多项选择题

照明系统接地按其保护接地的形式不同可分为（）。

A.IT系统
B.TT系统
C.TN系统
D.IN系统
E.NT系统

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热门试题

单项选择题

M：I think I’ll read ahead a few chapters，just to get the general idea.W：Try pacing yourself.Slowly but surely you’ll understand it all.Q：How does the woman suggest the man read the book？（）

A．He should understand the general idea first.
B．He should slow down reading.
C．He should not try to read too slowly.
D．He should mark time carefully.

单项选择题

M: I saw Jason yesterday.He invited us to dinner tonight.W: That’s so nice.But I really don’t know him and besides,I have so much work to do.Q: What does the woman mean?（）

A．She doesn't like Jason.
B．She would prefer not to go.
C．Jason is always a nice man.
D．She would like to go.