单项选择题
A.图形组锁、Graphic Group LockB.ACS 平面锁、ACS Plane LockC.ACS 平面捕捉锁、ACS Plane Snap LockD.隐含开关锁、Imply Relationship
A.MicroStation 、ProjectWiseB.MicroStation、FacilitiesC.AutoCAD、ProjectWiseD.AutoCAD、Facilities
A..dwg、.dxfB..3ds、.fbxC..ifc、.skpD.以上皆可