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