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2?8??????11???????????????????50??,?2????????????????

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2?8?16????,????17?????

???????,??????????????60???????????????????????????,??????????????80???7???

2??8??,??200?,?????????

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2??????9??,????????????,????????,?,?????????????????1.2???????10????20?,?100?????????,?????????10??(??????????? ?????? ?? ???? ???? ??????????????????)

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