下图是实验室制取气体的常用装置1写出一个用a装置制取o2的化学方程式 2b和c装置均可制取co2与b相比较c的主要优点是什么 Template


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tomski下图是实验室制取气体的常用装置1写出一个用a装置制取o2的化学方程式 2b和c装置均可制取co2与b相比较c的主要优点是什么 coloring