根据如图所示氧气的性质实验请回答以下问题.1实验中b装置观察到的现象是 .2通过a装置进行实验时的现象证明集气瓶中的气体是 .3 Template




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tomski根据如图所示氧气的性质实验请回答以下问题.1实验中b装置观察到的现象是 .2通过a装置进行实验时的现象证明集气瓶中的气体是 .3 coloring