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1??10??20????????12??(???????7??)

2??40??60????????40????——??????????????????60????80????

3??130??150?????????????150??????——???????150??200??

(??????????????90????100??????????????130???????3???????????????)

4??280??350????????????290??——???????350??450??

5,700??800????????????790??——???????800??900??(??????????1000????)

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???????6?????1300??1400??????????????????????1500??1600??????????????

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