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      《對(duì)數(shù)的概念3》鞏固練習(xí)

      時(shí)間:2019-05-15 02:00:17下載本文作者:會(huì)員上傳
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      第一篇:《對(duì)數(shù)的概念3》鞏固練習(xí)

      漣水中學(xué)高一級(jí)部數(shù)學(xué)學(xué)科教學(xué)案(編號(hào):024)

      《對(duì)數(shù)的概念3》鞏固練習(xí)

      班級(jí)_________姓名_________等第_________日期_________

      一、填空題

      1、(lg2)2?(lg5)2?2lg2?lg5的值為

      2、log281?log216?log220?log230?______________ 33333、①log148?log13?____________ ②lg222512?lg48?_____________

      4、①21?12log52=_________________ ② log2[log2(log381)]=_________________

      lg12lg155、已知lg2?a,lg3?b,則

      二、解答題

      等于_________________

      6、(1)若lg2?0.3010,lg3?0.4771,求lg

      45;

      b(2)已知log189?a,18?5,試用a、b表示log365

      7、已知 2x?43y?12,求63x?2y的值

      《對(duì)數(shù)函數(shù)1》預(yù)習(xí)材料和課堂筆記

      漣水中學(xué)高一級(jí)部數(shù)學(xué)學(xué)科教學(xué)案(編號(hào):024)第1頁(yè) 【知識(shí)點(diǎn)分解與課堂探究】

      一、課前預(yù)習(xí)

      1、對(duì)數(shù)函數(shù)的概念:

      2、對(duì)數(shù)函數(shù)的圖象和性質(zhì):

      例題

      1、求下列函數(shù)的定義域:

      (1)y?log0.2(4?x)(2)y?logax?1(a?0,a?1)

      (3)y?1log9(3x?6)(4)y?log(x?1)(3?x)

      例題

      2、利用對(duì)數(shù)函數(shù)的性質(zhì),比較下列各組數(shù)中兩個(gè)數(shù)的大?。?/p>

      (1)log23.4 log23.8(2)log0.51.8 log0.52.1

      (3)log75 log67(4)log25.1 log15.9 2

      例題

      3、(1)不等式lg(4?3x)?1的解集為。

      (2)不等式loga23?1的解集為。

      例題

      4、求下列函數(shù)的值域:

      2x?log3x ?1?y?log1(x2?4)?2?y?log3(x?9)?3?y?log32

      二、隨堂練習(xí)

      1、解下列方程

      ?1?52x?1?2(2)lg(3x?1)?2

      2、求函數(shù)的f(x)?log1(x?6x?17)值域。

      22漣水中學(xué)高一級(jí)部數(shù)學(xué)學(xué)科教學(xué)案(編號(hào):024)第2頁(yè)

      第二篇:對(duì)數(shù)的概念教學(xué)反思

      對(duì)數(shù)的概念教學(xué)反思

      正確理解對(duì)數(shù)定義中底數(shù)的限制,為以后對(duì)數(shù)函數(shù)定義域的確定作準(zhǔn)備。同時(shí)注意對(duì)數(shù)的書(shū)寫(xiě),避免因書(shū)寫(xiě)不規(guī)范而產(chǎn)生的錯(cuò)誤。本教學(xué)設(shè)計(jì)先由引例出發(fā),創(chuàng)設(shè)情境,激發(fā)學(xué)生對(duì)對(duì)數(shù)的興趣;在講授新課部分,通過(guò)結(jié)合多媒體教學(xué)以及一系列的課堂探究活動(dòng),加深學(xué)生對(duì)對(duì)數(shù)的認(rèn)識(shí);最后通過(guò)課堂練習(xí)來(lái)鞏固學(xué)生對(duì)對(duì)數(shù)的掌握。

      第三篇:高一數(shù)學(xué)教案:對(duì)數(shù)的概念1

      3eud教育網(wǎng) http://www.3edu.net 百萬(wàn)教學(xué)資源,完全免費(fèi),無(wú)須注冊(cè),天天更新!

