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鸡蛋为什么会浮在水上
更新时间: 2020-09-26 00:00:00  

新鲜的鸡蛋,里面的空气相当少,它的比重就比水大,因此要下沉。坏的蛋由于放的时间长,一方面它的蛋白质腐败了,产生了许多的空气;另一方面蛋里的一部分水份又都从蛋壳的小孔里蒸发了,水分少了,它也就轻了,因此要上浮

关键词: 鸡蛋 为什么 水上

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