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

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

4??????

5?????????

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?????????“??”? ??????????

??????????,??18?????????????????“??”??????????????,????????,????,???????,?;??????????????????????????7~10?????,???????12~15?????

??“?????????????????????”??5????,???,??5-10???,????????,???(????????????????????,12~13???,33~38????/???????????)?

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???,??????,??????????????????????,?????,???????????,??(250~450?????)?

??,????????????????????????????,??,???????(100~140??)?

???????????,??????????????????????????????????????????????????,?,????????????????????????(50~85?)?

??“???????????”??????,????????????,???????????????????????????????,???????,???????????,????

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??,???????????,?????????????????????,????????????20?????????????????????????,????????????????????,???

6?????8??,???????????????????????????????????????????????,??????3~6????????,??4~5??,?????????,?????,??????????

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