???“?????????” ??????

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

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

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

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