在托盘天平两端的烧杯内分别盛有等质量等质量分数的足量稀硫酸调节天平至平衡现�左边烧杯中加入65g铁钉同时�右边烧杯中加入65g锌 Template




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tomski在托盘天平两端的烧杯内分别盛有等质量等质量分数的足量稀硫酸调节天平至平衡现�左边烧杯中加入65g铁钉同时�右边烧杯中加入65g锌 coloring