某实验创新小组对木炭还原氧化铜的实验进行了改进其操作步骤如下�取一片铜片用砂纸除去其表面的氧化物使其表面�光亮的紫红色�用酒精灯将上述 Template




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tomski某实验创新小组对木炭还原氧化铜的实验进行了改进其操作步骤如下�取一片铜片用砂纸除去其表面的氧化物使其表面�光亮的紫红色�用酒精灯将上述 coloring