A.320kN
B.340kN
C.360kN
D.380kN
[单选题]A.B.C.D.
[单选题]A.320kNB.340kNC.360kND.380kN
[单选题]A.1.5kN·mB.2kN·mC.2.5kN·mD.0kN·m
[单选题]A.0B.C.πD.