—Let's go and have a good drink tonight.

—________Have you got the first prize in the competition?[ ]

A. What for?  

B. Thanks a lot.

C. Yes,I'd like to.  

D. Why not?

测定缓、控释制剂释放度时，第一个取样点控制释放量在()

A.5%以下

B.10%以下

C.20%以下

D.30%以下

E.50%以下