下列有关实验的说法不正确的是 A淀粉胶体中混有氯化钠杂质可用半透膜做渗析实验提纯b测定未知液的ph时应该用干燥的ph试纸否则 Template




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tomski下列有关实验的说法不正确的是 a淀粉胶体中混有氯化钠杂质可用半透膜做渗析实验提纯b测定未知液的ph时应该用干燥的ph试纸否则 coloring