10.某学生课外活动小组利用下图装置做如下实验在试管中注入某无色溶液加热试管溶液颜色变为红色冷却后恢复无色则原溶液可能是 Template




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tomski10.某学生课外活动小组利用下图装置做如下实验在试管中注入某无色溶液加热试管溶液颜色变为红色冷却后恢复无色则原溶液可能是 coloring