?? ??????:???“????”
????:1???????:??????
2????????
3??????????????
4???????????
5??????????????
????2?3????????? ?(NBC)??,??????????????2?????????????2????????????????,???????????????????“???”?
???:???????????,???,“?,?”,?????????,“????????,????,?????”
????2???1???,??,????????????????????????????25%??????????????,????????????,???????????????????
?????:???