单项选择题
A.0.65 B.0.70 C.0.75 D.0.82
A.83.4kN/m2 B.96.7kN/m2 C.105.7kN/m2 D.114.9kN/m2
A.10 675kN B.11 869kN C.12 960kN D.13 651kN