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问题 单项选择题

伤食泄泻特点是（）

A．泄泻清稀，甚如水样

B．泄泻腹痛，泻下急迫

C．泻下粪便，臭如败卵，泻后痛减

D．每因抑郁恼怒或情绪紧张发生泄泻

E．黎明之前，腹痛作泻

答案

参考答案：C

单项选择题

WG-21A型无绝缘轨道电路补偿电容应均匀设置，间隔为（）。

A.100m

B.200m

C.250m

D.300m
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选择题

— I'm sorry to trouble you. Could I use your phone, please?

— _____. Here you are. [ ]

A. Yes, you could

B. Yes, you can

C. No, you can't

D. Sorry, you can't

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