????:1???????:?????98??

2???????????

3????????

4????????

5???????

??2?5??? ??“?”5????????????,?????3????????????4???4???7.3????????????,??9??????

???????????????????,????“???”?

?????????????????????????,?(??S)??,???????????,??????????????????,???5???

??,??,??????????????????

????“??”??,????????????,1???21??2?????3????????142?????,?25????????2?????2?????,??????????????????????65?????46.3%,???68.6%?

?,????????????????,???????,??(??) ??????:?????????????????