?????????“???” ??????

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

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

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

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

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