      題:2.3.1 對(duì)數(shù)-對(duì)數(shù)的概念

      教學(xué)目的:1.理解對(duì)數(shù)的概念,能夠進(jìn)行對(duì)數(shù)式與指數(shù)式的互化;

      2.滲透應(yīng)用意識(shí),培養(yǎng)歸納思維能力和邏輯推理能力,提高數(shù)學(xué)發(fā)現(xiàn)能力。

      教學(xué)重點(diǎn):對(duì)數(shù)的概念

      教學(xué)難點(diǎn):對(duì)數(shù)概念的理解.授課類型:新授課 課時(shí)安排:1課時(shí)

      教 具:多媒體、背投

      教材分析:17世紀(jì)初,為了解決很多位數(shù)的數(shù)字繁雜的計(jì)算而產(chǎn)生了對(duì)數(shù)。現(xiàn)在用對(duì)數(shù)進(jìn)行大數(shù)的計(jì)算已被新的運(yùn)算工具所取代,因此中學(xué)對(duì)于傳統(tǒng)的對(duì)數(shù)內(nèi)容進(jìn)行了大量的刪減。但對(duì)數(shù)函數(shù)應(yīng)用還是廣泛的,后續(xù)的教學(xué)內(nèi)容也經(jīng)常用到。

      本節(jié)講對(duì)數(shù)的定義和運(yùn)算性質(zhì)的目的主要是為了學(xué)習(xí)對(duì)數(shù)函數(shù)。對(duì)數(shù)概念與指數(shù)概念有關(guān),是在指數(shù)概念的基礎(chǔ)上定義的,在一般對(duì)數(shù)定義logaN(a?0,a?1)之后,給出兩個(gè)特殊的對(duì)數(shù):一個(gè)是當(dāng)?shù)讛?shù)a?10時(shí),稱為常用對(duì)數(shù),簡(jiǎn)記作lgN?b;另一個(gè)是底數(shù)a?e(一個(gè)無(wú)理數(shù))時(shí),稱為自然對(duì)數(shù),簡(jiǎn)記作lnN?b。這樣既為學(xué)生以后學(xué)習(xí)或讀有關(guān)的科技書(shū)給出了初步知識(shí),也使教材大大簡(jiǎn)化,只保留到學(xué)習(xí)對(duì)數(shù)函數(shù)知識(shí)夠用即可。教學(xué)過(guò)程:

      一、復(fù)習(xí)引入:

      在第2.2.2節(jié)的例4中,我們研究了一種放射性物質(zhì)不斷變化為其他物質(zhì)的過(guò)程,設(shè)該物質(zhì)最初的質(zhì)量是1,則經(jīng)過(guò)x年,該物質(zhì)的剩留量y?0.84,由此,知道了經(jīng)過(guò)的時(shí)間x,就能求出的該物質(zhì)的剩留量y;反過(guò)來(lái),知道了該物質(zhì)的剩留量y,怎樣求出所經(jīng)過(guò)的時(shí)間x呢?

      ●特別地,經(jīng)過(guò)多少年這種物質(zhì)的剩留量為原來(lái)的一半?

      二、新授內(nèi)容:

      上述問(wèn)題也就是求滿足0.84?0.5中的x,此時(shí)問(wèn)題就轉(zhuǎn)化為已知底數(shù)和冪的值求指數(shù)。定義:一般地,如果 a?a?0,a?1?的b次冪等于N, 即 a?N,那么就稱b是以a為

      bxx底 N的對(duì)數(shù),記作 logaN?b,其中a叫做對(duì)數(shù)的底數(shù),N叫做真數(shù)。

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      b由對(duì)數(shù)的定義可知,a?N與b?logaN兩個(gè)等式所表示的是a,b,N三個(gè)量之間的11同一關(guān)系。例如:3?9?log39?2;log42??42?2

      22根據(jù)對(duì)數(shù)的定義可知,要解決本節(jié)開(kāi)頭提出的問(wèn)題,就只要計(jì)算log0.840.5的值?!駥?duì)數(shù)式logaN的理解

      ⑴是一種運(yùn)算:已知底a和冪N求指數(shù)的運(yùn)算,即求關(guān)于x的方程a?N的解 ⑵是一個(gè)記號(hào):用和冪N表示對(duì)應(yīng)的指數(shù)的記號(hào),是指數(shù)式a?N的另一種等價(jià)表示形式logaN?x

