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1.??????????????????????????3?ξ?????

2.1??2 ?????????????????????2.0

3.2??1 ?????????1.6????????е????????????????100????????????????????????????????????????????

4.???????100???????????????

5.?e?????л?1-2????ξ?????????????????????????????2??????????1.6???1.9????1,6???15.6?????????????Ρ???e??????????????????????????????????????????????

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