?? ??????????????(??)??????
????:1????????:?????
2??????????
3???????sn
4?????????
5???????
???9???28?????? (???????)?????????????????(????????)??????????27???“??????????,??????,?????????????????”???????????????????
???,???????????????????????????,?????,???????????
????????????,????,????????????????
????????,??????????????????????,???????????????,????????????????“???????????”,?“???????”????
??????????????????????????2008????,???????????16?,???,???,???
??????9?11????????????????????,??????????????????????????????????????????????????????????????????????8???,????(AB????????????????)????(CDE?????)?57?????(???) ????:?????????????????