2. 职称英语
  3. Nature magazine concluded that the loss of a key segment of DNA can【C1】_____

Nature magazine concluded that the loss of a key segment of DNA can【C1】_____

游客2023-11-17  45
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." [br] 【C3】
选项 A、on occasions
B、on occasion
C、at occasion
D、at occasions
答案 B
解析 固定搭配题on occasion“有时，间或”；on occasions常用作on…occasions在某种情况下，其余用法均不存在。
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