矩形渠道断面宽度4m,水深2m,流量8m3/s,渠底坡度为0.0001,其粗糙系数为()。
A.0.005
B.0.01
C.0.02
D.0.04
参考答案:B
解析:
谢才公式
。
Within the context of the UN Convention on Contracts for the International Sale of Goods, in relation to remedies for breach of contract, explain:
(a) the meaning, and rules relating to the award of damages; (6 marks)
诊断宫内早孕最可靠的辅助检查方法是
A.尿妊娠试验
B.基础体温测定
C. B型超声检查
D. * * 脱落细胞学检测
E.宫颈粘液涂片干燥后镜检