?? ??? ???? ???????????????????
????:1??????????:??????
2??????
3????????sn
4?????
5???????????
?(12?????3???)9?,?????????????????????????????????,???
?,???????????,????145?????,??5000???????????????,???16.64??????????????,??
?????????10???31?????????,????????????????????????,??????????????????,???????????,????????????????????????
????????,??,????????39.07????????,???????11.185??,?,?100????????9315??,??????????????????
(????? ????) ??????????:??????????