单项选择题
A.0.1~0.2B.0.15~0.2C.0.2~0.3D.0.1~0.15
A.0.5~1.0B.0.5~1.5C.0.8~1.0D.0.6~1.0
A.仰斜式B.俯斜式C.垂直式D.平行式