问题 问答题 简答题

装、拆接地线有哪些要求?

答案

参考答案:

装、拆接地线必须由两人进行。装设接地线时,必须先接接地端,后接导体端,且必须接触良好;拆接地线的顺序与装时的相反。装、拆接地线,均应使用绝缘棒和载绝缘手套。

接地线应用多股铜线,其截面应符合短路电流的要求,但不小于25mm2。在装设前应经过详细检查是否损坏和合格。

接地线必须使用专用线夹固定在导体上,严禁用缠绕的方法进行接地。

阅读理解

阅读理解。

     My elder sister is an airhostess (飞机服务员). Yesterday morning my sister was at the back of the plane.

She was going to take food and drinks to the passengers. A little old woman, who took on the plane for the

first time, came up to her and said, "Could you tell me where the Ladies' Room is?"

     "Certainly, Madam," answered my sister. "It is right at the other end of the plane in the front." The old

woman went too far. She walked all the way to the front of the plane, opened the door in front of her and

saw the captain (机长) and his workmates in the small room. They were all busy with their work and didn't

see her. She went out again and came back to my sister. "Oh, did you find it?" asked my sister. "Yes, I did,"

said the little old woman."But there were four men in the Ladies' Room watching TV!"

1. What does the writer's elder sister do?

A. She is a worker.

B. She is a teacher.

C. She is an airhostess.

D. She is a student.

2. Who does she take food and drinks to?

A. Her brother.

B. The passengers.

C. The captain.

D. The madam.

3. Why didn't the old woman know where the Ladies' Room was?

A. Because she travelled by air for the first time.

B. Because she wanted to walk with my sister.

C. Because she was very old.

D. Because there weren't any toilets in the plane.

4. Where did the old woman go? 

A. Bedroom.

B. Men's room.

C. Control cabin (控制舱).

D. Sitting room.

5. What did the old woman think?

A. My sister fooled her.

B. My sister fooled the four men.

C. The old woman thought she went to the wrong place.

D. The four men watched TV in the Ladies' Room.

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