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