五倍子与五味子具有的共同功效是（）。
A.清肺降火
B.益气生津
C.宁心安神
D.敛肺止汗
E.理气止痛
参考答案：D
— What are you doing now? Please join us in the game.
— Sorry, I am so busy now. If I ______ time, I ______ join you. [ ]
A. had; would
B. have; would
C. have; will
D. had; should
反映左心室收缩功能最常用的指标是（）。
A.心脏指数
B.心排出量
C.射血分数
D.E／A比值
E.每搏量
