—What’s ______ most useful invention in the 20th century?

—______ computer, I think.

A．the, A

B．a, A

C．the, The

D．/, The

遇急性尿潴留病人导尿失败，医护人员又无其他手术器械，应考虑行

A．静脉给予利尿剂

B．下腹部压迫膀胱促排尿

C．耻骨上膀胱穿刺抽尿

D．针灸足三里穴

E．嘱患者大量饮水