单项选择题

无压圆管均匀流的重要特征：其过水断面面积和湿周随水深的变化而改变。当h>d/2时，随着水深增加，水面变宽，过水面积增加迅速，但湿周增加逐渐减慢；当h<d/2时，水深增加使水面宽度减小，过水面积增加减缓，而湿周增大加快。

A.正确
B.错误

<上一题目录下一题>

热门试题

未分类题

According to the passage, ______ will narrow the county's financial shortfall.A.to reduce the number of studentsB.to lessen healthcare costsC.to increase tax rateD.to qualify a three A bond rating

A.A.to
B.to
C.to
D.to

单项选择题

One of the major shortcomings in negotiation occurs when negotiators make an offer that is too generous and is immediately accepted by the counterparty. This negotiation trap is called: （）A.egocentrismB.the confirmation biasC.the winner’s curseD.the mixed-motive negotiator

相关试题