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

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

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

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

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