?? ??????:???“????”
????:1?????????????:?????????
2????????
3?????600?????
4??????????
5???????
??2??3???????????????? ????(NBC)?,???????????????????2????????2?,???“?????????????”?
???:???,???,“?????????,?????????”,???,“??????????,????,?????”
???????????????????????????????????????????2?1???,????,????????????25%????,???,?????
???????????????????:????????