注射液的抽检不合格率不得超过
A.20%B.15%C.5%D.2%E.1%
参考答案:C
This is not what I __ him to say.
A.hoped
B.expected
C.has hoped
D.thought
高空作业所戴保险带要定期进行()。
A.检查
B.润滑
C.拉力试验
D.弹性实验