腹部手术后病人出现呼吸困难、发绀、呼吸音减弱或消失，应首先考虑
A．切口感染
B．肺不张和肺炎
C．气胸
D．血胸
E．支气管炎
参考答案：B
Dave lost his job and was short of money, so _____ his flat and move in with his brother. [ ]
A. that he did was to sell
B. what he did sell
C. what he did was to sell
D. what he did sold
慢性咽后脓肿的致病菌为（）
A.乙型链球菌
B.链球菌、葡萄球菌
C.乙型溶血性链球菌
D.白喉杆菌
E.结核杆菌
