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第 10: 10下列各物质中,熔点最高的是（）

A、K2O

B、MgO

C、CaO

D、Na2O

时间：2021-09-06 20:45 关键词：文鼎教育乐山师范学院无机化学及实验 A卷

答案解析

B

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