单选:在达西公式hf=[λ(L/D)](v2/2g)中,"D"表示的是()。 题目分类:安全生产法及相关法律知识 题目类型:单选 查看权限:VIP 题目内容: 在达西公式hf=[λ(L/D)](v2/2g)中,"D"表示的是()。A.管道长度B.水力半径C.沿程阻力系数D.管道直径 参考答案:
In nearly every town or city center in the UK,on most days of the week you can f In nearly every town or city center in the UK,on most days of the week you can find one or more peop 分类:安全生产法及相关法律知识 题型:单选 查看答案
Mrs. Smith persuaded her husband __________ the right thing. Mrs. Smith persuaded her husband __________ the right thing. 分类:安全生产法及相关法律知识 题型:单选 查看答案