????:1???92?95????:????

2??????95?98?

3?????

4??????????

5??????????

?????????,????????????1??,???????????500???????????,??????????????,?????????253????

????????????,????????????,10????????????,???

?? ????????????:??????????????,??,????????????????????

??,???????????,????????????8000???????????????,???1000?????

???? ??????:????1??????????,?????????????????3.3??,??????????,?????????????,???????? ???:???