????:?????????1550????????25%??

???2?????????????2?????????? ????????????(BBC)???,?????????2????????1?????,???????,????????????????25%???,???

???,????????,???????????????1550?25%???????300??????????2?????4???,1250?21???????????????????????????????????????

??????????????,?,????

???????????,?,?????????????????????25%??????????,???????10%?

??,???????????????,??,???? ?????:???