???“??????” ?????????

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

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

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

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