左心室增大一般不出现于下列哪项()A．二尖瓣狭窄 B．主动脉瓣狭_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

左心室增大一般不出现于下列哪项()

A．二尖瓣狭窄

B．主动脉瓣狭窄

C．二尖瓣关闭不全

D．主动脉瓣关闭不全

E．高血压心脏病

答案

参考答案：A

选择题

---Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A．there remains; answered

B．it remains; to be answered

C．there remains; to be answered

D．it remains; answered

单项选择题

2000型泵车启动后台下发动机转速应提高到（）r/min。

A.1200

B.1500

C.1800

D.2100