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
