某化学兴趣小组用如图燃烧红磷的方式做空气中氧气体积成分测定实验时�现进入集气瓶内的水超过了$frac{1}{5}$.全组人�为此纳闷请问 Template




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tomski某化学兴趣小组用如图燃烧红磷的方式做空气中氧气体积成分测定实验时�现进入集气瓶内的水超过了$frac{1}{5}$.全组人�为此纳闷请问 coloring