?????????“??????” ???

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

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

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

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