He was disappointed ____ he had learned from books quite differed from his actual life.

A．what

B．that

C．which

D．how

房间隔缺损的X线表现应该除外下列哪项（）

A.肺血多

B.右房右室大

C.肺动脉段突出

D.主动脉结增宽

E.透视可见肺门舞蹈