酸味药所含的主要成分是
A.挥发油
B.皂苷
C.有机酸和鞣质
D.糖类
E.生物碱
参考答案:C
---Do you know Lisa’s address?
---No, she didn't tell me ________________.
A.where did she live
B.where she lived
C.where did she work
D.where she worked
探望病人的时间长短大约()较为适宜。
A、1—10分钟
B、10—30分钟
C、半个小时以上