大鼠亚慢性毒性试验染毒期为
A.1天 B.14天 C.90天 D.12个月 E.24个月
参考答案:C
Have you considered how weak humans are a volcano, hurricane or earthquake?
A.comparing with
B.compared with
C.to compare with
D.having been compared with
研究不及格室间质评结果的程序,调查应包括()
A.书写误差的检查
B.质控记录,校准状况及仪器功能检查的审核
C.当可能时应重新分析和计算
D.评价该分析物实验室的历史性能
E.结果评价的问题