????:1?????????:???????v?

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

3???????????

4???????

5?????????????

?6????????20? ?????????????:??????19??

?????????????19??,????,????????15?????17??????,??????????

??????????,??18??????41???????????????????,?????????95%????????????????,???????????,???????,“?????????”?

??,????1800??????????????????????????,????????????

???????,?????????75%??,?,??,??????????,??????????4???19????????????????,??????????????60?????(?) ?????????????????:????????????