问题 单项选择题

照明应设()。电源应由起重机主断路器进线端分接,当主断路器切断电源时,照明不应断电。

A、专用电路

B、失压保护

C、紧急停车开关或装置

D、限位保护

E、控制器零位联锁保护

F、过流保护

G、超速保护

H、超温保护

I、雷雨保护

J、大风保护

答案

参考答案:A

阅读理解

阅读理解。

     A little knowledge can make a difference at a time of life or death. Do you know what

to do if you find yourself in an earthquake?

If you are inside: 

● Quickly move under a strong desk, a strong table or along a wall. You can also go into

a small room like the bathroom. This will protect you from falling things.

Do not get into a lift.

● Don't stand near windows, large mirrors (镜子), heavy furniture or fireplaces.

If you're outside:

● Move away from buildings and streetlights. These could fall on you.

● Squat (蹲下) and protect your head until the shaking stops.

After the earthquake: 

Check, take care of injuries and help make sure people around you are all right.

● Watch out for aftershocks.

● Protect yourself by wearing long pants, a long-sleeved (长袖的) shirt and strong shoes.

● Listen to the radio for the latest information.

1. If you are in a tall building when an earthquake happens, you'd better _____.

A. run into a lift

B. not stay in the bathroom

C. stand near large mirrors

D. not stand near windows

2. If you are outside during an earthquake, _____.

A. you must move into a building

B. you cannot squat

C. you have to stop the shaking

D. you must move away from streetlights

3. After the earthquake, you should _____.

A. look after injuries

B. not help the others around you

C. protect yourself without wearing shoes

D. not listen to the radio for the latest information

4. The underlined word "aftershocks" in the passage means "_____" in Chinese.

A. 震感

B. 震源

C. 余震

D. 防震

5. The passage is mainly about _____.

A. what to do before an earthquake takes place

B. what to do if you are in an earthquake

C. how to escape from an earthquake when you're at home

D. how to predict an earthquake in the open air

单项选择题