???“??????” ?????????

????:?????????:????200?????

???????????????2?????18????????????? (?????????????? ?)????????18?????,???????????????,??“?”,??????,???????????????“??”???????????,?????,????

???????“???”??????,????????,?,???????50??(?????????????????????)??????????????,???????????500?????????????,???1-3?,???????????0.3%-0.5%/??????????????????,??????????,????????????,?????,????,???????

?????????,“???”????????????????????????????,????????????????,????????,????????????20??????????(????????)?0.3%/??,20???????0.5%/????????????????????????????????????????????????????????????????????????????????

?????,????????“???”???????????????20??(?)?,??????????????20??????,???????,?????????????????????????????????????(??????????????????) ???:??????