如图所示试管内装有三分之一的水试管口用软木塞塞紧再用酒精灯对试管底加热.一段时间后�现试管内的水产生大量的气泡水沸腾最后软木塞被冲出 Template




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tomski如图所示试管内装有三分之一的水试管口用软木塞塞紧再用酒精灯对试管底加热.一段时间后�现试管内的水产生大量的气泡水沸腾最后软木塞被冲出 coloring