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问题 单项选择题 B型题

提示右心功能不全的体征（）。

A.剑突下示心脏抬举样搏动

B.肺动脉瓣区第二心音（P2）亢进

C.颈静脉怒张

D.双下肺湿性啰音

E.心浊音界缩小或叩不出

答案

参考答案：C

选择题

He worked hard and achieved what he set out to do, but ________ what he had owned, including his health and his marriage.

A．at the mercy of

B．at the risk of

C．at the cost of

D．at the service of
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判断题

一般退运是指货物已办理申报手续且海关已经放行出口或进口，因各种原因造成退运进境或退运出境的情形（）
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