      ●⑴底a的要求大于零不為1。

      ⑵負(fù)數(shù)與零沒(méi)有對(duì)數(shù)(∵在指數(shù)式中N?0)⑶loga1?0,logaa?1

      ∵對(duì)任意 a?0且 a?1, 都有 a?1 ∴l(xiāng)oga1?0 同樣易知: logaa?1

      三、講解范例:

      例1.將下列指數(shù)式改寫(xiě)成對(duì)數(shù)式:

      ⑴2?16; ⑵3a4xx0?3?b1; 27⑶5?20; ⑷()?0.45 解:⑴log216?4 ⑵log327??3

      ⑶log520?a ⑷log10.45?b

      212例2.將下列對(duì)數(shù)式改寫(xiě)成指數(shù)式:

      ⑴log5125?3; ⑵log133??2; ⑶log10a??1.699

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      解:⑴53?125 ⑵(1?2)?3 ⑶10?1.699?a 3●常用對(duì)數(shù):我們通常將以10為底的對(duì)數(shù)叫做常用對(duì)數(shù)。為了簡(jiǎn)便, N的常用對(duì)數(shù)log10N簡(jiǎn)記作lgN?b。如log10a??1.699簡(jiǎn)記作lga??1.699

      自然對(duì)數(shù):在科學(xué)技術(shù)中常常使用以無(wú)理數(shù)e?2.71828……為底的對(duì)數(shù),以e為底的對(duì)數(shù)叫自然對(duì)數(shù),為了簡(jiǎn)便,N的自然對(duì)數(shù)logeN簡(jiǎn)記作lnN?b。例如:loge3簡(jiǎn)記作ln3;loge10簡(jiǎn)記作ln10

      例3.求下列各式的值:

      ⑴log264; ⑵log927 解:⑴由2?64,得log264?6

      ⑵設(shè)x?log927,則 9?27,,即3例4.求下列各式中的x

      ⑴log8x??x62x?33, 得x?33,所以log927? 222⑵logx27? 34⑶log2(log3x)?1 ⑷log5(lnx)?0

      例5.證明對(duì)數(shù)恒等式:alogaN?N

      logaNb●如果把 a?N 中的 b寫(xiě)成 logaN, 則有 a?N

      四、練習(xí):

      五、小結(jié) 本節(jié)課學(xué)習(xí)了以下內(nèi)容:

      ⑴對(duì)數(shù)的定義,⑵指數(shù)式與對(duì)數(shù)式互換 ⑶求對(duì)數(shù)式的值

      六、課后作業(yè):

      七、板書(shū)設(shè)計(jì)(略)

      八、課后記:

      3eud教育網(wǎng) http://www.3edu.net 教學(xué)資源集散地??赡苁亲畲蟮拿赓M(fèi)教育資源網(wǎng)!3eud教育網(wǎng) http://www.3edu.net 百萬(wàn)教學(xué)資源,完全免費(fèi),無(wú)須注冊(cè),天天更新!

      網(wǎng)!3eud教育網(wǎng) http://www.3edu.net 教學(xué)資源集散地??赡苁亲畲蟮拿赓M(fèi)教育資源

      第四篇:名詞性從句鞏固練習(xí)3(精選)

      名詞性從句鞏固練習(xí)

      1.____he does has nothing to do with me.A.whateverB.No matter whatC.ThatD.If

      2.The manager came over and asked the customer how____

      A.did the quarrel came aboutB.the quarrel had come about

      C.has the quarrel come aboutD.had the quarrel come about

      3.Energy is ____makes thingwork..A.whatB.somethingC.anythingD.that

      4.Information has been putforward ____ more middle school graduates will be admitted into

      universities.A.whileB.thatC.whenD.as

      5.This is ___the shenzhou V Spaceship landed.A.thereB.in whichC.whereD.when

      6.They have no idea at all____.A.where he has goneB.where did he go

      C.which place has he goneD.where has he gone

      7.The doctor did a lot to reduce the patient’s fear ____he would die of the disease.A.thatB.whichC.of whichD.of that

      8.The order came ___the soldiers ____the small village the next morning.A.that;had to leaveB.that;should leave

      C./;must leaveD.when;should leave

      9.___is no possibility ____Bob can win the first prize in the match.A.There;thatB.It;thatC.there;whetherD.It;whether

      10.The question came up at the meeting_____ we had enough money for our research.A.thatB.whichC.whetherD.if

      11.Is _____he said really true?

