John was________to learn the news that he was rejected by the committee.[ ]

A．let down  

B．put down

C．noted down  

D．taken down

急性腹痛伴休克．最常见的病因是（）

A.急性心肌梗死

B.大叶性肺炎

C.胃、十二指肠溃疡穿孔

D.急性坏死性胰腺炎

E.急性坏疽性胆囊炎