如图所示回答下列问题1实验开始后大试管内有何变化请写出此处�生反应的化学方程式2请指出这位同学所用实验装置的不足之处.3 Template




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tomski如图所示回答下列问题1实验开始后大试管内有何变化请写出此处�生反应的化学方程式2请指出这位同学所用实验装置的不足之处.3 coloring