A.圓(CIRCLE) B.視圖(VIEW) C.X軸(X) D.XY平面(XY) E.三點(diǎn)(3)
A.RULESURF B.REVSURF C.CYLINDER D.EDGESURF E.PYRAMID
A.無(wú)數(shù)個(gè) B.不超過(guò)20個(gè) C.5個(gè) D.3個(gè)