大工15年春《大学英语3》在线测试3 100分答案

大工16秋《大学英语3》在线测试2满分答案

1：Information has been put forward__________ more middle

school graduates will be admitted into universities.

A：while

B：that

C：when

D：as

正确答案：B

2：With the constant change of theconditions， the outcome

is not always _________.

A：favorable

B：predictable

C：capable

D：reasonable

正确答案：B

3：Hardly ______on stage _____ theaudience started

cheering.

A：he had come ... than

B：he had come ... when

C：had he come ... when

D：had he come ...than

正确答案：C 4：Mother doesn't know muchtime I have spent in

watching TV; if she ever found out ，I'm sure().

A：she'd never forgive me

B：she never forgive me

C：she'll never forgive me

D：she does never forgive me

正确答案：C

5：_______ the War of Independence， the United States was

an English colony.

A：Before

B：At

C：In

D：Between

正确答案：A

6：_____ is often the case， one third of the workers have

大工20春《大学英语4》在线测试3答案

1: When doing laundry。it is XXX.

2: Chinese is a language spoken by more people than any

other language.

3: In some parts of London。missing a bus means waiting for

another hour.

4: He says he really can't afford to wait another day.

5: I know nothing about the young lady except that she is

from Beijing.

6: It occurs to me that I've run out of clean XXX.

7: A man is XXX.

8: How about all of us going out for a walk after supper?

9: XXX in that kind of r。you will end up in prison.

10: Will you please spare me some ink。I have run out of it.

11: "I should have told her last week," you said。"I'll tell

Mary about her new job tomorrow."

12: I went to the lecture early so that I could get a good seat.

13: Do you know the difficulty he had finishing the work?

14: XXX.

15: "Have you ever been to our town?" "No。this is the first

大工15秋《电器学》在线测试2100分答案

大工15秋《电器学》在线测试2

一、单选题（共8道试题，共32分。）

1.下列电器中，不属于配电电器的是（）。

A.刀开关

B.接触器

C.熔断器

D.断路器

——选择：B

2.当低压接触器的额定工作电压为380V时，额定工作电流可近似地认为等于额定控制功率（kW）的（）倍。

A. 1

B. 2

C. 3

D. 4

——选择：B

3.有银合金触点的触头取超程值为两触头总厚度的（）%左右。A. 25

B. 50 C. 75

D. 100

——选择：C

4.下列材料中，唯一的非金属触头材料是（）。

A.银

B.铜

C.石墨

D.铝

——选择：C

5.下列电器中能够起到扩大触头数量及触头容量作用的是（）。A.通用继电器

B.电流继电器

C.中央继电器

D.以上都不能

——选择：C

6.大电流时，触头材料的电侵蚀主要施展阐发为（）。

A.熔焊

B.冷焊

C.桥蚀

D.弧蚀 ——选择：D

7.触头发热时，触点的温度和触头自己的温度有甚么关系？（）A.前者比后者高

B.二者相等

C.前者比后者低

D.二者无关

——选择：A

8.（）是确定接触电阻的决定性因素。

A.打仗形式

B.接触压力

C.表面状况

D.材料性能

——选择：B

大工15秋《电器学》在线测试2

二、多项选择题（共8道试题，共40分。）

1.直流电磁机构吸合和释放比较缓慢受哪些因素影响？（A.电磁机构静态热性平坦

B.电磁工夫常数大

C.磁通的建立比力缓慢

D.磁通的消失比较缓慢 ——选择：BCD

2.表面膜层包含哪些？（）

A.尘埃膜

B.化学吸附膜

C.无机膜

D.有机膜

——选择：ABCD

3.触头材料一般包括哪几类材质？（）

A.合金

B.粉末合金

C.纯金属

D.碳水化合物

——选择：ABC

）4.电磁机构的相似必须满意下列哪两项前提？（）A.化学相似

B.电气相似

C.物理相似

D.几何相似

2009年3月份《大学英语 3》课程考试 模拟题二 考试形式：闭卷 试卷类型：（B）

Part I Vocabulary & Structure（本大题共25小题，每小题1分，共25分）

Section A (1-5 BCCBB 6-10 ACBCC 11-15 ACBBB)

Directions: Choose the ONE that is closest in meaning to the underlined part in the sentence.

1. Living on an isolated farm, they do not see anybody for weeks on end. B

A．in the end B．continuously C．off and on D．endlessly

2. I was at a complete loss as to how I could help him out without hurting his pride. C

A．at a price much lower than the original coat B．quite useless C．rather uncertain D．quite unprepared

3. With a school record like yours I’m puzzled why you didn’t try for a university scholarship? C

A．I’m shocked B．I’m amazed C．I feel confused D．I feel pity

4. He had been compelled to give up much of his time to housework. B