单项选择题
A.90°B.45°+Φ/2C.45°D.45°-Φ/2
A.楔形滑动B.平面滑动C.倾倒破坏D.圆弧滑动
A.Rt=(6-10)RcB.Rc=(1-4)RtC.Rt=(1-4)RcD.Rc=(6-10)Rt