????????2????3????????? ?????(BBC)?????(NBC)?????????,???2??2????,??,???“?????????”????????????????????????????,????“??”?
??????:????
????????????,????????????????,“???????(???????)?,??????????????,??,?,??”
???,?,“????????????????????,??????”
?????,??,?????,???,???????????????,??????????“??”?
????????????,“??,?????????????????”
??????????,“?????????????????????????????????,???????????????,??,?????”
?????:????
?????????????????????
????????????????????
???:????????????????
???100?????????????0.01?
????:????????????????
????????????470?:???3?1?
????????????????????
???1????????????????
?????????68?????????????
?????????????????????
???????????????
???100?????????????0.01?
??:???????????????????
??:??????????????????
???1????????????????
??:?????????????
?????????????????
??????????????????????
?!????????????
???????100??????????1500
??????:???????????????
??:??????????????????????
??:??????????????????????
????:?????????????????????…
????15????????????:????