下列物质的用途只是利用其物理性质的是 A.把铜抽成丝作电线b.氮气可用作食品保护气c.用醋酸和澄清石灰水证明鸡蛋壳的主要成分是碳酸盐d Template




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tomski下列物质的用途只是利用其物理性质的是 a.把铜抽成丝作电线b.氮气可用作食品保护气c.用醋酸和澄清石灰水证明鸡蛋壳的主要成分是碳酸盐d coloring