第一篇：閱讀理解 -交大網絡教育-英語第四次在線作業

閱讀理解請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：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: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：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：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：a.In Austria C.b.In Bastille.c.In Versailles.d.In Prussia.閱讀理解請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：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：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：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：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：a.British people? Germanyb.French people? Britain

c.American people? Britaind.British people? France

閱讀理解請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：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：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：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：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：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 -交大網絡教育-英語第四次在線作業

閱讀理解

請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：

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:

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：

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：

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：

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

請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：

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：

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：

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：

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：

a.British people? Germany

b.French people? Britain

c.American people? Britain

d.British people? France

閱讀理解

請從每個問題后的A.B.C.D四個選項中選出正確選項。

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：

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：

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：

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：

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：

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：西安交大網絡教育《發電廠電氣部分》在線作業答案

西交《發電廠電氣部分》在線作業、單選題（共 20 道試題，共 40 分。）

1.采用雙母線同時運行的雙母線接線，具有單母線分段接線的特點，（）。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行靈活性 C.并且兩者的設備數量一樣

D.但雙母線接線具有更大的運行靈活性 滿分：2 分

2.電壓互感器的額定電壓為3～35kV 時，一次繞組需經（）接入被測電路。A.隔離開關和接觸器 B.隔離開關和高壓熔斷器 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.信號裝置按用途來分，不包括（）A.事故信號 B.預告信號 C.位置信號 D.閃爍信號 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.中性點經消弧線圈接地一般采用（）A.欠補償 B.全補償 C.過補償 D.不補償 滿分：2 分

6.發電機進相運行會導致（）A.靜態穩定性降低 B.靜態穩定性提高 C.無影響 D.無法確定 滿分：2 分

7.以下不屬于配電裝置設備的是（）A.開關電器

B.保護和測量電器 C.發電機 D.母線

滿分：2 分 8.為保證電器的動穩定，在選擇電器時應滿足（）條件。A.動穩定電流小于通過電器的最大兩相沖擊短路電流 B.動穩定電流大于通過電器的最大兩相沖擊短路電流 C.動穩定電流大于通過電器的最大三相沖擊短路電流 D.動穩定電流小于通過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.滅弧介質和冷卻介質

B.滅弧介質及觸頭間隙絕緣介質

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

11.驗算裸導體短路熱效應的計算時間，采用（）A.主保護動作時間

B.主保護動作時間加斷路器全分閘時間 C.后備保護動作時間加斷路器全分閘時間 D.后備保護動作時間 滿分：2 分

12.三相電動力計算公式中的形狀系數Kf決定于（）A.導體的機械強度 B.導體的形狀 C.導體的布置位置

D.導體的形狀及相對位置 滿分：2 分

13.電力系統中，并聯電抗器主要用來（）A.限制故障時的短路電流 B.吸收電網中的容性無功 C.給系統提供容性無功 滿分：2 分

14.以下高壓設備，一般只在屋外使用的是（）A.高壓斷路器 B.高壓負荷開關 C.高壓隔離開關

D.跌落式高壓熔斷器 滿分：2 分

15.斷路器的開斷時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，其特點不包括（）A.便于大規模生產和遠距離輸送 B.方便轉換和易于控制 C.可以大量儲存 D.損耗小 滿分：2 分

17.線路停電的操作順序是（）

A.先分母線隔離開關，再分線路隔離開關，最后分斷路器 B.先分線路隔離開關，再分母線隔離開關，最后分斷路器 C.先分斷路器，再分母線隔離開關，最后分線路隔離開關 D.先分斷路器，再分線路隔離開關，最后分母線隔離開關 滿分：2 分

18.多油斷路器中油的用途是（）A.滅弧介質和冷卻介質

B.滅弧介質及觸頭間隙絕緣介質

C.滅弧介質以及觸頭間隙、帶電部分與地之間的絕緣介質 D.以上都不對 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，兩組母線隔離開關亦上下重疊布置而斷路器為雙列布置，兩個回路合用一個間隔。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.中性點非直接接地系統中發生單相金屬性接地時，故障相對地電壓為零，非故障相對地電壓等于（）。A.電源相電壓 B.電源線電壓 C.100 伏 D.380 伏 滿分：2 分

