????????????

??

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

???,???“???”?

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

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

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

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

?????????

??????????????????????

????????