???“??????” ?????????

????:??????:?????v

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

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

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

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