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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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