????:1???????:??sn??

2???????

3???????

4???????????

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

????????12???????????20?(?????????????)????????????701?????????????,??????????????1233???????;?600???,?????“?????????”??33????????1000???????????????;??????????????“???”“?”“??”“???”??14??????……

20???????,????“???????”????,?????????????????

???????“???? ??? ????”???? ??????????

????????????????,????257??????????,??????????????,????????????,???

?????????????????????????????????,???????????,?,????????10???,??????????????;???,???????????“?”??,???A???????21????,????????????????????????????,4.2????“??”?

???????????,??????????????????????IP???????????????????????????????????????????????????????????????“??”?????,??????“???”“????????????”“?????”???????????????????????,??????28???????,??900??????30???“??”?

????????????????????????,“??”???,??????????????????????6??????,???????????4?????103????????????,????????,????172????

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

????,??????????????“??”,??24.26%???????????????69.92%,????,?????;???????“?????????”?????“???????”??,?????????????????????131?????,???????????????????????????“???”?????????

?????(????)

???????:??????????