      A.thatB.whatC.whyD.whether

      12.____the meeting should last two days or three days doesn’t matter.A.ThatB.WhetherC.IfD.Where

      13.It worried her a bit _____her hair was turning gray.A.whileB.ifC.thatD.for

      14._____more countries can use natural energy in the future remains to be seen.A.WhetherB.ThisC.whoD.If

      15.____he will go to work in a mountain village surprises all of us.A.WhatB.ThatC.WhetherD.If

      16.____you don’t like him is none of my business.A.WhatB.ThatC.WhoD.How

      17.____all the inventions have in common is ____they have succeeded.A.What;whatB.That;thatC.what;thatD.That;what

      18.____appeared to me that he enjoyed the food very much.A.WhatB.ItC.All thatD.That

      19.It is widely ______that smoking can cause cancer.A.believedB.thinkC.sayD.hoped

      20.____caused the accident is still a complete mystery.A.WhatB.ThatC.HowD.Where

      21.____he always serves the people very well is known.A.WhatB.ThatC.WhichD.Who

      22.____has passed the test will get a prize.A.WhoeverB.No mater whoC.WhomeverD.Who

      23.Is____ true that the famous scientist will give us a lecture next week?

      A thatB itC hisD he

      24.It has not been decided ___ they will leave for New York.A.whenB whyC thatD what

      25.Obviously___ we do morning exercises every day ___ us good.A.that doB.if;doC what;doesD.that;doseIt is said____ ____ was all ___ he said.A that;that;thatB what;what;whatC that;which;whatD that;that;which

      27___ gets home first is to cook the supper.A.WhoB WhomC.Those whoD.Whoever

      28___ moved us most was___ he looked after the old man for more than twenty years.A.That;thatB.What;thatC What;whatD.That;what

      29.___ you did it is not known to all.A.WhoB.WhatC.HowD.Which

      30.___ you do should be well done.A HowB.ThatC.WhateverD Why

      31.The reason I plan to go is___ she will be disappointed if I don’t.A.becauseB.thatC.thanks toD.what

      32.What time do you think__?

      A.will Tom come backB.Tom will come backC.is Tom coming backD.can Tom get here

      33.The teacher said that light___ faster than sound.A.Has traveledB.traveledC.had traveledD.travels

      34..___ is still a question___ will win.A.It;thatB.It;whoC.That;whoD.This;that

      35.If you know___ it was that wrote A Tale of Two Cities, raise your hand.A.whomB.whichC.whoD.that

      36.In some countries,___ are called “public schools” are not owned by the state.A.thatB.whichC.asD.what

      37.Thinking___ you know___ in fact you don’t is a terrible mistake.A.that;thatB.what;whatC.that;whatD.what that

      38.Whether ways will be found to stop pollution or not is just___ worries the public.A.whyB.whichC.thatD.what

      39.Why don’t you bring___ to his attention that you are too busy to do it?

      A.thatB.whatC.thatD.it

      40.___ David says sounds right to Helen.That’s why she has made up her mind to live with him___ happens.A.whatever;whateverB.No matter what;whatever

      C.No matter what;No matter whatD.Whatever;however

      41.That is___ I was born and grew up.A.ThereB.in whichC.whereD.the place

      42.___ she was invited to the ball made her very happy.A.WhatB.ThatC.WhenD.Because

      43.___ we are doing has never been done before.A.ThatB.WhatC.WhichD.Whether

      44.---Have you found your book yet?---No, I’m not sure___ I could have left it.A.whetherB.whereC.whenD.why

      45.The doctor couldn’t answer the question___ the patient could survive that night.A.ifB.thatC.whetherD.what

      46.I firmly believe___ he said at the meeting was right.A.thatB.whichC.that whatD.what that

