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

2??????????????

3??????????

4???????

5????????

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

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

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

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

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