单项选择题
A.1.13 B.1.17 C.1.21 D.1.25
A.3.613kN/m;2.80kN/m B.3.437kN/m;2.80kN/m C.3.056kN/m;2.46kN/m D.2.864kN/m;2.00kN/m
A.272.0 B.200.0 C.190.5 D.139.7