抢救呼吸衰竭患者,使用呼吸机不当可出现()
A.加重心力衰竭
B.加重二氧化碳潴留
C.呼吸性碱中毒
D.呼吸机相应性肺炎
E.气胸
参考答案:A, B, C, D, E
---- What were you doing when Tony phoned you?
---- I had just finished my work and _____to take a shower.
A.had started
B.started
C.have started
D.was starting
“比较优势”贸易理论的提出者是()
A.亚当•斯密
B.大卫•李嘉图
C.凯恩斯
D.曼昆