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."
【C13】
选项 A、duplications
B、classifications
C、calculations
D、multiplications
答案A
解析 词义辨析题deletions and duplications of DNA“基因缺损与复制”，下文的copy也是暗示；classification“分类”；calculation“计算，盘算”，例如：After muchcalculation they decided to give him the position of manager．经仔细考虑，他们决定让他担任经理职务；multiplication“繁殖”，例如：The multiplication of members has madeour club building too small．会员的增加使得我们的俱乐部拥挤不堪。
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