??????“???” ?????????

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

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

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

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