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问题 单项选择题

如图，中心静脉压是测定（）

A.左心室内压力

B.位于胸腔内的上、下腔静脉近右心房口的压力

C.右心房的压力

D.下腔静脉的压力

E.颈外静脉的压力

答案

参考答案：B

选择题

Jack, who pretended       , heard, however, every word that was said.

A．not listening

B．not to be listened

C．not to be listening

D．not having listened
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选择题

-------I’m sorry I could not go to your birthday party yesterday.

--------__________. I know you are very busy recently.

A Go ahead.   B No kidding.   C Forget it.   D Not really.
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