单项选择题
A.-75.25kN·m,52.04kN·m B.-90.05kN·m,64.32kN·m C.-88.27kN·m,65.06kN·m D.-91.27kN·m,68.06kN·m
A.249.52kPa B.267.47kPa C.273.82kPa D.284.31kPa