A.主跨與邊跨B.邊跨與主跨C.主跨與總體跨長D.總體跨長與主跨
A.0 B.0.1 C.1 D.0.5
A.[0.03,0.05] B.[0.05,0.065] C.[0.02,0.08] D.[0.05,0.08]