第一篇：閱讀理解 -交大網(wǎng)絡(luò)教育-英語(yǔ)第四次在線作業(yè)

閱讀理解請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

The French Revolution broke out in 1789.At the time Francewas in a crisis.Thegovernment was badly run and people’s lives were miserable.King Louis XIV tried to control the national parliament and raise more taxes.But his effort failed.He ordered his troops to Versailles.The people thought that Louis intended to put down the Revolution by force.On July 14,1789, they stormed and took the Bastille, where political prisoners were kept.Ever since that day, July 14 has been the French National Day.Louis tried to flee the country in 1792 to get support from Austriaand Prussia.However, he was caught and put in prison.In September 1792, themonarchy was abolished.In the same year, Louis was executed.A few months later his wife, Marie also had her head cut off.The Revolution of France had frightened the other kings ofEurope.Armies fromAustria andPrussia began to march againstFrance.The French raised republican armies to defend the nation.The Revolution went through a period of terror.Thousands of people lost their lives.In the end, power passed to Napoleon Bonaparte.題目1完成滿分1.00What’s this passage about?

選擇一項(xiàng)：a.King Louis.b.Europe.c.The French Revolution.d.France.題目2完成滿分1.00What was NOT the effect of the Revolution?

選擇一項(xiàng):a.The king tried to control the national parliament.b.Louis’s wife, Marie was killed.c.It brought some impact on the other European kings.d.July 14 has become the French National Day.題目3完成滿分1.00What does the underlined word “abolished ” mean?

選擇一項(xiàng)：a.Put off.b.United.c.Established.d.Ended.題目4完成滿分1.00Which did not happen in 1789?

選擇一項(xiàng)：a.The national economy was developing rapidly.b.King Louis XIV was in power.c.The government wasn’t well run.d.The French Revolution broke out.題目5完成滿分1.00Where were the political prisoners kept?

選擇一項(xiàng)：a.In Austria C.b.In Bastille.c.In Versailles.d.In Prussia.閱讀理解請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

Britain and Franceare separated by theEnglish Channel, a body of water that can be crossed in as few as 20 minutes.But the cultures of the two countries sometimes seem to be miles apart.Last Thursday Britain and France celebrated the 100th anniversary(周年紀(jì)念)of the signing of a friendship agreement called the Entente Cordiality.The agreement marked a new beginning for the countries following centuries of wars and love-hate partnership.But their relationship has been ups and downs over the past century.Just last year, there were fierce disagreements over theIraqwar-which British Prime Minister Tony Blair supported despite French President Jacques Chirac speaking out against it.This discomfort is expressed in Blair and Chirac’s body language at international meetings.While the French leader often greets German Chancellor Gerhard Schroeder with a hug(擁抱)，Blair just receives a handshake.However, some political experts say the war inIraqcould in fact have helped ties.The history of divisions may well be because of the very different ways in which the two sides see the world.But this doesn’t stop 12 million Britons taking holidays inFranceeach year.However, only 3 million French come in the opposite direction.Surveys(調(diào)查)show that most French people reel closer to the Germans than they do to the British.And the research carried out inBritainhas round that only a third of the population believes the French can be trusted.Perhaps this bad feeling comes because the British dislikeFrance’s close relationship withGermany, or because the French are not happy withBritain’s close links with theUS.Whatever the answer is, as both sides celebrate 100 years of “doubtful friendship”, they are at least able to make jokes about each other.Here’s one: What’s the best thing about Britain’s relationship with France? The English Channel

題目6完成滿分1.00For centuries, the relationship between and is __________.選擇一項(xiàng)：a.friendlyb.brotherlyc.a mixture of love and hated.impolite

題目7完成滿分1.00What does the last sentence mean?

選擇一項(xiàng)：a.As long as the English Channel exists, no further disagreement will form between France and

Britain.b.The English Channel can prevent anything unfriendly happening in both France and Britain.c.The English Channel is the largest enemy between France and Britain.d.Franc and Britain are near neighbors, and this will help balance the relationship between

them.題目8完成滿分1.00The war in does _________ to the relationship between and.選擇一項(xiàng)：a.both good and harmb.neither good nor harmc.goodd.harm

題目9完成滿分1.00The British are not so friendly to________ and the French are not so friendly to _________.選擇一項(xiàng)：a.Germany;Germanyb.America;Germanyc.Germany;Americad.America;America

題目10完成滿分1.00________ are more interested in having holidays in _________.選擇一項(xiàng)：a.British people? Germanyb.French people? Britain

c.American people? Britaind.British people? France

閱讀理解請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

Community service is an important component of education here at our university.We encourage all students to volunteer for at least one community activity before they graduate.A new community program called “One On One ” helps elementarystudents who’ve fallen behind.Your education majors might be especially interested in it because it offers the opportunity to do some teaching, that is, tutoring in math and English.You’d have to volunteer two hours a week for one semester.You can choose to help a child with math, English, or both.Half-hour lessons are fine, so you could do a half hour of each subject two days a week.Professor Dodge will act as a mentor to the tutors-he’ll be available to help you with lesson plans or to offer suggestions for activities.He has office hours every Tuesday and Thursday afternoon.You can sign up for the program with him and begin the tutoring next week.I’m sure you’ll enjoy this community service… and you’ll gain valuable experience at the same time.It looks good on your resume, too, showing that you’ve had experience with children and that you care about your community.If you’d like to sign up, or if you have any questions, stop by Professor Dodge’s office this week.題目11完成滿分1.00What should students who are interested in the tutorials do?

