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问题 单项选择题

大咯血患者应用垂体后叶素止血的机制为

A．收缩肺小血管，降低门静脉压力

B．收缩肺小动脉，使肺循环血量减少

C．降低肺静脉压

D．激活凝血系统

答案

参考答案：B

解析：垂体后叶素可收缩小动脉，使肺循环血量减少，而应用于大咯血患者的治疗。

选择题

I _____ like this dog.[ ]

A. am not    

B. don't    

C. doesn't

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单项选择题

The Time Management function as it relates to personnel ______.

A) refers primarily to the manner in which the project manager and the various functional contributions to the project manage their time on a daily basis
B) should not be emphasized because it develops a "clock-watching" mentality in the project team
C) consists of four overlapping processes, planning, estimating, scheduling, and controlling
D) consists of two overlapping processes, planning and controlling
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