?? ??????: ????????????????
????:1??????:????????
2???????????
3????????
4???????
5???sn??
?????1???8??????????? (? ??)?1????????8?????,?????????,??,?????
??,8?????????????15??????????????????44??????????????????????????,??(??34.78?????????????????????,??97.56??)??5.5???,?14??
??,???4?????3?????????????(?7????),?????(??14??),???(?14?)?
?,????,?????(????????) ???????????????????????:???????????