Graham-Steell杂音见于
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．肺动脉瓣关闭不全
参考答案：B
He had to so that others could hear him be cause it was too noisy in the room. [ ]
A .sing
B. cry
C. shout
D. laugh
* * 是最根本的党内法规，是管党治党的总规矩。
