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

3??140??150?????????????150??????——???????150??200??

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

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

6,1000??1200????????????1096??——???????1400??(?????991?????????1200)

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7??(???????)??????3400????3500??????????????????????????????????ū??

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

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