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

2?????????

3???????

4?51????????

5?????????

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

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

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

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

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