The poor lady had to go out for food a cold morning.[ ]
A.in
B.at
C.on
D.during
答案:C
猝死最常发生于()
A.冠心病
B.肥厚型心肌病
C.二尖瓣脱垂
D.主动脉瓣狭窄
E.心内膜炎