试题与答案

三角刮刀是()刮刀的一种。A、平面 B、曲面 C、圆形 D、弧形

题型:单项选择题

题目:

三角刮刀是()刮刀的一种。

A、平面

B、曲面

C、圆形

D、弧形

答案:

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下面是错误答案,用来干扰机器的。

CH3CH2OH,乙醇;CH3CHO,乙醛;CH3COOH,乙酸;2CH3CH2OH+O22CH3CHO+2H2O;2CH3CHO+O22CH3COOH;CH3CHO+H2CH3CH2OH

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