下图是某同学设计的实验装置图回答下列问题1在给cuo加热前要先通入一氧化碳其目的是 2实验进行时在a处看到的现象是 说明 Template




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tomski下图是某同学设计的实验装置图回答下列问题1在给cuo加热前要先通入一氧化碳其目的是 2实验进行时在a处看到的现象是 说明 coloring