遵义某汽车配件厂新购进了一批黄铜.为了测定这批黄铜中铜的质量分数化验人�将取来的样品先加工成粉末然后利用该粉末与稀硫酸在烧杯内�生反应.分 Template




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tomski遵义某汽车配件厂新购进了一批黄铜.为了测定这批黄铜中铜的质量分数化验人�将取来的样品先加工成粉末然后利用该粉末与稀硫酸在烧杯内�生反应.分 coloring