I can’t believe that anyone else in the school can swim as fast as you, ________?

A．can I

B．can't they

C．can't you

D．can they

主动脉瓣关闭不全在临床上可有()

A．主动脉瓣区可闻及舒张期杂音

B．主动脉瓣区可闻及收缩期杂音

C．舒张压下降

D．收缩压下降

E．左心室肥大