老师走了进来，手里拿本书。

A. fights between parties for election
B. scandals of the politicians
C. policies of each party
D. how election is proceeded

A. 不具有多成分的综合疗效
B. 适用于不明成分的药材制备
C. 不能提高有效成分的浓度
D. 药效缓和持久
E. 毒性较大