下列化学实验叙述正确的是a.实验室从海带中提取单质碘的步骤取样→灼烧→溶解→过滤→萃取 b.将饱和fecl3溶液滴入沸水继续加热煮沸至出现 Template




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tomski下列化学实验叙述正确的是a.实验室从海带中提取单质碘的步骤取样→灼烧→溶解→过滤→萃取 b.将饱和fecl3溶液滴入沸水继续加热煮沸至出现 coloring