?? ????:?????????1550????????25%??
????:1????????:??92??95?
2????????
3?????????
4????????
5????????
??2??2?????????????? ??????????(BBC)????,??????????2????????????1????,?,?25%??????????,???????????
???,?,??1550??25%????????????300?????????2??????????????????????????????????????4???????????????,1250???21????
???,???????,????????????
???,???????,??????????????????????????25%?????,?????10%?
????????,?????????????,???,??? ??:?????????????????