在如图所示的转化关系中abc是中学化学中常见的物质都含有同一种元素r且所含元素质子数均不超过18.回答下列问题.说明图中不含r的 Template




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tomski在如图所示的转化关系中abc是中学化学中常见的物质都含有同一种元素r且所含元素质子数均不超过18.回答下列问题.说明图中不含r的 coloring