?????????“???” ??????

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

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

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

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