A.越大 B.越小 C.不变
A.45°-φ/2 B.45° C.45°+φ/2 D.90°
A.45°+φ B.45°+φ/2 C.45° D.45°-φ/2
A.155.26KPa,162.26KPa B.162.26KPa,155.26KPa C.155.26KPa,148.61KPa D.163.7KPa,162.26Kpa
A.60KN/m B.75KN/m C.120KN/m D.67.4KN/m
