?????????“??????” ???
????????2???????18????? (?? ??????????)???????????????18????????,???????????????????,???????????????“???”,?????????????????,?????“????????”??,????????????????????????????,???
??“?????”??????,???????????????????????,???,?50???????(?????????????)?,??500???,?????1-3?,????????????0.3%-0.5%/??????????????????,????????????????????????????,???????????????,??,?,???
???,“????????????”??????????????????????,??????,?????????????????????,?????20??????????????(???)???????0.3%/??,20??????????????0.5%/???????????????????????????????????????????????????????????????????
??,????????“???”????????20?????(?)??,??20?????????,????????,??????????????????????????????????????????????(????????) ????:????????