甲乙为短�期同一主族元素组成的单质丙丁为氧化物它们存在如下转化关系则满足条件的甲和乙分别为 a.铝和铁b.碳和硅c.镁和碳d.氢气和 Template




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tomski甲乙为短�期同一主族元素组成的单质丙丁为氧化物它们存在如下转化关系则满足条件的甲和乙分别为 a.铝和铁b.碳和硅c.镁和碳d.氢气和 coloring