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質量不變,冰的質量為(0.9)千克 0.9千克的水的體積Vo=m/p水=0.9kg/(1kg/dm^3)=0.9dm^3 冰的體積V=Vo+0.1=1.0dm^3 冰的密度p=m/V=0.9kg/(1gm^3)=0.9kg/dm^3)=900kg每立方米
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