??????“???” ?????????

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

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

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

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