对药品进行杂质检查应在什么步骤后进行
A．样品审查
B．取样
C．鉴别
D．含量测定
E．检验报告
参考答案：C
Not until he went through real hardship ______ the love we have for our families is important.
A．did he realize
B．had he realized
C．he realized
D．he had realized
将零件安装在构架上，检查零件与构架之间的贴合度，要求在100mm长度内，零件与构架之间的间隙不大于（）mm。
A.0.1
B.0.2
C.0.3
D.0.5
