处方药的批发企业必须具有()
A.药品生产企业许可证
B.药品经营企业许可证
C.两者均需
D.两者均不需
参考答案:B
You'd better ______ for school again. [ ]
A. not be late
B. not to be late
C. be not late
D. to not be late
不寐的病位主要在()
A.心
B.脑
C.肝
D.脾
E.肾