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

??

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

??????,????????????“??”?

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

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

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

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

?????????

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

????????