问题 单项选择题

用于500kV及以下电压等级交流输电线路的屏蔽服,其衣料的屏蔽效率不得小于()。

A.28dB

B.38dB

C.40dB

D.42dB

答案

参考答案:C

阅读理解

阅读理解。

     A traveler was once staying in a village of another country. One day, she held up her camera to take

pictures of the children at play. Suddenly the young ones began to shout in protest (反对). 

    The traveller's face turned red and she said sorry to the head for what she was doing, and told him

she had forgotten that people in some places thought a person would lose his soul (灵魂) if his picture

was taken. 

     She explained (解释) to him the operation of a camera for a long time. Several times the head tried

to say something, but he couldn't. 

     When she was sure she had put the head's fear (害怕) to rest, the traveler then let him speak. With

a smile, he said, "The children were trying to tell you that you forgot to take off the cap (镜头盖)!"

1. The children shouted when the traveler was taking pictures of them because ______. [ ]

A. they didn't want to have their pictures taken

B. The traveler was not doing well with her camera

C. They didn't want to stop playing

D. The traveler forgot to take off the cap on her head

2. The traveler said sorry to the head because ______. [ ]

A. she thought it was not right to take people's pictures without telling them beforehand (事先)

B. the children would lose their souls

C. she had stayed in the village too long

D. she didn't take a picture of the head first

3. The traveler explained how to use a camera to the head because ______. [ ]

A. the head wanted to learn how to take pictures

B. She was afraid of the head

C. She wanted the head not to worry about what she was doing

D. The head was very interested in her camera

4. Which of the following is NOT true? [ ]

A. the head was afraid that the traveler held up her camera to take pictures of the children at play.

B. The traveler didn't understand why the children shouted.

C. The traveler knew something about people in some countries.

D. The children wouldn't mind if the traveler took pictures of them.

单项选择题 案例分析题