?? ????????25?? ??????80%????
????:1???????:???????????
2???????????
3?????
4???????????
5??????????
?????????25??,?“??????????”????????????470?????,??????????80%????
???,?????1999???????470.2???????????????,??????????????????????????????????????,???????,???100%???,????????????????????????????????????
??1??????????????,??5000??,???????99%?
(????????? ??? ??????)
?????????????????????:?????