西交《發電廠電氣部分》在線作業 試卷總分：100

測試時間：--單選題 多選題 判斷題、多選題（共 10 道試題，共 20 分。）

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

2.采用全連分相封閉母線，與敞露母線相比，具有的優點包括（）A.供電可靠 B.運行安全

C.母線點動力減小 D.運行維護工作量小 滿分：2 分

3.對電力系統運行的基本要求有（）A.保證對用戶供電的可靠性 B.保證電能的良好質量 C.保證運行的最大經濟性 D.必須有大量的電力存儲 滿分：2 分

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

C.消除發電機帶長線出現自勵磁

D.避免長距離輸送無功功率并降低線損 滿分：2 分

5.配電裝置表達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.發熱對電氣設備的影響有（）A.使絕緣材料的絕緣性能降低 B.使金屬材料的機械強度下降 C.使導體接觸部分的接觸電阻增加 D.無影響 滿分：2 分

7.電氣設備的運行狀態有哪幾種?()A.運行

B.熱狀態備用中 C.冷狀態備用中 D.檢修中 滿分：2 分

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

D.事故保安電源 滿分：2 分

9.影響輸電電壓等級發展的主要原因有（）A.長距離輸送電能 B.大容量輸送電能

C.節省基建投資和運行費用 D.電力系統互聯 滿分：2 分

10.直流輸電的優點有()A.線路造價低、年運行費用省 B.沒有運行穩定問題 C.能限制短路電流

D.調節速度快，運行可靠 滿分：2 分

西交《發電廠電氣部分》在線作業 試卷總分：100

測試時間：--單選題 多選題 判斷題、判斷題（共 20 道試題，共 40 分。）

1.中央信號裝置分為事故信號和預告信號()A.錯誤 B.正確

滿分：2 分

2.SF6氣體具有較高絕緣強度的主要原因之一是電負性。（）A.錯誤 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.錯誤 B.正確

滿分：2 分

4.將電氣設備由一種狀態轉為另一種狀態的操作稱為倒閘操作。（）A.錯誤 B.正確

滿分：2 分

5.串聯電抗器主要用來限制故障時的短路電流。()A.錯誤 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.錯誤 B.正確

滿分：2 分

7.并聯電抗器主要是用來吸收電網中的容性無功。()A.錯誤 B.正確

滿分：2 分

8.電流互感器二次側可以短路，但不能開路。()A.錯誤 B.正確

滿分：2 分

9.雙回線中任一回線路停電時，先拉開送端開關，然后再拉開受端開關。送電時，先合受端開關，后合送端開關。()A.錯誤 B.正確

滿分：2 分

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

滿分：2 分

11.電力系統中的發電機及各電壓等級的變壓器的中性點，都是電力系統的中性點。（）A.錯誤 B.正確

滿分：2 分

12.電氣設備選擇的一般條件是按正常工作條件選擇電氣設備、按短路狀態校驗。（）A.錯誤 B.正確

滿分：2 分

13.對稱三相電路丫連接時，線電壓為相電壓的√3倍。()A.錯誤 B.正確

滿分：2 分

14.發電廠是把一次能源轉換成電能的工廠。（）A.錯誤 B.正確

滿分：2 分 15.按電氣設備裝設地點不同，配電裝置可分為屋內配電裝置和屋外配電裝置。（）A.錯誤 B.正確

滿分：2 分

16.內橋接線適用于線路較長、容量較小和變壓器需經常切換運行方式的裝置中。（）A.錯誤 B.正確

滿分：2 分

17.在倒閘操作中，起用母線時，應遵循先充電檢查，后接入使用的原則。（）A.錯誤 B.正確

滿分：2 分

18.設計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，均應小于規范中所規定的安全凈距。（）A.錯誤 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.錯誤 B.正確

