?????????“??????” ???

????:????????????:???????

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

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

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

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