4.蜡烛在空气中燃烧只生成二氧化碳和水根据质量守恒定律可知蜡烛的成分是 A.一定含有碳元素氢元素可能含有氧元素 b.一定含有碳氢氧 Template




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tomski4.蜡烛在空气中燃烧只生成二氧化碳和水根据质量守恒定律可知蜡烛的成分是 a.一定含有碳元素氢元素可能含有氧元素 b.一定含有碳氢氧 coloring