一般中药口服每日服（）次。
A.2～3
B.1～3
C.2～4
D.3-4
参考答案：A
—I'm sorry I went out for a smoke. I was very tired.
—There's no ______ for this while you are at work. [ ]
A. cause
B. excuse
C. matter
D. choice
立式容器支座主要有悬挂式、支承和（）三种
A、自撑式
B、独立式
C、裙式
