单项选择题
A.主跨与边跨B.边跨与主跨C.主跨与总体跨长D.总体跨长与主跨
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]