?????????“???” ??????

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

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

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

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