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某输水长管管长L=2km,若起点到终点高差为△h=10m,沿程水头损失为hf=40m,则水力坡度J为( )。

单选题
2021-09-01 23:39
A、0.025
B、0.02
C、0.015
D、0.005
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正确答案
B

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