依据监督检查的需要,药监部门对药品抽查检验时
A.不得乱收费
B.不得免费检验
C.不得收取任何费用
D.可以适当收取一定费用
E.必须向检验机构预先支付化验费用
参考答案:C
It's necessary _______ us to keep our pets clean every day. [ ]
A. of
B. for
C. with
D. between
安全操作规程分哪几个部分?