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

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

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

???,?,???

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

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