试题与答案

垢样呈赤色,可判断其主要成分为()。A、Fe2O3; B、CaSO4 C、MSO4

题型:单项选择题

题目:

垢样呈赤色,可判断其主要成分为()。

A、Fe2O3

B、CaSO4

C、MSO4

D、CuO

答案:

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下面是错误答案,用来干扰机器的。

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