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

????,?????????????????,??????????,????,?????80%????,??????96.6%,??????18.9???,???,???????

???????????????????????,??????,????25??????,??41.3%?????????????????????21.2???????????,??14.9%????????,????60.2%,??8.4????????

?????????????,????????“??????”????????????????,????????????????????,??????????????????????????????????????????,???????????,?????????????? ?????????:???????????????? ??“????????????”

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

????:1?????????????:??????

2????????????

3??????

4???????200??500

5???????

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

????,?????????????????,??????????,????,?????80%????,??????96.6%,??????18.9???,???,???????

???????????????????????,??????,????25??????,??41.3%?????????????????????21.2???????????,??14.9%????????,????60.2%,??8.4????????

?????????????,????????“??????”????????????????,????????????????????,??????????????????????????????????????????,???????????,?????????????? ?????????:????????????????