以下哪些病变可出现S2通常分裂（）A．二尖瓣狭窄 B．二尖瓣关闭

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问题多项选择题

以下哪些病变可出现S2通常分裂（）

A．二尖瓣狭窄

B．二尖瓣关闭不全

C．肺动脉瓣狭窄

D．左向右分流的室缺

E．完全性右束支传导阻滞

答案

参考答案：A, B, C, D, E

单项选择题

M: Morning, Lily. What kept you

W: Morning, Stan. Sorry I’m so late, but you know, it’s impossible to find a parking place round here.

Why was the woman late （）

A. There was something wrong with her car.

B. She got up too late.

C. There was no parking place nearby.

D. She got lost on her way to Andrew’s home.

填空题

水与酒精混合后的总体积小于混合前的体积之和，表明分子之间存在着________；把两块表面干净的铅块压紧，下面吊一个重物也不能把它们拉开(图)，说明分子间存在________。