?? ?????? ???????????????
????:1???????????:??????
2??????????
3?????499?
4?????????
5?????600??
??2??????????????2?? (????????????? ?)?(???????????????????)????????????2????????????1?????,???????????????????????
?????????????,??????????????????2?????1?,????????????????????????????,???
????,?????????????????,???????????????????????,??
??????????????2?1??????,????90%????????????????????
2?2??????,???????????????????????????,??(????????????????) ???:??????