?? ??????????????????
????:1????????:??????
2???????sn
3??????????
4???????????
5?700?????????
???11??25????? (?????????? ???????????????)???11????????24???????
??,??,??
???,????????,???????????????????,?????????????????????????,?????????
???????7?????????????????????????30????????????????????????,??????,????????????????
???????,??«???????????»????13??????“???”“??????????????????????????????”“??????”????
??“????????????????”“??????????????”????????????,????????“?????”“????????”??
??????????????1998?,???????????????????????????????????????????(????????????????????) ?????:???????????????