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 - 2011-2-27
 
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 - 1970-1-1
 
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A reasearcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with nomal or high immune-system activity. the researcher concluded from this experiment that immune system protects against mental illness as well as against physical disease.             assumptions~ B mental illness is similar to physical disease in its effects on body systems D mental illness does not cause people's immune-system activity to decrease. 
  原文给的结论immune system protects against mental illness as well as against physical disease,前文没一点提到physical disease 而结论直接就出来 physical disease 这个概念 那 我感觉明显就是B选项~assumption 才能得出这样的结论~如果是D选项 那就和physical disease  一点点关系都没有了 你怎么能得出这样的结论。。求NN 解答。。 |   
 
 
 
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