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

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

????????,?“???????????”?

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

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

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

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