溫度應(yīng)為：

Δt=100℃-30℃=70℃ 29．28

36.6 30．（1）煤油

（2）99（3）略 31．如圖

32．并聯(lián)

串聯(lián)

串聯(lián)

并聯(lián)

33．（1）分別放在靠近電風(fēng)扇和遠(yuǎn)離電風(fēng)扇的位置 [增加物質(zhì)]

水（酒精）

[補(bǔ)充步驟]

將兩支溫度計(jì)的玻璃泡同時(shí)蘸取適量的水（酒精）

[分析論證]

靠近電風(fēng)扇的溫度計(jì)的示數(shù)降低較快（遠(yuǎn)離近電風(fēng)扇的溫度計(jì)的示數(shù)降低較慢）

34．電流表 電流

（1）斷開 2）電流

（