      47.---What were you trying to prove to the police?---___ I was last night.A.ThatB.WhenC.WhereD.What

      48.I think, though I could be mistaken, __ he liked me.A.whoB.whichC.thatD.what

      49.At the meeting, we discussed___ we should employ more workers.A.ifB.whetherC.thatD./

      50.After___ seemed like hours he came out with a bitter smile.A.whichB.itC.whatD.that

      答案1—5 ABABC6—10 AABAC11—15 BBCAB16—20 BCBAA21—25 BABAD

      26—30 ADBCC 31—35 BBDBC36—40 DCDDA41—45 CBBBC46—50 CCCBC

      1.The doctor did a lot to reduce the patient’s fear ____he would die of the disease.A.thatB.whichC.of whichD.of that

      2.The idea ___ we should have more industry in this area is a good one.A.thatB.whichC.whatD.how

      3.The suggestion ____we have a group of these records printed as soon as possible was accepted

      by the committee.A.howB.whichC.thatD.what

      4.He told me the news ____ the Queen would visit China the next month.A.thatB.whichC.itD.whether

      5.The fact troubles me much ___ I have been unable to pass the driving test up to now.A.whichB.becauseC.whyD.that

      6.The mother didn’t know to blame for the broken glass as it happened while she was out.A.who

      B.whenC.howD.what(NMF, T 2002)

      7.―I think it’s going to be a big problem.―Yes, it could be.―I wonderwe can do about it.(NMET 02)A.ifB.howC.whatD.that

      8.When you answer questions in a job interview, please remember the golden rule: Always give the monkey exactlyhe wants.(上海2002春)

      A.whatB.whichC.whenD.that

      9.Jack said to meet the American friends.A.he is pleaseB.what he was pleasedC.that he was pleasedD.which he pleased

      10.fewer and fewer students showed interest in her lessons.A.What;whyB.That;whatC.What;becauseD.Why;that:

      11.He often writes to us expressing his thought _____ one day he’ll come to join us.A.whichB.thatC.whatD.whether

      12.He made a suggestion ____ the English test be put off until next Wednesday.A.whichB.whatC.thatD.whether

      13.The news _____ the football team won the game made us happy.A.thatB.whichC.in whichD.what

      14.The mere fact______ most people believe nuclear war would be madness does not mean thatit will not occur.A.whatB.whichC.thatD.why

      15.―Do you really believe there is human race in outer space?

      ---So far there is no proof ____ people from other planets do exist.A.whichB.howC.whatD.that

      16.---I drove to Zhuhai for the air show last week.---Is that you has a few days off?

      A.whyB.whenC.whatD.where

      17.has helped to save the drowning girl is worth praising.A.WhoB.The oneC.AnyoneD.Whoever

      18.caused the accident is still a complete mystery.A.WhatB.ThatC.HowD.Where

      答案:1.A A C A D6.A C A C A11.BCACD16.ADA

      第一部分:基礎(chǔ)題

      1._______ makes his shop different is that it offers more personal services.A.WhatB.WhoC.WhateverD.Whoever

      2.—It’s thirty years since we last met.—But I still remember the story, believe it or not, _______ we got lost on a rainy night.A.whichB.thatC.whatD.when

      3.See the flags on top of the building? That was _______ we did this morning.A.whenB.whichC.whereD.What

      4.—Could you do me a favor?—

      A.whichB.whicheverC.whatD.whatever

      5.These shoes look very good.I wonder _______.A.how much cost they areB.how much do they cost

      C.how much they costD.how much are they cost

      6.Doris' success lies in the fact _______ she is co-operative and eager to learn from others.A.whichB.thatC.whenD.why

      7.Mary wrote an article on _______ the team had failed to win the game.A.whyB.whatC.whoD.that

      8.Do you have any idea _______ is actually going on in the classroom?

      A.thatB.whatC.asD.which

      9.—Why does she always ask you for help?—There is no one else _______, is there?

      A.who to turn toB.she can turn to C.for whom to turnD.for her to turn

      10.Elephants have their own way to tell the shape of an object and ___ it is rough or smooth.A./B.whetherC.howD.what

      11.Danny left word with my secretary _______ he would call again in the afternoon.A.whoB.thatC.asD.which

      12.Mum is coming.What present _______ for your birthday?

