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参与互动原因是他攻克了困扰国际数学界20余年的“西塔潘”猜想。
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这种产业结构的弊端在于，一是容易受国际能源等大宗商品的价格波动影响，比如中国宏观经济研究院的数据显示，受此影响，2013年至2016年北方省份的PPI（生产物价指数）下降幅度就远超过南方地区，这一下降严重影响了北方工业企业的生产利润；二是在去产能背景下，制造业投资需求萎缩。工信部数据显示，2015年，北方地区完成炼铁、炼钢、焦炭、电力去产能任务分别占全国的64.5%、73.6%、83.8%和78.9%。
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经济新闻精选：
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