A.直立 B.俯斜 C.仰斜 D.背斜
A.h=1.33mE=89.76kN/mB.h=1.33mE=52.64kN/mC.h=1.33mE=80.64kN/mD.h=2.67mE=52.64kN/m
A.20° B.30° C.10° D.0°