题目内容

饮用水中氯化物测定方法不包括()。

A. 硝酸汞滴定法
B. 硝酸银滴定法
C. 离子色谱法
D. 离子选择性电极法

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定性研究不对研究对象施加任何干预,无自变量和因变量。()

下列属于行政纠错问责方式的有()
A责令公开道歉
B停职检查
C引咎辞职
D拘役

His parents believed that he was a clever boy, but he wasnt ______ in fact.

A. kind
B. kind of
C. such
D. a such

You neednt ______ him about this since he could find out for himself.

A. tell
B. have told
C. be telling
D. have to tell

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