      A.you expect she has gotB.you expect has she got

      C.do you expect she has gotD.do you expect has she got

      13.The way he did it was different ________ we were used to.A.in whichB.in whatC.from whatD.from which

      14.Great changes have taken place in that school.It is no longer _______ it was 20 years ago, _______ it

      was so poorly equipped.A.what;whenB.that;whichC.what;whichD.which;that

      15.Some researchers believe that there is no doubt ________ a cure for AIDS will be found.A.whichB.thatC.whatD.whether

      第二部分:強(qiáng)化題

      1.We haven’t settled the question of _______ it is necessary for him to study abroad.A.ifB.whereC.whetherD.that

      2.A warm thought suddenly came to me _______I might use the pocket money to buy some flowers for my mother’s birthday.A.ifB.whenC.thatD.which

      3.There is much chance _______ Bill will recover from his injury in time for the race.A.thatB.whichC.untilD.if

      4.Please remind me _______ he said he was going.I may be in time to see him off.A.whereB.whenC.howD.what

      5.We saw several natives advancing towards our party, and one of them came up to us._______ we

      gave some bells and glasses.A.to whichB.to whomC.with whomD.with which

      6.With his work completed, the businessman stepped back to his seat, feeling pleased _______ he was

      a man of action.A.whichB.thatC.whatD.whether

      A.No matter whatB.No matter whichC.WhateverD.Whichever

      that makes him so excited.A.why it doesB.what he doesC.how it isD.what it is

      9.___ is our belief that improvements in health care will lead to a stronger , more prosperouseconomy.A.AsB.ThatC.ThisD.It

      10.Nobody believed his reason for being absent form the class ______ he had to meet his

      uncle at the airport.A.whyB.thatC.whereD.because

      11.The shopkeeper did not want to sell for _______ he thought was not enough.A.whereB.howC.whatD.which

      12.He noticed that the straight part of the dance was different in the afternoon from _______ it had

      been in the morning.A.thatB.whereC.whatD.which

      13.I’d like to work with _______ is honest and easy to get on with.(2006年山東模擬題)

      A.whoB.whoeverC.whomeverD.no matter who

      14.When you are reading, make a note of _______ you think is of great importance.A.whichB.thatC.whatD.when

      15.—Can we get everything ready by the weekend?

      —It all depends on _______ we can get Mr.Green’s cooperation.A.thatB.whatC.whetherD.if基礎(chǔ)題:1.ABDCC6.BABBB11.BCCAB

      強(qiáng)化題:1.CCABB6.BDDDB11.CCBCC

      第五篇:《風(fēng)箏》鞏固練習(xí)

      讓更多的孩子得到更好的教育

      風(fēng)箏

      基礎(chǔ)知識(shí)識(shí)記

      1.根據(jù)拼音寫(xiě)漢字或給加點(diǎn)字注音。

      風(fēng)zhēng()溫xīn()丫chà()寂mò()

      憔cuì()點(diǎn)zhuì()嫌wù()nüè()殺

      吐蕾()瑟()縮墮()苦心孤詣()....

      2.結(jié)合句意解釋下列加紅詞語(yǔ)。

      (1)伶仃地顯出憔悴可憐模樣。....

      伶仃:憔悴:

      (2)我倒不如躲到肅殺的嚴(yán)冬中去吧。..

      肅殺:

      (3)這樣苦心孤詣地來(lái)偷做沒(méi)出息孩子的玩藝。....

