2. 外语
  3. Nature magazine concluded that the loss of a key segment of DNA can【C1】______It said the findings might improve【C2】______of seve

Nature magazine concluded that the loss of a key segment of DNA can【C1】______It said the findings might improve【C2】______of seve

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问题     Nature magazine concluded that the loss of a key segment of DNA can【C1】______It said the findings might improve【C2】______of severe obesity—which【C3】______has been【C4】______attributed to【C5】______overfeeding. The study, of 300 children with severe obesity by the University of Cambridge and the Wellcome Trust Sanger Institute,【C6】______in Nature. Some of the children in the study had been formally【C7】______the social services "at risk" register on the【C8】______that their parents were deliberately overfeeding them. They have now been removed from【C9】______. Obesity is increasing throughout the world and is recognized as a major global public health concern.【C10】______much of the problem is【C11】______lifestyle factors such as an unhealthy diet, and lack of exercise,【C12】______are thought to be down to genetics. The latest study examined each child’s entire genome, looking for deletions or【C13】______of DNA, known as copy number variants (CNVs). Experts【C14】______believe these CNVs play an important role in genetic disease.
    Dr Matt Hurles, who also worked on the study, said: "This is the first evidence that copy number variants【C15】______to a metabolic condition such as obesity. They are already known to cause other【C16】______such as autism and learning【C17】______." He said. The fact that several of the study children have been taken out of【C18】______and returned to their parents【C19】______is disturbing in itself and must surely put an end to the claims by some【C20】______childhood obesity is a simple case of parental abuse.
    "It clearly isn’t. These families need our support."
【C17】
选项 A、slow
B、restrictions
C、adversities
D、difficulties
答案D
解析 上下文及词汇题learning difficulties“学习障碍”；adversity“逆境，不幸”，例如：A good friend will not desert one in time of adversity．好朋友不会在人遭到厄运时弃之不顾。
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