左侧卧位时，可使杂音更明显的是（）
A.二尖瓣关闭不全
B.肺动脉瓣狭窄
C.主动脉瓣狭窄
D.主动脉瓣关闭不全
E.二尖瓣狭窄
参考答案：E
.Only in this way ______ get rid of the bad habit-smoking.
A．you can
B．can you
C．you will
D．can
正常人昼尿量与夜尿量之比为
A．2:1B．3:1C．1:1D．1:3～4E．3～4:l
