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

2?????

3?????sn??

4???80?????

5???????

7??14???,“?BA”?????,???????????? ? ? 7?14??,“?BA”?????????????????????????????,????????? ????????? ? 7?????????????????????????????14?,“?????????BA”?,?????? ? ????????????????????????????? 7?????????????????????????????14?,“?BA”?????,?????? ? ??? 7????????????????14?,“???BA”?????,??? ????????????????????????????? ?? ??????????:??????