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

????:????????:???????50???

?????2???????????3????????????????? (? ???????????)????????,??????????????????,??????

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

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

???,1???????????????28??0???????????????2???????3??15?????????,?2.6??,????????????????44%,???,??85.7%,?8.3%,?6%??,?,???1400????????????????????????

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

???:???????????