体内样品测定的常用方法有()
A.UV
B.IR
C.GC
D.HPLC-MS
E.GC-MS
参考答案:C, D, E
用所给词的适当形式填空。
1. Thanks for _____ (take) care of my dog.
2. Don't forget _____ (turn) off the lights when you leave the classroom.
3. Could you please_____ (feed) my goldfish?
4. My mother_____ (borrow) some money last Sunday.
5. I can't _____ (be) outside late. I have to be back home before 9:00 pm.
走在全国农村改革前头的省份主要是( )
A.江苏省和浙江省
B.山东省和广东省
C.安徽省和四川省
D.上海市和北京市