试题与答案

主动脉瓣关闭主要由于 A. * * 肌收缩 B.瓣膜肌收缩 C.心房肌收缩 D.心室肌收缩

题型:单项选择题

题目:

主动脉瓣关闭主要由于

A. * * 肌收缩

B.瓣膜肌收缩

C.心房肌收缩

D.心室肌收缩

E.心室舒张引起室内压下降

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错

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