?? ??? ????:??30????????????
????:1???????:?????????
2?????
3?????????100??
4????????
5??????v
???????1????????????30? ?????(NBC)30???????????????????????,????????????30??????29?????,????????????,??“???”???????????????????????
??1??29?????,????,??????????????1?30?????? ? ??????????,?60????????????4?????????????????????,????????3????????????????
????30???,??????????????????3?????????????????,?????300??,???????????,????
NBC??????????????????????,????,?????
????:???