滿分：2 分

20.事故信號的主要任務是在斷路器事故跳閘時，能及時地發出音響，并作相應的斷路器燈位置信號閃光。()A.錯誤 B.正確

滿分：2 分

第四篇：西安交大電路在線作業

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

滿分：2 分

2.一根粗細均勻的電阻絲，阻值為25Ω，將其等分成五段，然后并聯使用，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，則通過該電容的電流越大

B.電容上的電壓越大，則通過該電容的電流越大

C.電容電壓的絕對值在某時刻達到最大值時，此時電容儲能也最大 D.若電容上某時刻電壓為零，則該時刻電容上的電流一定為零

滿分：2 分

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

滿分：2 分

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

D.不能確定

滿分：2 分

6.當電路中存在受控源時和在非線性電路中，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的電阻器使用時通過電流的限額是（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，接到頻率為1000Hz的正弦電壓源上，為使電阻兩端電壓達到最高，電感L應取：（D）A.1H B.1/2лH C.1/2H D.1/4л2H

滿分：2 分

9.只具有存儲磁場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.理想電流源的內阻為(B).A.0 B.∞

C.有限值

D.由外電路來確定

滿分：2 分

11.當RLC串聯電路發生諧振時，下列（A）是錯誤的。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.集總參數電路的最大尺寸滿足（A）A.略微大于電磁波波長 B.略微小于電磁波波長 C.遠遠大于電磁波波長 D.遠遠小于電磁波波長

滿分：2 分

13.在三相四線制電路中,通常所說的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

滿分：2 分

14.將標明220V、100W的燈泡接在電壓低于220V的電源上，燈泡實際消耗的功率（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刻其電壓值為0，則該時刻電感上的儲能（A）A.不一定為0 B.一定為0 C.一定不為0 D.無法確定

滿分：2 分

16.一個實際電路的電路模型（B）A.是唯一的

B.在不同應用條件下可以有不同的形式 C.是具有某種確定電磁性質的真實元件 D.不具有精確的數學定義

滿分：2 分

17.理想電壓源、理想電流源在電路中的功率（A）A.與外電路無關 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“＋” 極經元件運動到元件的“-”極，電場力做的是（A），這時，元件（）能量。A.做正功 吸收 B.做正功 釋放

C.做負功 吸收 D.做負功 釋放

滿分：2 分

19.下列各部分中，哪一個不是線性電路的組成部分（D）。A.時不變線性無源元件 B.線性受控源 C.獨立電源 D.集總元件

滿分：2 分

20.電路中理想電壓源兩端電壓（A）A.與外電路無關 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.當三相電源對稱，負載對稱時，中線電流為０，因而可以取消中線。B A.錯誤

B.正確

滿分：2 分

2.三相負載三角形聯接時,測出各線電流都相等,則各相負載必然對稱B A.錯誤 B.正確

滿分：2 分

3.電流相等的兩個元件必屬串聯,電壓相等的兩個元件必屬并聯。A A.錯誤 B.正確

滿分：2 分

4.僅改變三相對稱電源的頻率是不影響三相對稱負載吸收的有功功率的。B A.錯誤

B.正確

滿分：2 分

5.若電路有ｎ個節點，按不同節點列寫的ｎ－１個ＫＣＬ方程必然相互獨立。B A.錯誤 B.正確

滿分：2 分

6.若二端網絡Ｎ與某電流源相聯時端電壓為６Ｖ，則在任何情況下二端網絡Ｎ對外都可以用６Ｖ電壓源代替。A A.錯誤

B.正確

滿分：2 分

7.在對稱三相電路中,任何時刻,三相負載吸收的總的瞬時功率和平均功率都是一個常數。B A.錯誤 B.正確

滿分：2 分

8.同一個一階電路的零狀態響應、零輸入響應和全響應具有相同的時間常數.B A.錯誤 B.正確

滿分：2 分

9.正弦電流通過電感或電容元件時,若電流為零則電壓絕對值最大,若電流最大則電壓為零。B A.錯誤 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。如小信號法解非線性電路就是用疊加定理。A A.錯誤

