??????“???” ?????????

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

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

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

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