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According to Mark Saul, the director of competitions for the Mathematical Association of America, not a single African-American or Hispanic student—and only a handful of girls—has ever made it to the Math Olympiad team in its 50 years of existence.
出自-2017年6月阅读原文
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It had, apparently, been fished out of existence; and the once mighty Newfoundland fleet now gropes about frantically for crab on the sea floor.
出自-2016年6月阅读原文
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Researchers recently found kimberlite ( ' , 金伯利岩) deposits hinting at the existence of diamonds.
出自-2016年12月阅读原文
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Advertising informs consumers about the existence and benefits ofproducts and services and attempts to persuade them to buy them.
出自-2015年12月听力原文
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They pose a serious challenge to future human existence.
出自-2013年12月阅读原文
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What does the man say threatens the existence of railways?
出自-2010年12月听力原文
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According to Mark Saul, the director of competitions for the Mathematical Association of America, not a single African-American or hispanic student—and only a handful of girls—has ever made it to the Math Olympiad team in its 50 years of existence.
2017年6月六级真题（第三套）阅读 Section B
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Because if we aren't, we won't be providing much value in future ecosystems, and that may put in question the foundation for our existence.
2019年6月六级真题（第三套）阅读 Section C
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Researchers recently found kimberlite(金伯利岩) deposits hinting at the existence of diamonds.
2016年12月六级真题（第三套）阅读 Section B
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The 28 existence of such ideals, without the tempering of the reality of a job or profession, rapidly leads adolescents to become 29 intolerant of the non-idealistic world and to press for reform in a characteristically adolescent way.
2016年6月六级真题（第三套）阅读 Section A
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They lack water-storing structures, and their existence on rock faces prevents them from tapping groundwater, so they have instead developed the ability to change their metabolism.
2018年6月六级真题（第一套）阅读 Section B