??????“?????????” ???

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

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

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

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

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