A.10kN·m(右侧受拉) B.10kN·m(左侧受拉) C.12kN·m(左侧受拉) D.12kN·m(右侧受拉)
A.P/2 B.P/4 C.-P/4 D.0
A.1.5 B.2 C.2.5 D.3
A.△143,△325,基础 B.△143,△325,△465 C.△143,杆6-5,基础 D.△352,杆4-6,基础
A.ql2/2 B.3ql2/8 C.7ql2/8 D.ql2/8
A.-10kN·m B.-5kN·m C.0 D.5kN·m
A.0.5kN·m(上侧受拉) B.0.5kN·m(下侧受拉) C.1kN·m(上侧受拉) D.1kN·m(下侧受拉)
A.1:1:1 B.1:4:3 C.4:1:3 D.3:12:4
A.几何不变 B.几何常变 C.几何瞬变 D.几何不变或几何常变或几何瞬变
A.1/2,0 B.4/7,0 C.4/7,1/2 D.4/5,-1