???“?????????” ??????

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

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

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

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

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