??????“?????????” ???

????:???????????:??????

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

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

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

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