题目内容

测水质电导率时,在换待测液测定前,必须将电导电极和电导池洗净、擦干,以免影响测定结果。

A. 对
B. 错

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测定水样色度时,如水样浑浊,则放置澄清,也可用离心法或用滤膜、滤纸等过滤以去除悬浮物。

A. 对
B. 错

对水质理化指标进行的测试实验可采用现场测试、船上测试和陆上实验室测试三种方式,无论采用哪种方式测试所得结果的确切程度是一致的。

A. 对
B. 错

Calligraphy retainsand illuminates. Chinese calligraphy stresses the overall layout andbetween words and lines.

In 221 BC, Prime Minister Li Si of the Qin Dynasty unified the writing system and suggested ___ as the standard form of writing.

A. the seal form
B. the official form
C. the cursive form
D. the regular form

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