A.6
B.7
C.8
D.9
[单选题]A.6B.7C.8D.9
[单选题]A.主动脉二叶瓣B.主动脉单瓣C.主动脉四叶瓣D.主动脉三叶瓣E.主动脉五叶瓣
[单选题]A.B.C.D.
[单选题]A.2B.-5C.0D.5
[单选题]A.30.0B.31.0C.33.3D.37.5
[单选题]A.符合B.不符合C.无法判断