選擇一項(xiàng)：a.Talk to professor Dodge.b.Submit a resume to the dean.c.Sign up for a special class.d.Contact the elementary school.題目12完成滿分1.00Whom do you think the speaker addresses?

選擇一項(xiàng)：a.Graduated students.b.Students.c.Residents.d.Faculty.題目13完成滿分1.00What is the purpose of the program that the speaker describes?

選擇一項(xiàng)：a.To help education majors prepare for final exams.b.To offer tutorials to elementary school students.c.To provide funding for a community service project.d.To find jobs for graduating students.題目14完成滿分1.00What is the purpose of the talk?

選擇一項(xiàng)：a.To explain a new requirement for graduation.b.To interest students in a new community program.c.To recruit elementary school teachers for a special program.d.To discuss the problems of elementary school students.題目15完成What does professor Dodge do?

選擇一項(xiàng)：a.He teaches part-time in an elementary school.b.He advises students to participate in certain program.c.He helps students prepare their resumes.d.He observes elementary school students in the classroom.

第二篇：閱讀理解 -交大網(wǎng)絡(luò)教育-英語(yǔ)第四次在線作業(yè)

閱讀理解

請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

The French Revolution broke out in 1789.At the time Francewas in a crisis.The government was badly run and people’s lives were miserable.King Louis XIV tried to control the national parliament and raise more taxes.But his effort failed.He ordered his troops to Versailles.The people thought that Louis intended to put down the Revolution by force.On July 14,1789, they stormed and took the Bastille, where political prisoners were kept.Ever since that day, July 14 has been the French National Day.Louis tried to flee the country in 1792 to get support from Austriaand Prussia.However, he was caught and put in prison.In September 1792, the monarchy was abolished.In the same year, Louis was executed.A few months later his wife, Marie also had her head cut off.The Revolution of France had frightened the other kings ofEurope.Armies fromAustria andPrussia began to march againstFrance.The French raised republican armies to defend the nation.The Revolution went through a period of terror.Thousands of people lost their lives.In the end, power passed to Napoleon Bonaparte.題目1 完成滿分1.00 What’s this passage about? 選擇一項(xiàng)：

a.King Louis.b.Europe.c.The French Revolution.d.France.題目2 完成滿分1.00 What was NOT the effect of the Revolution? 選擇一項(xiàng):

a.The king tried to control the national parliament.b.Louis’s wife, Marie was killed.c.It brought some impact on the other European kings.d.July 14 has become the French National Day.題目3 完成滿分1.00 What does the underlined word “abolished ” mean? 選擇一項(xiàng)：

a.Put off.b.United.c.Established.d.Ended.題目4 完成滿分1.00 Which did not happen in 1789?

選擇一項(xiàng)：

a.The national economy was developing rapidly.b.King Louis XIV was in power.c.The government wasn’t well run.d.The French Revolution broke out.題目5 完成 滿分1.00

Where were the political prisoners kept?

選擇一項(xiàng)：

a.In Austria C.b.In Bastille.c.In Versailles.d.In Prussia.閱讀理解

請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

Britain and Franceare separated by theEnglish Channel, a body of water that can be crossed in as few as 20 minutes.But the cultures of the two countries sometimes seem to be miles apart.Last Thursday Britain and France celebrated the 100th anniversary(周年紀(jì)念)of the signing of a friendship agreement called the Entente Cordiality.The agreement marked a new beginning for the countries following centuries of wars and love-hate partnership.But their relationship has been ups and downs over the past century.Just last year, there were fierce disagreements over theIraqwar-which British Prime Minister Tony Blair supported despite French President Jacques Chirac speaking out against it.This discomfort is expressed in Blair and Chirac’s body language at international meetings.While the French leader often greets German Chancellor Gerhard Schroeder with a hug(擁抱)，Blair just receives a handshake.However, some political experts say the war inIraqcould in fact have helped ties.The history of divisions may well be because of the very different ways in which the two sides see the world.But this doesn’t stop 12 million Britons taking holidays inFranceeach year.However, only 3 million French come in the opposite direction.Surveys(調(diào)查)show that most French people reel closer to the Germans than they do to the British.And the research carried out inBritainhas round that only a third of the population believes the French can be trusted.Perhaps this bad feeling comes because the British dislikeFrance’s close relationship withGermany, or because the French are not happy withBritain’s close links with theUS.Whatever the answer is, as both sides celebrate 100 years of “doubtful friendship”, they are at least able to make jokes about each other.Here’s one: What’s the best thing about Britain’s relationship with France? The English Channel

題目6 完成滿分1.00

For centuries, the relationship between and is __________.選擇一項(xiàng)：

a.friendly b.brotherly

c.a mixture of love and hate d.impolite

題目7 完成滿分1.00 What does the last sentence mean?

