半圆形明渠如图所示,半径r0=4m,其水力半径R为:()
A . 4m
B . 3m
C . 2.5m
D . 2m
[单选题]半圆形明渠如图所示,半径r=4m,其水力半径R为()A . 4mB . 3mC . 2.5mD . 2m
[单选题]半圆形明渠,半径r0=4m,水力半径为( )。A.4mB.3mC.2mD.1m
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4
[单选题]图6-5-1所示半圆形明渠半径r0=4m,其水力半径R为( )m。图6-5-1A.2B.2.5C.3D.4