----Is Tony the student awarded at the graduation ceremony in your class?

----There is ______ Tony, but I’m afraid he isn’t ______ one you mentioned.

A．the; the

B．a; a

C．/, the

D．a; the

下列哪项是二尖瓣狭窄作闭式扩张的手术指征（）。

A.2个月前发生脑栓塞

B.合并妊娠6个月

C.3周来发热、血培养阳性

D.超声心动图检查疑左心房内血栓

E.心脏照片及超声心动图疑二尖瓣膜有钙化