選擇一項(xiàng)：

a.As long as the English Channel exists, no further disagreement will form between France and Britain.b.The English Channel can prevent anything unfriendly happening in both France and Britain.c.The English Channel is the largest enemy between France and Britain.d.Franc and Britain are near neighbors, and this will help balance the relationship between them.題目8 完成 滿分1.00 The war in does _________ to the relationship between and.選擇一項(xiàng)：

a.both good and harm b.neither good nor harm c.good d.harm

題目9 完成滿分1.00 The British are not so friendly to________ and the French are not so friendly to _________.選擇一項(xiàng)：

a.Germany;Germany b.America;Germany c.Germany;America d.America;America

題目10 完成滿分1.00 ________ are more interested in having holidays in _________.選擇一項(xiàng)：

a.British people? Germany

b.French people? Britain

c.American people? Britain

d.British people? France

閱讀理解

請(qǐng)從每個(gè)問(wèn)題后的A.B.C.D四個(gè)選項(xiàng)中選出正確選項(xiàng)。

Community service is an important component of education here at our university.We encourage all students to volunteer for at least one community activity before they graduate.A new community program called “One On One ” helps elementary students who’ve fallen behind.Your education majors might be especially interested in it because it offers the opportunity to do some teaching, that is, tutoring in math and English.You’d have to volunteer two hours a week for one semester.You can choose to help a child with math, English, or both.Half-hour lessons are fine, so you could do a half hour of each subject two days a week.Professor Dodge will act as a mentor to the tutors-he’ll be available to help you with lesson plans or to offer suggestions for activities.He has office hours every Tuesday and Thursday afternoon.You can sign up for the program with him and begin the tutoring next week.I’m sure you’ll enjoy this community service… and you’ll gain valuable experience at the same time.It looks good on your resume, too, showing that you’ve had experience with children and that you care about your community.If you’d like to sign up, or if you have any questions, stop by Professor Dodge’s office this week.題目11 完成滿分1.00 What should students who are interested in the tutorials do? 選擇一項(xiàng)：

a.Talk to professor Dodge.b.Submit a resume to the dean.c.Sign up for a special class.d.Contact the elementary school.題目12 完成滿分1.00 Whom do you think the speaker addresses?

選擇一項(xiàng)：

a.Graduated students.b.Students.c.Residents.d.Faculty.題目13 完成滿分1.00 What is the purpose of the program that the speaker describes? 選擇一項(xiàng)：

a.To help education majors prepare for final exams.b.To offer tutorials to elementary school students.c.To provide funding for a community service project.d.To find jobs for graduating students.題目14 完成滿分1.00 What is the purpose of the talk? 選擇一項(xiàng)：

a.To explain a new requirement for graduation.b.To interest students in a new community program.c.To recruit elementary school teachers for a special program.d.To discuss the problems of elementary school students.題目15 完成What does professor Dodge do?

選擇一項(xiàng)：

a.He teaches part-time in an elementary school.b.He advises students to participate in certain program.c.He helps students prepare their resumes.d.He observes elementary school students in the classroom.

第三篇：西安交大網(wǎng)絡(luò)教育《發(fā)電廠電氣部分》在線作業(yè)答案

西交《發(fā)電廠電氣部分》在線作業(yè)、單選題（共 20 道試題，共 40 分。）

1.采用雙母線同時(shí)運(yùn)行的雙母線接線，具有單母線分段接線的特點(diǎn)，（）。A.因此雙母線接線與單母線分段接線是等效的 B.但單母線分段接線具有更大的運(yùn)行靈活性 C.并且兩者的設(shè)備數(shù)量一樣

D.但雙母線接線具有更大的運(yùn)行靈活性 滿分：2 分

2.電壓互感器的額定電壓為3～35kV 時(shí)，一次繞組需經(jīng)（）接入被測(cè)電路。A.隔離開(kāi)關(guān)和接觸器 B.隔離開(kāi)關(guān)和高壓熔斷器 C.斷路器和高壓熔斷器 D.斷路器和限流電抗器 滿分：2 分

3.信號(hào)裝置按用途來(lái)分，不包括（）A.事故信號(hào) B.預(yù)告信號(hào) C.位置信號(hào) D.閃爍信號(hào) 滿分：2 分

4.220kv及以上變電所所用變壓器接線組別宜采用（）A.ygn12 B.Dd12 C.Dyn11 D.Yd11 滿分：2 分

5.中性點(diǎn)經(jīng)消弧線圈接地一般采用（）A.欠補(bǔ)償 B.全補(bǔ)償 C.過(guò)補(bǔ)償 D.不補(bǔ)償 滿分：2 分

6.發(fā)電機(jī)進(jìn)相運(yùn)行會(huì)導(dǎo)致（）A.靜態(tài)穩(wěn)定性降低 B.靜態(tài)穩(wěn)定性提高 C.無(wú)影響 D.無(wú)法確定 滿分：2 分

