下列哪项引起左心室容量负荷过重致急性左心衰竭（）
A.主动脉瓣狭窄
B.肺动脉瓣狭窄
C.二尖瓣狭窄
D.二尖瓣关闭不全
E.扩张型心肌病
参考答案：D
A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.
A．to steal
B．stealing
C．stole
D．stolen
房水充满前房和后房，全量约为（）
A.0.10～0.12ml
B.0.06～0.10ml
C.0.20～0.40ml
D.0.12～0.15ml
E.0.15～0.30ml
