In the US Nurse’ Health Study, women who slept an average of 7 hours a night_______.

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• 1What is the passage mainly about、

  A.Effects of obesity on people’s health

  B.The link between lifestyle and obesity

  C.New explanations for the obesity epidemic

  D.Possible ways to combat the obesity epidemic

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• 2The popular belief about obesity is that___________.

  A.it makes us sleepy

  B.it causes sleep loss

  C.it increases our appetite

  D.it results from lack of sleep

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• 3How does indoor heating affect our life、

  A.it makes us stay indoors more

  B.it accelerates our metabolic rate

  C.it makes us feel more energetic

  D.it contributes to our weight gain

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• 4What does the author say about the effect of nicotine on smokers、

  A.it threatens their health

  B.it heightens their spirits

  C.it suppresses their appetite

  D.it slows down their metabolism

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• 5Who are most likely to be overweight according to Katherine Fergal’s study、

  A.heavy smokers

  B.passive smokers

  C.those who never smoke

  D.those who quit smoking

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• 6According to the US National Center for Health Statistics, the increased obesity in the US is a result of_______.

  A.the growing number of smokers among young people

  B.the rising proportion of minorities in its population

  C.the increasing consumption of high-calorie foods

  D.the improving living standards of the poor people

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