“物质的组成和结构决定物质的性质物质的性质决定了物质的用途. 请分析1�刚石很硬而石墨却很软.原因是 2碳膜片一种由碳元素 Template




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tomski“物质的组成和结构决定物质的性质物质的性质决定了物质的用途. 请分析1�刚石很硬而石墨却很软.原因是 2碳膜片一种由碳元素 coloring