A.2
B.2.5
C.3
D.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
[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