??????“?????????” ???

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

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

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

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