????????????? ????4.6???

????:????150???:????t???

????????2?????????????????4????? (??? ??????????)??????????????“??”“?? ????”???????????????240????,????????????4??????????????,????4.6?????????

??????????????????,??????31???????2220??,??16.6%?16.5%,??????2550????????240?;?????6?12??????????????????,????1.5????,?45%,????8%?

???????????,????????????????????????2100????,???,??1634????????5.1%,?????160.1????????(?????,??????????)???????????42.9%?

??????,????,????????,“????+”??,?????????,“????”????????,?????100%?

???,???,????“???”????,????????????“???????????”?????????273???,?????(????)20??,????????????????(????) ?????:???????????