?? ????25???????? ??????80%??
????:1???????????:??????v
2????????
3????????150???
4??????
5???????????
???????25???????,??“???”???????470?????,??????????80%???????????
?????,??????1999?470.2??????????????????,??????????????????????????????????????,???????????????????????,??100%??????,?????????????????????????????????????????
??1?,???5000??????,?????99%?
(??? ?? ????)
??????????:?????????????