根据以上内容,回答31-45题。
Who had the greatest influence on people who became obese?
A.Their friends.
B.Their neighbors.
C.Their family members.
D.Their colleagues.
32、Which 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.
33、According 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.
34、Which factor of becoming obese is not mentioned in this report?
A.Social contact.
B.Genetic information.
C.Life style.
D.Environmental influences.
35、In what way is obesity contagious and epidemic?
A.Social networks let the obesity spread rapidly.
B.1ndividuals 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 time.
参考答案：ACDCA
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