      苦心孤詣:

      3.魯迅(1881—1936),現(xiàn)代著名________家、________家和________家。原名________,字豫才,浙江紹興人。1918年,首次用“魯迅”的筆名,發(fā)表中國(guó)現(xiàn)代文學(xué)史上

      讓更多的孩子得到更好的教育的好時(shí)光。矚望那長(zhǎng)長(zhǎng)的輕輕抖動(dòng)的風(fēng)箏線,竟絲絲縷縷牽出了我的童年。

      ②在鄉(xiāng)下,三月的剪剪輕風(fēng)還殘留著冬的料峭。我們這些顛跑在蓊郁麥田里的孩子,摔打慣了,是不知道什么叫冷的。何況又常把嬉笑系在風(fēng)箏線上,即便有些寒意,也早被如火的童心熔化掉,讓野氣的笑聲趕跑了。

      ③人們都說(shuō):男孩子手笨,沒(méi)女孩子手巧,這豈不有些重女輕男了么!不是吹,我們男孩雖未能繡出花團(tuán)錦簇的衣冠,卻從手中飛出這巧奪天工的風(fēng)箏!嗨,做風(fēng)箏可不像女孩子學(xué)針線,有的是時(shí)間,有的是專人指教。我們男孩子可整天像賊攆一般忙得腳不沾地。常趁放學(xué)后的間隙,三五個(gè)湊在一處無(wú)人知曉的角隅,或干脆跑到野外去,因?yàn)榧依锎笕耸遣蛔屛覀償[弄風(fēng)箏的。

      ④我們偷偷找來(lái)竹篾,且要綠皮的有韌性的,猶如女孩子繡花挑線一般仔細(xì)。我們把竹篾放到火堆上烤了,再?gòu)澇晒频暮烷镛A似的等幾何形狀,拼在一起,悉心系好。就變成了形態(tài)各異的風(fēng)箏的骨架。然后幾顆小腦袋抵在一起,嘰嘰喳喳商量一陣,就各出心裁地用彩筆在糊好的桑皮紙上勾勒一通,便給它們穿上了斑斕的衣衫。這完全可以與女孩子織成的錦繡相媲美。然后用大團(tuán)大團(tuán)的線做放線,一頭系在鳳箏上,一頭纏在一個(gè)線拐子上。這些線來(lái)得可不易呢,是我們這些“男子漢”低三下四,求爺告奶,甚至向小姑娘一連串喊上十聲“好姐姐”才弄到手的。

      ⑤好了!抬起你因做風(fēng)箏而勾得酸了的頭,開(kāi)始放吧???!風(fēng)箏!風(fēng)箏!全是風(fēng)箏!這些大大小小造型生動(dòng)的風(fēng)箏,從遼闊的麥田里,迤邐的大道旁,瀲滟的堤塘邊冉冉升起——被底下幼稚的歡聲笑語(yǔ)吹著,騰騰熱氣捧著,悠悠飛向空中,去親吻白云。好似爭(zhēng)艷的奇葩,掛彩的氣球。我們的心醉了。⑥更叫絕的要數(shù)晚上。皓月高懸中天,大地一片靜謐。夜色朦朧。我們幾個(gè)小伙伴溜出來(lái)一嘰咕,便帶了心愛(ài)的風(fēng)箏到村頭田邊。風(fēng)箏紙是涂了閃金光的東西,還要想法把一段蠟頭或一捻蘸了油的棉絮系在尾巴上,放飛時(shí)一點(diǎn)燃便像飛機(jī)尾翼上的信號(hào)燈。這通常極難放,因野外有風(fēng),蠟燭又不頂風(fēng),所以總是熄滅。但偶有做成功的,那風(fēng)箏放起來(lái)就別有情趣,“信號(hào)燈”明滅閃爍,隨風(fēng)箏飄飄灑灑,也把一顆顆童心送上神秘的高空,如醉如癡。

      ⑦風(fēng)箏也有賭氣的時(shí)候,任你如何擺布,它總要往地上栽。這時(shí)的小伙伴決不會(huì)張飛似的環(huán)眼圓睜,一腳踏翻它的,而總是小心翼翼地檢查一番,找出毛病,對(duì)癥下藥。隨著歡呼聲,風(fēng)箏重又飄然升起。當(dāng)放到得意處,猛不防風(fēng)箏也會(huì)斷線,搖頭晃腦地越飄越遠(yuǎn)。我們拉著斷了的風(fēng)箏線,不勝惋惜??⑧韶光如流。雖說(shuō)童年已悄然離去,可風(fēng)箏這根若有若無(wú)的線,卻每每牽著我的童年。我常想撿回那逝去的童年!

      ⑨啊,我的鵝黃色的童年!

      13.

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