7.以下不屬于配電裝置設(shè)備的是（）A.開(kāi)關(guān)電器

B.保護(hù)和測(cè)量電器 C.發(fā)電機(jī) D.母線

滿分：2 分 8.為保證電器的動(dòng)穩(wěn)定，在選擇電器時(shí)應(yīng)滿足（）條件。A.動(dòng)穩(wěn)定電流小于通過(guò)電器的最大兩相沖擊短路電流 B.動(dòng)穩(wěn)定電流大于通過(guò)電器的最大兩相沖擊短路電流 C.動(dòng)穩(wěn)定電流大于通過(guò)電器的最大三相沖擊短路電流 D.動(dòng)穩(wěn)定電流小于通過(guò)電器的最大三相沖擊短路電流 滿分：2 分

9.減小矩形母線應(yīng)力的最有效方法是()A.改變母線的布置 B.增大母線截面

C.減少同一相中兩個(gè)相鄰絕緣子間的距離 D.增加母線相間距離 滿分：2 分

10.少油斷路器中的絕緣油（）。A.滅弧介質(zhì)和冷卻介質(zhì)

B.滅弧介質(zhì)及觸頭間隙絕緣介質(zhì)

C.滅弧介質(zhì)以及觸頭間隙、帶電部分與地之間的絕緣介質(zhì) D.以上都不對(duì) 滿分：2 分

11.驗(yàn)算裸導(dǎo)體短路熱效應(yīng)的計(jì)算時(shí)間，采用（）A.主保護(hù)動(dòng)作時(shí)間

B.主保護(hù)動(dòng)作時(shí)間加斷路器全分閘時(shí)間 C.后備保護(hù)動(dòng)作時(shí)間加斷路器全分閘時(shí)間 D.后備保護(hù)動(dòng)作時(shí)間 滿分：2 分

12.三相電動(dòng)力計(jì)算公式中的形狀系數(shù)Kf決定于（）A.導(dǎo)體的機(jī)械強(qiáng)度 B.導(dǎo)體的形狀 C.導(dǎo)體的布置位置

D.導(dǎo)體的形狀及相對(duì)位置 滿分：2 分

13.電力系統(tǒng)中，并聯(lián)電抗器主要用來(lái)（）A.限制故障時(shí)的短路電流 B.吸收電網(wǎng)中的容性無(wú)功 C.給系統(tǒng)提供容性無(wú)功 滿分：2 分

14.以下高壓設(shè)備，一般只在屋外使用的是（）A.高壓斷路器 B.高壓負(fù)荷開(kāi)關(guān) C.高壓隔離開(kāi)關(guān)

D.跌落式高壓熔斷器 滿分：2 分

15.斷路器的開(kāi)斷時(shí)間是指從接受分閘命令瞬間起到（）A.所有電弧觸頭均分離的瞬間為止 B.各極觸頭間電弧最終熄滅為止 C.首相觸頭電弧熄滅為止 D.主觸頭分離瞬間為止 滿分：2 分

16.電能與其他形式的能源相比，其特點(diǎn)不包括（）A.便于大規(guī)模生產(chǎn)和遠(yuǎn)距離輸送 B.方便轉(zhuǎn)換和易于控制 C.可以大量?jī)?chǔ)存 D.損耗小 滿分：2 分

17.線路停電的操作順序是（）

A.先分母線隔離開(kāi)關(guān)，再分線路隔離開(kāi)關(guān)，最后分?jǐn)嗦菲?B.先分線路隔離開(kāi)關(guān)，再分母線隔離開(kāi)關(guān)，最后分?jǐn)嗦菲?C.先分?jǐn)嗦菲?，再分母線隔離開(kāi)關(guān)，最后分線路隔離開(kāi)關(guān) D.先分?jǐn)嗦菲鳎俜志€路隔離開(kāi)關(guān)，最后分母線隔離開(kāi)關(guān) 滿分：2 分

18.多油斷路器中油的用途是（）A.滅弧介質(zhì)和冷卻介質(zhì)

B.滅弧介質(zhì)及觸頭間隙絕緣介質(zhì)

C.滅弧介質(zhì)以及觸頭間隙、帶電部分與地之間的絕緣介質(zhì) D.以上都不對(duì) 滿分：2 分

19.某變電所220千伏配電裝置的布置形式為兩組母線上下布置，兩組母線隔離開(kāi)關(guān)亦上下重疊布置而斷路器為雙列布置，兩個(gè)回路合用一個(gè)間隔。這種布置方式稱為（）。A.半高型布置 B.普通中型布置 C.分相中型布置 D.高型布置 滿分：2 分

20.中性點(diǎn)非直接接地系統(tǒng)中發(fā)生單相金屬性接地時(shí)，故障相對(duì)地電壓為零，非故障相對(duì)地電壓等于（）。A.電源相電壓 B.電源線電壓 C.100 伏 D.380 伏 滿分：2 分

西交《發(fā)電廠電氣部分》在線作業(yè) 試卷總分：100

測(cè)試時(shí)間：--單選題 多選題 判斷題、多選題（共 10 道試題，共 20 分。）

1.電力系統(tǒng)中，電氣設(shè)備選擇的一般條件是（）A.按正常工作條件選擇電氣設(shè)備 B.按短路狀態(tài)選擇電氣設(shè)備 C.按正常的工作條件校驗(yàn) D.按短路狀態(tài)校驗(yàn) 滿分：2 分

