如右图所示a处通入cl2关闭b阀时c处湿润的红色布条无变化 打开b阀时c处湿润的红色布条褪色则d中的溶液是 A 浓h2so4 b Template




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tomski如右图所示a处通入cl2关闭b阀时c处湿润的红色布条无变化 打开b阀时c处湿润的红色布条褪色则d中的溶液是 a coloring