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0.9立方米 冰的質量M冰=ρ冰V冰=0.9g/cm3×1m3=900kg/m3×1m3=900kg 冰熔化成水後,水的質量M水=M冰=900kg. 水的體積V水=M水/ρ水=900kg/(1000kg/m3)=0.9m3=0.9立方米
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