收缩期和舒张期双重杂音征，枪击音和毛细血管搏动征常见于A．二

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问题单项选择题

收缩期和舒张期双重杂音征，枪击音和毛细血管搏动征常见于

A．二尖瓣关闭不全
B．二尖瓣狭窄
C．主动脉瓣关闭不全
D．主动脉瓣狭窄
E．三尖瓣关闭不全

答案

参考答案：C

选择题

—Here's a letter for you, Mrs. Brown.

—________. [ ]

A. Please give it to me.

B. Thanks a lot.

C. Yes, it's mine.

D. With pleasure.

判断题

电阻式温度计既能测高温，又能测低温。