????:1?????????:??????????

2???qq?

3???????

4??????????

5??????????

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

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

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

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

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