用木炭还原氧化铜的实验如图.�酒精灯加灯罩的目的 �刚开始预热试管�中立即产生气泡但石灰水不变�浊原因是 �停止加热时应先将导管从 Template




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tomski用木炭还原氧化铜的实验如图.�酒精灯加灯罩的目的 �刚开始预热试管�中立即产生气泡但石灰水不变�浊原因是 �停止加热时应先将导管从 coloring