Who thinks that a scientist will become famous if he makes the wildest guess at longevity、

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• 1According to Steve Austad at the University of Texas, ________.

  A.the average human life span could be 110

  B.scientists cannot find ways to slow aging

  C.few people can expect to live to over 150

  D.experts aren’t sure how long one can live

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• 2What does the story of Jeanne Calment prove to us？ ________

  A.People can live to 122.

  B.Old people are creative.

  C.Women are sporty at 85.

  D.Women live longer than men.

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• 3Who is the article meant for、

  A.School lunch suppliers.

  B.Headmasters.

  C.Students.

  D.Nutritionists.

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• 4What is the main idea of the passage？

  A.Food served in the US is the best of all.

  B.Schools should try to satisfy the needs of students.

  C.Schools serve different foods from country to country.

  D.School children all over the world dislike their school food.

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• 5We can infer from the passage that ________.

  A.a typical menu from a US school is made up of enough nutrition

  B.most students in South Africa eat their lunches at home

  C.many schools in Australia have traffic lights outside their schools

  D.you can have whatever you like in school canteens in Japan

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• 6What can we infer from the last three paragraphs？ ________

  A.Most of us could be good at sports even at 120.

  B.The average human life span cannot be doubled.

  C.Scientists believe mice are aging at a slower speed than before.

  D.C.Scientists believe mice are aging at a slower speed than befor

  E.D.New techniques could be used to change flies into a new species.

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