2.采用全連分相封閉母線，與敞露母線相比，具有的優(yōu)點(diǎn)包括（）A.供電可靠 B.運(yùn)行安全

C.母線點(diǎn)動(dòng)力減小 D.運(yùn)行維護(hù)工作量小 滿分：2 分

3.對(duì)電力系統(tǒng)運(yùn)行的基本要求有（）A.保證對(duì)用戶供電的可靠性 B.保證電能的良好質(zhì)量 C.保證運(yùn)行的最大經(jīng)濟(jì)性 D.必須有大量的電力存儲(chǔ) 滿分：2 分

4.在超高壓輸電線路上一般要裝設(shè)并聯(lián)高壓電抗器，其作用包括（）A.限制工頻電壓升高 B.降低操作過(guò)電壓

C.消除發(fā)電機(jī)帶長(zhǎng)線出現(xiàn)自勵(lì)磁

D.避免長(zhǎng)距離輸送無(wú)功功率并降低線損 滿分：2 分

5.配電裝置表達(dá)圖中需要按比例繪制的是（）A.平面圖 B.配置圖 C.斷面圖 D.示意圖 滿分：2 分

6.發(fā)熱對(duì)電氣設(shè)備的影響有（）A.使絕緣材料的絕緣性能降低 B.使金屬材料的機(jī)械強(qiáng)度下降 C.使導(dǎo)體接觸部分的接觸電阻增加 D.無(wú)影響 滿分：2 分

7.電氣設(shè)備的運(yùn)行狀態(tài)有哪幾種?()A.運(yùn)行

B.熱狀態(tài)備用中 C.冷狀態(tài)備用中 D.檢修中 滿分：2 分

8.發(fā)電廠的廠用電源，必須供電可靠，且能滿足各種工作狀態(tài)的要求，按功能分為（）A.工作電源 B.啟動(dòng)電源 C.備用電源

D.事故保安電源 滿分：2 分

9.影響輸電電壓等級(jí)發(fā)展的主要原因有（）A.長(zhǎng)距離輸送電能 B.大容量輸送電能

C.節(jié)省基建投資和運(yùn)行費(fèi)用 D.電力系統(tǒng)互聯(lián) 滿分：2 分

10.直流輸電的優(yōu)點(diǎn)有()A.線路造價(jià)低、年運(yùn)行費(fèi)用省 B.沒(méi)有運(yùn)行穩(wěn)定問(wèn)題 C.能限制短路電流

D.調(diào)節(jié)速度快，運(yùn)行可靠 滿分：2 分

西交《發(fā)電廠電氣部分》在線作業(yè) 試卷總分：100

測(cè)試時(shí)間：--單選題 多選題 判斷題、判斷題（共 20 道試題，共 40 分。）

1.中央信號(hào)裝置分為事故信號(hào)和預(yù)告信號(hào)()A.錯(cuò)誤 B.正確

滿分：2 分

2.SF6氣體具有較高絕緣強(qiáng)度的主要原因之一是電負(fù)性。（）A.錯(cuò)誤 B.正確

滿分：2 分

3.加裝旁路母線的唯一目的是不停電檢修出線斷路器。（）A.錯(cuò)誤 B.正確

滿分：2 分

4.將電氣設(shè)備由一種狀態(tài)轉(zhuǎn)為另一種狀態(tài)的操作稱為倒閘操作。（）A.錯(cuò)誤 B.正確

滿分：2 分

5.串聯(lián)電抗器主要用來(lái)限制故障時(shí)的短路電流。()A.錯(cuò)誤 B.正確

滿分：2 分

6.多角形接線主要適用于具有3-5回線路。（）A.錯(cuò)誤 B.正確

滿分：2 分

7.并聯(lián)電抗器主要是用來(lái)吸收電網(wǎng)中的容性無(wú)功。()A.錯(cuò)誤 B.正確

滿分：2 分

8.電流互感器二次側(cè)可以短路，但不能開(kāi)路。()A.錯(cuò)誤 B.正確

滿分：2 分

9.雙回線中任一回線路停電時(shí)，先拉開(kāi)送端開(kāi)關(guān)，然后再拉開(kāi)受端開(kāi)關(guān)。送電時(shí)，先合受端開(kāi)關(guān)，后合送端開(kāi)關(guān)。()A.錯(cuò)誤 B.正確

滿分：2 分

10.廠用電耗電量占發(fā)電廠全部發(fā)電量的百分比，稱為廠用電率。（）A.錯(cuò)誤 B.正確

滿分：2 分

11.電力系統(tǒng)中的發(fā)電機(jī)及各電壓等級(jí)的變壓器的中性點(diǎn)，都是電力系統(tǒng)的中性點(diǎn)。（）A.錯(cuò)誤 B.正確

