19.如图中 和 表示不同元素的原子由图可以获得的信息是 A.反应后生成两种物质b.参加反应各物质的分子个数比为14c.反应前后原子的 Template




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tomski19.如图中 和 表示不同元素的原子由图可以获得的信息是 coloring