酒精质量是:100g酒精密度是:0.8×103kg/m3=0.8g/cm3∴酒精的体积是:V= m ρ = 100g 0.8g/cm3 =125cm3=125mL∴量筒的量程应大于125mL,即选量程为250mL的.故选B.