滿分：2 分

12.電氣設(shè)備選擇的一般條件是按正常工作條件選擇電氣設(shè)備、按短路狀態(tài)校驗(yàn)。（）A.錯(cuò)誤 B.正確

滿分：2 分

13.對(duì)稱三相電路丫連接時(shí)，線電壓為相電壓的√3倍。()A.錯(cuò)誤 B.正確

滿分：2 分

14.發(fā)電廠是把一次能源轉(zhuǎn)換成電能的工廠。（）A.錯(cuò)誤 B.正確

滿分：2 分 15.按電氣設(shè)備裝設(shè)地點(diǎn)不同，配電裝置可分為屋內(nèi)配電裝置和屋外配電裝置。（）A.錯(cuò)誤 B.正確

滿分：2 分

16.內(nèi)橋接線適用于線路較長(zhǎng)、容量較小和變壓器需經(jīng)常切換運(yùn)行方式的裝置中。（）A.錯(cuò)誤 B.正確

滿分：2 分

17.在倒閘操作中，起用母線時(shí)，應(yīng)遵循先充電檢查，后接入使用的原則。（）A.錯(cuò)誤 B.正確

滿分：2 分

18.設(shè)計(jì)配電裝置的帶電部分之間、帶電部分與地或者通道路面之間的距離，均應(yīng)小于規(guī)范中所規(guī)定的安全凈距。（）A.錯(cuò)誤 B.正確

滿分：2 分

19.變電所起著改變電能電壓和分配電能的作用。（A.錯(cuò)誤 B.正確

滿分：2 分

20.事故信號(hào)的主要任務(wù)是在斷路器事故跳閘時(shí)，能及時(shí)地發(fā)出音響，并作相應(yīng)的斷路器燈位置信號(hào)閃光。()A.錯(cuò)誤 B.正確

滿分：2 分

第四篇：西安交大電路在線作業(yè)

一、單選題（共 20 道試題，共 40 分。）1.電感元件L1與L2并聯(lián)，其等效電感L=（D）A.L1+L2 B.L1-L2 C.L1L2 D.L1L2/（L1+L2）

滿分：2 分

2.一根粗細(xì)均勻的電阻絲，阻值為25Ω，將其等分成五段，然后并聯(lián)使用，則其等效電阻是（C）A.1/25Ω B.1/5Ω C.1Ω

D.5Ω

滿分：2 分

3.下列敘述正確的是（C）

A.電容上的電壓越大，則通過(guò)該電容的電流越大

B.電容上的電壓越大，則通過(guò)該電容的電流越大

C.電容電壓的絕對(duì)值在某時(shí)刻達(dá)到最大值時(shí)，此時(shí)電容儲(chǔ)能也最大 D.若電容上某時(shí)刻電壓為零，則該時(shí)刻電容上的電流一定為零

滿分：2 分

4.若C = 1F ,某時(shí)刻電容兩端電壓u為2V，則此時(shí)流過(guò)電容的電流＝（D）。A.2A B.0.5A C.-2A D.不能確定

滿分：2 分

5.若RLC串聯(lián)電路的諧振角頻率為w0，則在角頻率w>w0時(shí)電路呈現(xiàn)（B）A.純電阻性 B.電感性 C.電容性

D.不能確定

滿分：2 分

6.當(dāng)電路中存在受控源時(shí)和在非線性電路中，疊加定理是否適用（A）。A.均適用

B.均不適用

C.前者不適用，后者適用 D.前者適用，后者不適用

滿分：2 分

7.額定值為1W 10Ω的電阻器使用時(shí)通過(guò)電流的限額是（C）。A.0.1A B.0.2A C.0.316A D.0.5A

滿分：2 分 8.R=10Ω,C=1uF與電感L串聯(lián)，接到頻率為1000Hz的正弦電壓源上，為使電阻兩端電壓達(dá)到最高，電感L應(yīng)?。海―）A.1H B.1/2лH C.1/2H D.1/4л2H

滿分：2 分

9.只具有存儲(chǔ)磁場(chǎng)能量特性的電路元件是指（B）A.電阻元件 B.電感元件 C.二極管元件 D.電源元件

滿分：2 分

10.理想電流源的內(nèi)阻為(B).A.0 B.∞

C.有限值

D.由外電路來(lái)確定

滿分：2 分

11.當(dāng)RLC串聯(lián)電路發(fā)生諧振時(shí)，下列（A）是錯(cuò)誤的。A.電流最小 B.電流最大

C.阻抗模值最小 D.電壓電流同相

滿分：2 分

12.集總參數(shù)電路的最大尺寸滿足（A）A.略微大于電磁波波長(zhǎng) B.略微小于電磁波波長(zhǎng) C.遠(yuǎn)遠(yuǎn)大于電磁波波長(zhǎng) D.遠(yuǎn)遠(yuǎn)小于電磁波波長(zhǎng)

滿分：2 分

13.在三相四線制電路中,通常所說(shuō)的220伏和380伏指的是電壓的(C)值 A.平均 B.最大 C.有效 D.瞬時(shí)

滿分：2 分

14.將標(biāo)明220V、100W的燈泡接在電壓低于220V的電源上，燈泡實(shí)際消耗的功率（C）A.仍為100W B.0W C.小于100W D.大于100W

滿分：2 分

15.理想電感元件在某時(shí)刻其電壓值為0，則該時(shí)刻電感上的儲(chǔ)能（A）A.不一定為0 B.一定為0 C.一定不為0 D.無(wú)法確定

