?????????“??????” ???

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

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

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

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