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

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

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

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

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

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