滿分：2 分

16.一個(gè)實(shí)際電路的電路模型（B）A.是唯一的

B.在不同應(yīng)用條件下可以有不同的形式 C.是具有某種確定電磁性質(zhì)的真實(shí)元件 D.不具有精確的數(shù)學(xué)定義

滿分：2 分

17.理想電壓源、理想電流源在電路中的功率（A）A.與外電路無(wú)關(guān) B.僅由外電路決定

C.由電源本身與外電路共同決定 D.僅由電源本身決定

滿分：2 分

18.正電荷從元件上電壓的“＋” 極經(jīng)元件運(yùn)動(dòng)到元件的“-”極，電場(chǎng)力做的是（A），這時(shí)，元件（）能量。A.做正功 吸收 B.做正功 釋放

C.做負(fù)功 吸收 D.做負(fù)功 釋放

滿分：2 分

19.下列各部分中，哪一個(gè)不是線性電路的組成部分（D）。A.時(shí)不變線性無(wú)源元件 B.線性受控源 C.獨(dú)立電源 D.集總元件

滿分：2 分

20.電路中理想電壓源兩端電壓（A）A.與外電路無(wú)關(guān) B.由外電路決定

C.為不一定為0的恒定值 D.恒為0

滿分：2 分

二、判斷題（共 30 道試題，共 60 分。）

1.當(dāng)三相電源對(duì)稱，負(fù)載對(duì)稱時(shí)，中線電流為０，因而可以取消中線。B A.錯(cuò)誤

B.正確

滿分：2 分

2.三相負(fù)載三角形聯(lián)接時(shí),測(cè)出各線電流都相等,則各相負(fù)載必然對(duì)稱B A.錯(cuò)誤 B.正確

滿分：2 分

3.電流相等的兩個(gè)元件必屬串聯(lián),電壓相等的兩個(gè)元件必屬并聯(lián)。A A.錯(cuò)誤 B.正確

滿分：2 分

4.僅改變?nèi)鄬?duì)稱電源的頻率是不影響三相對(duì)稱負(fù)載吸收的有功功率的。B A.錯(cuò)誤

B.正確

滿分：2 分

5.若電路有ｎ個(gè)節(jié)點(diǎn)，按不同節(jié)點(diǎn)列寫(xiě)的ｎ－１個(gè)ＫＣＬ方程必然相互獨(dú)立。B A.錯(cuò)誤 B.正確

滿分：2 分

6.若二端網(wǎng)絡(luò)Ｎ與某電流源相聯(lián)時(shí)端電壓為６Ｖ，則在任何情況下二端網(wǎng)絡(luò)Ｎ對(duì)外都可以用６Ｖ電壓源代替。A A.錯(cuò)誤

B.正確

滿分：2 分

7.在對(duì)稱三相電路中,任何時(shí)刻,三相負(fù)載吸收的總的瞬時(shí)功率和平均功率都是一個(gè)常數(shù)。B A.錯(cuò)誤 B.正確

滿分：2 分

8.同一個(gè)一階電路的零狀態(tài)響應(yīng)、零輸入響應(yīng)和全響應(yīng)具有相同的時(shí)間常數(shù).B A.錯(cuò)誤 B.正確

滿分：2 分

9.正弦電流通過(guò)電感或電容元件時(shí),若電流為零則電壓絕對(duì)值最大,若電流最大則電壓為零。B A.錯(cuò)誤 B.正確

滿分：2 分

10.疊加定理不僅適用于線性電路，也適用于非線性電路。如小信號(hào)法解非線性電路就是用疊加定理。A A.錯(cuò)誤

B.正確

滿分：2 分

11.電壓源在電路中一定是發(fā)出功率的。A A.錯(cuò)誤 B.正確

滿分：2 分

12.一個(gè)二端元件的伏安關(guān)系完全是由它本身所確定的，與它所接的外電路毫無(wú)關(guān)系。B A.錯(cuò)誤 B.正確

滿分：2 分 13.戴維南定理只適用于線性電路。但是負(fù)載支路可以是非線性的。B A.錯(cuò)誤 B.正確

滿分：2 分

14.星形聯(lián)接電壓源供電給星形聯(lián)接負(fù)載時(shí),如中點(diǎn)偏移電壓越大, 則負(fù)載各相電壓越小。A A.錯(cuò)誤 B.正確

滿分：2 分

15.采用非關(guān)聯(lián)參考方向時(shí),電感電流比電壓超前π/2rad, 電容電流比電壓滯后 π/2rad。B A.錯(cuò)誤 B.正確

