以OC为半径画弧[ ]
错误
造成堤岸坍塌险情的原因是什么?
等边角钢截面已知形心为C,对y轴的惯性矩Iy=3175cm4,Imax=5045cm4,(图5-5-11),则Imin等于:()
A.560cm4
B.935cm4
C.1305cm4
D.1870cm4