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

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

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