12.下列实验问题处理方法正确的是 �用ph试纸测溶液ph时将试纸用水润湿再蘸取待测液 �实验中点燃co前应首先检验co的纯度 �实验室的 Template




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tomski12.下列实验问题处理方法正确的是 �用ph试纸测溶液ph时将试纸用水润湿再蘸取待测液 �实验中点燃co前应首先检验co的纯度 coloring