甲癣可选用：
A．青霉素B．红霉素C．林克霉素D．新青霉素ⅡE．灰黄霉素
参考答案：E
E-shopping, when properly _____, can save us a lot of time and money. [ ]
A. doing
B. to do
C. having done
D. done
下列药物入煎剂，需先煎方能取效的是
A．滑石
B．菟丝子
C．生石膏
D．车前子
E．芒硝
