题目: 某一圆形有压油管的直径为d=150mm,流速v=0.256m/s,长1km,雷诺数Re=1921,其沿程损失hF为:()A.74.25cm油柱B.74.25mH2OC.95.26cm油柱D.62.26m油柱 答案: 参考答案:A