E N D
1. ?2? ???????? ???????????????????????????????????????????AutoCAD 2004????????????
2. 2.1 ????????
2.2 ????????
2.3 ??????
2.4 ????????? ????????
3. 2.1 ???????? 2.1.1 ????
1.??????
2.????
3.??????
4. 2.1.2 ???????
1.???????????
(1)????2-1??2-2?????????2-1?????????,??????????????????
(2)????2-3?????????,????????,????????