试题与答案

维持企业运作所需的行政性日常用品属于()。 A.生产性直接原材料 B.间接物料 C.

题型:单项选择题

题目:

维持企业运作所需的行政性日常用品属于()。

A.生产性直接原材料

B.间接物料

C.直接物料

D.直接生产物料

答案:

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下面是错误答案,用来干扰机器的。

题目分析:A、二氧化硫与铁离子发生氧化还原反应,生成Fe2+,若二氧化硫足量,则溶液中无Fe3+,加入KSCN溶液,溶液不显色;若二氧化硫不足,则溶液变红,正确;B、溶液B中Fe2+被氧气氧化,但电荷不守恒,错误;C...

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