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

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

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

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

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