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2???????????

3???????????

4???????????

5????????

???????????6??30?????????? (??)?????????????30?????9??????????24?????????????????,????????????????????????????????(120~160??),??????????????????(??30~50?,????????60??????)????????(8????)??

29?20??30??????7????,???????????????????????????????????????790?????????????????????50??,??18.9%;41??100??,????1.0%;??????150.3??

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