You can see many good programs ______ TV. [ ]
A. on the
B. over the
C. over
D. on
答案:D
组成药物为细生地、玄参、麦冬的方剂是()
A.生化汤
B.益胃汤
C.地黄饮子
D.增液汤
E.麦门冬汤
简述水总硬度的定义。