液压月考试卷

发布 2023-12-21 23:55:12 阅读 9444

《数学》一、选择题(每题2分)1a.0

2.设a.2; b.4; c.6; d.8

3.( a.1 b.-1 c. d.

4.等于( )abcd. 1

c.2e2 d.2e

二、计算(每题3.5分)

1.求曲线及y=x-4所围成图形的面积。 2.求曲线y=及y=x所围成图形绕x轴旋转的体积。

三、求下列定积分(每题4分)(12)

英语》一、选择题:(每题2分)

1.-“who is he2.-“we’er late. the play has started.”

“i don’t know. you may ask maryi wonder how long ago ”

he is b. who is he c. he is it begin b. it began c. does it begin

3. he asked me had enjoyed b. had i enjoyed c. i enjoyed d. did i enjoyed

4. the teacher asked old was i b. how old i was c. how was

5. i’d like to know how improve the design. a. could ib. i can c. can d. i could

to the time table, the train for beijing at 9:10 from monday to friday.

a. was le**ing b. is le**ing left

proposal at the meeting now is of great importance to our department.

discussed be discussed discussed

when we hurried to the airport the flight was cancelled.

found b. did we find c. which h**e found

9. allan is looking forward tohis american partner at the fair.

a. meet b. meeting met

the time you come to see me next month, imy term *****.

we find c. h**e we foundd. we h**e found

二、填空(每题1分)1. if the were here tomorrow, the problem(solve

wouldn’t h**e been s**ed even if he even if he never(send) to hospital at once.

3. if only i (takeyour advice at that time!

4. we wish that people everywhere (showmore concern for the environment around them.

5. it is a great pity that he (beso stubborn(顽固)

电工电子技术》一、填空(每空2分)

1 、电源和负载的本质区别是:电源是把能量转换成能的设备,负载是把转换成能量的设备。

2是产生电流的根本原因。

2、名词解释:电流源(3分)

3、解答题1、写出欧姆定律的公式3分)

2、请简述基尔霍夫电流定律:(4分)

3、简述应用叠加定理解题的步骤。

计算:试用叠加定理求如图所示电路中的电流。(共6分)

4、请写出应用戴维南定理解题的步骤。(6分)

5、分别用叠加定理和戴维南定理求解图1-34电路中的电流i3。设us1=30v us2=40v r1=4ω r2=5ω r3=2ω。 12分)

6、请简述串并联(6分)

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