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					Winners of local contests will participate in the national math competition for free. 出自-2017年6月阅读原文
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					But will such contests, which are overwhelmingly dominated by Asian and white students from middle-class and affluent families become any more diverse? Many social and cultural factors play roles in determining which promising students get on the path toward international math recognition. 出自-2017年6月阅读原文
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					About 100,000 students around the country participate in the program's competition series, which culminates in a national game-show-style contest held each May. 出自-2017年6月阅读原文
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					Companies have also taken it upon themselves to contest each other's green claims. 出自-2016年6月阅读原文
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					The reality is that Antarctica is geopolitically contested. 出自-2016年12月阅读原文
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					About 100,000 students around the country participate in the program's competition series, which culminates in a national game-showstyle contest held each May. 2017年6月六级真题(第三套)阅读 Section B
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					The Ebro Delta, in Spain, famous as a battleground during the Spanish civil War, is now the setting for a different contest, one that is pitting rice farmers against two enemies: the rice-eating giant apple snail, and rising sea levels. 2018年6月六级真题(第二套)阅读 Section C