跌打损伤，瘀肿疼痛可选用（）
A.乳香
B.没药
C.土鳖虫
D.牛膝
E.丹参
参考答案：A, B, C, D, E
低颅压综合征
The committee has recommended that the training program _______ improved .
A．would be
B．is
C．was
D．be
