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