??????“?????????” ???

????:????:????90????????

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

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

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

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