??????“???” ?????????

????:????wx:????

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

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

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

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