A.E0=52.64kN/m、h=2.67m B.E0=52.64kN/m、h=1.33m C.E0=80.64kN/m、h=1.33m D.E0=89.76kN/m、h=1.33m
A.0° B.10° C.20° D.30°
A.60KN/m B.75KN/m C.120KN/m D.67.4KN/m