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

??,??“??”?

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

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

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

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

??

??:???????????,??????????,??????????????