?????????“???” ??????

????:????????:??????????

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

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

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

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