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

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

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

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

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

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