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

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

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

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

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

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