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问题 单项选择题

地下燃气管道与排水管的最水水平净距为（）m。

A、0.5

B、1.0

C、1.2

D、1.5

答案

参考答案：B

选择题
— Mark speaks English well, but you ______ him.
— Thank you.

A. speak as badly as
B. speak worse than
C. don't speak so badly as
D. speak much better than
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单项选择题

延髓空洞症最常受累的颅神经核是（）

A.三叉神经脊束及脊束核

B.外展神经核

C.前庭神经核

D.迷走神经核

E.舌咽神经核
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