Which of the following is the most appropriate definition of Flight Distance、

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• 1In what way is obesity contagious and epidemic、

  A.Social networks let the obesity spread rapidly.

  B.Individuals have genetically determined ranges of weights.

  C.Obesity can easily spread from one to another without any physical contact.

  D.Obesity can spread rapidly and extensively by infection and affecting many individuals in an area or a population at the same tim

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• 2Which factor of becoming obese is not mentioned in this report、

  A.Social contact.

  B.Genetic information.

  C.Life style.

  D.Environmental influences.

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• 3According to Dr. Nicholas

  A.Christakis, what is the explanation for friends being the greatest influence、A.Friends usually spend a lot of time together.

  B.Friends share similar eating habits.

  C.Friends are more important than family members.

  D.Friends affected each others' feelings of fatness.

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• 4Which of the following statement about a friend's influence is false according to the report、

  A.Friends had more influence than family members on people who became obese.

  B.Even if the friend lives far away, the influence still remained.

  C.People were not likely to lose weight when they have skinny friends.

  D.The greatest influence of all was between close mutual friends.

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• 5Who had the greatest influence on people who became obese'

  A.Their friends.

  B.Their neighbours.

  C."Their family members.

  D.Their colleagues.

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• 6If an animal's critical distance is penetrated, it will

  A.begin to attack.

  B.try to hide

  C.begin to jump

  D.run away

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• 7According to the passage, social distance refers to

  A.physical distance

  B.psychological distance

  C.physiological distance

  D.philosophical distance

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• 8Which of the following could best replace the word "band" in "We can think of it as a hidden band that contains the group" (in Paragraph 3)、

  A.strip of land.

  B.distance.

  C.society.

  D.B.distanc

  E.C.society.D.community.

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• 9The example of the children holding hands when crossing the street in the last paragraph shows that

  A.social distance is not always needed.

  B.there is no social distance among small children.

  C.humans are different from animals in social distance.

  D.B.there is no social distance among small children.C.humans are different from animals in social distanc

  E.D.social distance is sometimes determined by outside factors.

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