试题与答案

循环水中总磷的测定,加入过硫酸钾的目的是()。A、显色剂 B、掩蔽剂 C、分解剂 D

题型:单项选择题

题目:

循环水中总磷的测定,加入过硫酸钾的目的是()。

A、显色剂

B、掩蔽剂

C、分解剂

D、络合剂

答案:

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参考答案:活塞式

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根据短文内容,选择正确答案(10分)

小题1:        has a computer.

A、Bill Clark               B、Ed Hall           C、Sandra Clark

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