??????????????53%??

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??????????(?????????????):6?????????????17??????????????????30?????????????????????,????????????????,53%???????????

????,?????3.31??????????,????“??????”?????????“???”??“??????????????”??????4.8???????,??12.8???????????,????1978????5.05%?13.84%???4??,??????515????????????1000??????????,??,2019????????2000??40%????????????????,????????,4.5???

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