9.如下图所示在一u型管中装入滴有紫色石蕊试液且混合均匀的某溶液通直流电一段时间后u型管内会形成一个倒立的“彩虹 则u型管内的溶液可能 Template




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tomski9.如下图所示在一u型管中装入滴有紫色石蕊试液且混合均匀的某溶液通直流电一段时间后u型管内会形成一个倒立的“彩虹 则u型管内的溶液可能 coloring