辛凉解表剂中有时配伍辛温解表药，其意义在于（）
A.通络止痛
B.助透邪外出
C.解肌发汗
D.发散风热
E.发散风寒
参考答案：B
The students _______ how to do the experiment in class yesterday. [ ]
A. taught
B. were taught
C. are taught
D. teach
外膜
