在变电所内进行停电作业时,作业人员、机具与带电设备的最小安全距离(无防护栅时)27.

题型:单项选择题

问题:

在变电所内进行停电作业时,作业人员、机具与带电设备的最小安全距离(无防护栅时)27.5kV或35kV为()mm。

A.1500

B.1000

C.700

D.350

考点:变电站值班员考试变电站值班员综合练习变电站值班员综合练习题库
题型:单项选择题

点燃氢气之前必须检验氢气的纯度,这是因为点燃不纯的氢气会______如果用向下排空气法收集氢气经检验不纯,需要再一次收集氢气之前,应该______.

题型:单项选择题

阅读理解。

     City buses are white and blue. Please board at the front door and pay the fare as you get on.

The fare per ride is $1.50 for adults and $1.00 for senior citizens. The fare may be paid by cash,

bus pass or multiple passes. Please pay the exact amount directly into the slot at the top of the far

e box. Remember that bills are not accepted and drivers cannot make change for riders.

     When you wish to get off the bus, please notify the driver in advance by pressing one of the

buttons provided throughout the bus for this purpose. The bus may pass bus stops without

stopping if no one is getting off or waiting to get on.

     There are five subway lines in the city. The fare is set at five rates from $2.00 to $3.50 according

to the number of predetermined "price zones" traveled. To purchase the appropriate ticket, please

check the fare on the boards installed above the ticket-selling machines in each subway station.

     Pass through the automated ticket gates by inserting the ticket into the slot. When getting off the

subway at a station beyond the validity of the ticket, pay the additional fare at a fare-adjustment

machine.

1. According to the information, all bus riders should _________.

A. exit from the back door        

B. let the driver know in advance if they want to get off

C. ask the driver for change      

D. pay according to a "price zone"

2. What is the lowest cost of a subway ride for an adult?

A. $1.00.          

B. $1.50 .          

C. $2.00.      

D. $3.50.

3. How can a rider determine the fare of a subway ride?

A. It is automatically determined.              

B. It is always $2.00

C. Fare-adjustment machines determine the fare.  

D. All fares are posted

4. This text mainly tells us _________.

A. how to use city buses and subways            

B. how convenient city buses and subways are

C. how to pay the fare for city buses and subways

D. how well city buses and subways are equipped

题型:单项选择题

“山重水复疑无路,柳暗花明又一村”的造景手法是()。

A、障景

B、借景

C、抑景

D、对景

题型:单项选择题

一侧坐骨神经在梨状肌下孔处受损,将出现()

A.同侧髋关节不能伸

B.同侧膝关节不能伸

C.同侧下肢皮肤感觉完全丧失

D.足不能活动

E.以上都不是

题型:单项选择题

张择端的名作《清明上河图》反映的是宋代哪座城市的风貌()

A、汴州

B、杭州

C、扬州

D、苏州

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