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

2???????

3?????92?95?98?

4?????????

5???????

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

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

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

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

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