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

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

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

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

????????,?????????????,???,??? ??:????????????????? ??“???????”

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

????:1????????:??92??95?

2????????

3?????????

4????????

5????????

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

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

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

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

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