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数学天才拒收100万美元奖金2003年,俄罗斯数学家格里戈里?佩雷尔曼破解了100年前提出的看似永远也无法破解的庞加莱猜想,证明任何没有洞的形状都可以形成一个球体。他被认为
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研究性学习是一种以探究经验的获得为本位的生成性学习活动,也是近年来国际教育界倡导的适应现代社会发展的新的学习理念和学习模式。它以某一特定的具体问题或主题作为探究对