A.(1.2~1.5),(1~1.2) B.(1~1.2),(0.6~1) C.(0.6~1),(1~1.2) D.(1~1.2),(1.2~1.5)
A.30% B.50% C.70% D.100%
A.兩端 B.跨中 C.梁1/3處 D.梁1/2處