?? ????:????????????42.9??? ?4.32???
????:1?????:?????
2???????????
3?????????
4???300???????
5???????????
?????????9????30?? ??????????????30????“??????????”?,??????,????????????????,???42.9?????????????4.32???????,???????16.8%??????17.1%,???????2019??????????,???????,???,??????????,??????????
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