滿分：2 分

16.根據(jù)Ｐ=ＵＩ,對(duì)于額定值220V、40W的燈泡,由于其功率一定，電源電壓越高則其電流必越小。A A.錯(cuò)誤 B.正確

滿分：2 分

17.正弦電流電路中,頻率越高則電感越大,而電容則越小。A A.錯(cuò)誤

B.正確

滿分：2 分

18.理想變壓器即不消耗能量,也不貯存能量.B A.錯(cuò)誤 B.正確

滿分：2 分

19.在電壓近似不變的供電系統(tǒng)中，負(fù)載增加相當(dāng)于負(fù)載電阻減少。B A.錯(cuò)誤

B.正確

滿分：2 分

20.空心變壓器副繞組如接感性負(fù)載，則反映到原繞組的引入電抗一定是容性電抗。B A.錯(cuò)誤 B.正確

滿分：2 分

21.列寫(xiě)ＫＶＬ方程時(shí),每次一定要包含一條新支路才能保證方程的獨(dú)立性。B A.錯(cuò)誤 B.正確

滿分：2 分

22.在Ｒ、Ｃ串聯(lián)電路中，由于時(shí)間常數(shù)與電阻成正比，所以在電源電壓及電容量固定時(shí)，電阻越大則充電時(shí)間越長(zhǎng)，因而在充電過(guò)程中電阻上消耗的電能也越多。A A.錯(cuò)誤 B.正確

滿分：2 分

23.若某元件的伏安關(guān)系為u＝2i+4，則該元件為線性元件。B A.錯(cuò)誤 B.正確

滿分：2 分

24.在計(jì)算電路的功率時(shí)，根據(jù)電壓、電流的參考方向可選用相應(yīng)的公式計(jì)算功率。若選用的公式不同,其結(jié)果有時(shí)為吸收功率，有時(shí)為產(chǎn)生功率。A A.錯(cuò)誤

B.正確

滿分：2 分

25.在ＲＬ串聯(lián)電路與正弦電壓接通時(shí),?電流自由分量的初值總與穩(wěn)態(tài)分量的初值等值反號(hào)。(初始狀態(tài)為零)B A.錯(cuò)誤 B.正確

滿分：2 分

26.電感元件電壓相位超前于電流π/2ｒad,所以電路中總是先有電壓后有電流。A A.錯(cuò)誤

B.正確

滿分：2 分

27.阻值不同的幾個(gè)電阻相串聯(lián)，阻值大的電阻消耗功率小。A A.錯(cuò)誤 B.正確

滿分：2 分

28.若兩個(gè)有源二端網(wǎng)絡(luò)與某外電路相聯(lián)時(shí)，其輸出電壓均為Ｕ，輸出電流均為Ｉ，則兩個(gè)有源二端網(wǎng)絡(luò)具有相同的戴維南等效電路。A A.錯(cuò)誤 B.正確

滿分：2 分

29.理想電流源中的電流是由它本身確定的，與外電路無(wú)關(guān)。因此它的端電壓則是一定的，也與外電路無(wú)關(guān)。A A.錯(cuò)誤 B.正確

滿分：2 分

30.兩只額定電壓為110V的電燈泡串聯(lián)起來(lái)總可以接到220V的電壓源上使用。A A.錯(cuò)誤

B.正確

滿分：2 分

第五篇：交大網(wǎng)絡(luò)教育《馬克思主義基本原理》作業(yè)1：學(xué)習(xí)體會(huì)

馬克思主義哲學(xué)主要對(duì)我們學(xué)生進(jìn)行唯物主義哲學(xué)的基本原理教育，使我們掌握馬克思主義哲學(xué)的基本觀點(diǎn)、立場(chǎng)和方法；幫助我們掌握 馬克思主義的世界觀和方法論；幫助我們樹(shù)立正確的人生觀和價(jià)值 觀；培養(yǎng)學(xué)生運(yùn)用馬克思主義哲學(xué)的觀點(diǎn)和方法去分析問(wèn)題、解決 問(wèn)題的能力，提高我們的政治理論素質(zhì)和思維水平，為我們正確理 解馬克思主義，確立社會(huì)主義信念自覺(jué)堅(jiān)持黨的路線、方針和政策 打下堅(jiān)實(shí)的基礎(chǔ)。馬克思主義哲學(xué)是19世紀(jì)40年代，馬克思和恩格 斯根據(jù)無(wú)產(chǎn)階級(jí)反對(duì)資產(chǎn)階級(jí)的斗爭(zhēng)的實(shí)踐需要，在總結(jié)當(dāng)時(shí)的自 然科學(xué)的最高成果、批判地吸取歷史上一切優(yōu)秀的思想文化成果、特別是德國(guó)古典哲學(xué)的基礎(chǔ)上創(chuàng)立的。馬克思主義哲學(xué)同一切舊哲 學(xué)相比，具有科學(xué)性、階級(jí)性、實(shí)踐性三個(gè)本質(zhì)特征。馬克思主義 哲學(xué)的內(nèi)容：辯證唯物主義和歷史唯物主義。作為一種自然觀,辨

證唯物主義是指自然具有自在性、規(guī)律性、聯(lián)系運(yùn)動(dòng)的矛盾辨證性;作為一種認(rèn)識(shí)論和實(shí)踐論,辨證唯物主義是指正確認(rèn)識(shí)最終來(lái)源于

感官的感覺(jué)和主體的物質(zhì)實(shí)踐活動(dòng),認(rèn)識(shí)和實(shí)踐在認(rèn)識(shí)、實(shí)踐、認(rèn)識(shí)、實(shí)踐的辨證運(yùn)動(dòng)中相互促進(jìn)發(fā)展。