（）系统可用于有爆炸危险、火灾危险性较大或安全要求较高的工业_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

（）系统可用于有爆炸危险、火灾危险性较大或安全要求较高的工业与民用建筑等低压供电系统，独立附设变电站的车间。

A、TN-S

B、TN-C-S

C、TN-C

答案

参考答案：A

选择题

The boy, rather than his friends, _________ for the accident.

A．are responsible

B．were responsible

C．be responsible

D．is responsible

选择题

They go to school every day weekends. [ ]

A. besides

B. beside

C.except