?? ??????????????????
????:1?????????????:??????
2????????????
3??????
4???????200??500
5???????
??? ??????????
????,?????????????????,??????????,????,?????80%????,??????96.6%,??????18.9???,???,???????
???????????????????????,??????,????25??????,??41.3%?????????????????????21.2???????????,??14.9%????????,????60.2%,??8.4????????
?????????????,????????“??????”????????????????,????????????????????,??????????????????????????????????????????,???????????,?????????????? ?????????:????????????????