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

2???????500?4???

3????????????

4???????

5???????

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

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

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

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

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