B.正確

滿分：2 分

11.電壓源在電路中一定是發出功率的。A A.錯誤 B.正確

滿分：2 分

12.一個二端元件的伏安關系完全是由它本身所確定的，與它所接的外電路毫無關系。B A.錯誤 B.正確

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

滿分：2 分

14.星形聯接電壓源供電給星形聯接負載時,如中點偏移電壓越大, 則負載各相電壓越小。A A.錯誤 B.正確

滿分：2 分

15.采用非關聯參考方向時,電感電流比電壓超前π/2rad, 電容電流比電壓滯后 π/2rad。B A.錯誤 B.正確

滿分：2 分

16.根據Ｐ=ＵＩ,對于額定值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.錯誤 B.正確

滿分：2 分

19.在電壓近似不變的供電系統中，負載增加相當于負載電阻減少。B A.錯誤

B.正確

滿分：2 分

20.空心變壓器副繞組如接感性負載，則反映到原繞組的引入電抗一定是容性電抗。B A.錯誤 B.正確

滿分：2 分

21.列寫ＫＶＬ方程時,每次一定要包含一條新支路才能保證方程的獨立性。B A.錯誤 B.正確

滿分：2 分

22.在Ｒ、Ｃ串聯電路中，由于時間常數與電阻成正比，所以在電源電壓及電容量固定時，電阻越大則充電時間越長，因而在充電過程中電阻上消耗的電能也越多。A A.錯誤 B.正確

滿分：2 分

23.若某元件的伏安關系為u＝2i+4，則該元件為線性元件。B A.錯誤 B.正確

滿分：2 分

24.在計算電路的功率時，根據電壓、電流的參考方向可選用相應的公式計算功率。若選用的公式不同,其結果有時為吸收功率，有時為產生功率。A A.錯誤

B.正確

滿分：2 分

25.在ＲＬ串聯電路與正弦電壓接通時,?電流自由分量的初值總與穩態分量的初值等值反號。(初始狀態為零)B A.錯誤 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.錯誤

B.正確

滿分：2 分

27.阻值不同的幾個電阻相串聯，阻值大的電阻消耗功率小。A A.錯誤 B.正確

滿分：2 分

28.若兩個有源二端網絡與某外電路相聯時，其輸出電壓均為Ｕ，輸出電流均為Ｉ，則兩個有源二端網絡具有相同的戴維南等效電路。A A.錯誤 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，與外電路無關。因此它的端電壓則是一定的，也與外電路無關。A A.錯誤 B.正確

滿分：2 分

30.兩只額定電壓為110V的電燈泡串聯起來總可以接到220V的電壓源上使用。A A.錯誤

B.正確

滿分：2 分

第五篇：交大網絡教育《馬克思主義基本原理》作業1：學習體會

馬克思主義哲學主要對我們學生進行唯物主義哲學的基本原理教育，使我們掌握馬克思主義哲學的基本觀點、立場和方法；幫助我們掌握 馬克思主義的世界觀和方法論；幫助我們樹立正確的人生觀和價值 觀；培養學生運用馬克思主義哲學的觀點和方法去分析問題、解決 問題的能力，提高我們的政治理論素質和思維水平，為我們正確理 解馬克思主義，確立社會主義信念自覺堅持黨的路線、方針和政策 打下堅實的基礎。馬克思主義哲學是19世紀40年代，馬克思和恩格 斯根據無產階級反對資產階級的斗爭的實踐需要，在總結當時的自 然科學的最高成果、批判地吸取歷史上一切優秀的思想文化成果、特別是德國古典哲學的基礎上創立的。馬克思主義哲學同一切舊哲 學相比，具有科學性、階級性、實踐性三個本質特征。馬克思主義 哲學的內容：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、規律性、聯系運動的矛盾辨證性;作為一種認識論和實踐論,辨證唯物主義是指正確認識最終來源于

感官的感覺和主體的物質實踐活動,認識和實踐在認識、實踐、認識、實踐的辨證運動中相互促進發展。