MoveL Offs (p1, 0, 0, 50 ), v1000, fine, tool1; MoveL p1, v1000, fine, tool1; MoveL Offs (p1, 150, -50, 0 ), v1000, fine, tool1; MoveL Offs (p1, 150, 50, 0 ), v1000, fine, tool1; MoveL p1, v1000, fine, tool1; MoveL Offs (p1, 0, 0, 50 ), v1000, fine, tool1; 执行完上述程序后,机器人在p1点所在的水平面内画了一个( )。