?? ????“????????????”????
????:1??????????????:??????
2???sn??
3?????????????
4???????????
5?300???????????
???,???????????“??????????”???????,???
??,????????70??“????+”??,???,??,????,????????24%???,??????????????,?????6?????????????????,??????????????????????????????????,?????????????(???????????? ?? ?????? ?? ???????????? ????????)
?????:??????