诱发与加重心力衰竭的最主要、最常见诱因是（）
A.肺部感染
B.过度劳累
C.情绪激动
D.原有心脏病加重
E.过多过快输血输液
参考答案：A
He has so _____ money that he can't afford the book. [ ]
A. a few
B. few
C. a little
D. little
百部的入药部位为
A．块根 B．根茎 C．块茎 D．鳞茎 E．球茎
