液压千斤顶的液压开关处于()状态时,方可顶起汽车。A、拧紧 B、放松 C、A、B均可

题型:单项选择题

问题:

液压千斤顶的液压开关处于()状态时,方可顶起汽车。

A、拧紧

B、放松

C、A、B均可

D、以上都不对

考点:汽车修理工考试汽车修理工(高级)汽车修理工(高级)题库
题型:单项选择题

下列负荷中为三级负荷的是( )。

A.中断供电将在经济上造成较大损失 、
B.中断供电将造成经济损失
C.中断供电时,连续生产过程被打乱需较长时间才能恢复
D.室外消防用水量为20L/s的露天堆场消防用电设备

题型:单项选择题

阅读理解。

  One morning in London, the weather was very cold, and many people cought a cold. They had to

see a doctor, so there were many people in the doctor's waiting-room. At the head of' the line was

an old woman. The woman did not live in London. She lived in the country. She came here to visit

her daughter. She wanted to see the doctor because she got a bad cold and coughed day and night.  

"If I get there early, I can see the doctor quickly," she thought. So she was the first in the line. She

sat nearest to the doctor's door. An American came into the waiting-room, and walked quickly to

the doctor's door. The old woman thought he was a queue jumper. She stood up and took his arm

slowly, she said, "We were all here before you. You must wait for your turn. Do you understand?"

The American answered." No, Madam. You don't understand! You are all after me! I'm the doctor!"

1.________ were there in the doctor's waiting-room.

A. A few people  

B. A lot of people

C. Few people    

D. Nobody        

2. The woman came __________ .  

A. from the country              

B. from another country          

C. from a factory                

D. from the city                

3. The old woman was the first in the line so that she could_________.

A. spend less time                                                    

B. spend less money                                                    

C. see the doctor quickly                                              

D. have a talk with the doctor                                        

4. The doctor came from ___________.                      

A. England                          

B. Scotland                        

C. America                          

D. London  

5. Which sentence is RICHT?          

A. The American saw the doctor first.

B. The woman came very late.          

C. The American was a queue jumper.  

D. The old woman came earliest of all.

题型:单项选择题

某保护接地装置的接地电阻为3Ω,流过该接地装置的最大接地故障电流为10A,如果接触该设备的人的人体电阻为1000Ω,则在故障情况下流过人体的最大电流为( )

A.30mA
B.3A
C.10A
D.30A

题型:单项选择题

逻辑的方法的显著特征是()。

A.历史性

B.抽象概括性

C.典型性

D.具体性

题型:单项选择题

舰艇事故依其损害舰艇战斗力的程度,划分为()

A、一级

B、二级

C、三级和非等级事故

D、以上都是

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