单项选择题
A.4.5m,8.00mB.4.5m,9.00mC.5.0m,10.00mD.5.0m,11.00m
A.41.65mB.41.75mC.42.15mD.42.45m
A.270.0kNB.319.0kNC.360.0kND.382.8kN