??
?2??????????????????????????????????????2?????????? ???(BBC)???,?????????????2???1???,??,?????25%???,????????????????
??????????????,????????,???1550???????????????25%????300?2??????????4????????????????,1250??21???
??????????,??????????,?????
??,????,??????????????????25%?????????,?????10%?
????????????,????????,?,???????? ????:????????????
?????????
?????????????:??1550?????????25%?????????????????