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					The gold standard study by Harvard and Columbia University scholars found that even in high-poverty schools, teachers consistently had a huge positive or negative impact. 出自-2016年6月阅读原文
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					In a study of older people with sisters and brothers, psychologist Debra Gold of the Duke Center for the study of aging and human development found that about 20% said they were hostile or indifferent to ward their sisters and brothers. 出自-2014年6月听力原文
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					A man who had recently reconciled with his brother told Gold there's something that lets older people to put aside bad deeds of the past and focus a little on what we need now, especially when it's sisters and brothers 出自-2014年6月听力原文
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					What does the study by Debra Gold find about older people? 出自-2014年6月听力原文
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					What did the man who had recently reconciled with his brother tell Debra Gold about older people 出自-2014年6月听力原文
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					Gold found that as people age, they often become more involved with and interested in their sisters and brothers. 出自-2014年6月听力原文
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					And Burke says that actually does seem to help, based on randomized studies—the researchers' gold standard. 2016年6月六级真题(第二套)听力 Section C
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					Clothes and other items that need to be tried on such as diamond rings and gold necklaces are generally not suited to virtual retailing, and, of course, items with a low value- to-weight ratio. 2015年12月六级真题(第一套)听力 Section C
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					The materials from e-waste include iron, copper gold, silver, and aluminum—materials that could be reused, resold, salvaged, or recycled. 2019年6月六级真题(第二套)阅读 Section B
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					The next year, he won three gold medals in the winter Olympics, a record in ski racing that has never been topped. 2019年6月六级真题(第一套)听力 Section B