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  3. My Space and other Web sites have unleashed a potent new phenomenon of social networking in cyberspace,【1】at the same time, a gr

My Space and other Web sites have unleashed a potent new phenomenon of social networking in cyberspace,【1】at the same time, a gr

admin2011-03-11  44
问题     My Space and other Web sites have unleashed a potent new phenomenon of social networking in cyberspace,【1】at the same time, a growing body of evidence is suggesting that traditional social【2】play a surprisingly powerful and under-recognized role in influencing how people behave.
    The latest research comes from Dr. Nicholas A. Christakis, at the Harvard Medical School, and Dr. James H. Fowler, at the University of California at San Diego. The【3】reported last summer that obesity appeared to【4】from one person to another【5】social networks, almost like a virus or a fad. In a follow-up to that provocative research, the team has produced【6】findings about another major health【7】: smoking. In a study published last week in the New England Journal of Medicine, the team found that a person’s decision to【8】the habit is strongly affected by【9】other people in their social network quit—even people they do not know. And, surprisingly, entire networks of smokers appear to quit virtually【10】.
    For【11】of their studies, they【12】of detailed records kept between 1971 and 2003 about 5,124 people who participated in the landmark Framingham Heart Study.  Because many of the subjects had ties to the Boston suburb of Framingham, Mass. , many of the participants were【13】somehow—through spouses, neighbors, friends, co-workers—enabling the researchers to study a network that【14】12,067 people.
    Taken together, these studies are【15】a growing recognition that many behaviors are【16】by social networks in【17】that have not been fully understood. And【18】may be possible, the researchers say, to harness the power of these networks for many【19】, such as encouraging safe sex, getting more people to exercise or even【20】crime.
选项 A、reasons
B、keeps
C、good
D、purposes
答案D
解析 本题要求考生根据上下文选择符合原文含义的名词。该名词与介词for搭配，作本句的目的状语；该名词后有若干例子说明该名词所代表的具体信息。本句的意思是：可以驾驭社交圈的力量以达到不同的……，如鼓励安全性行为等。可见，本句是基于全文主旨的展望，希望通过交际圈的影响，产生不同特定的行为，即驾驭社交圈的力量的目的。因此，D选项purposes(目的)正确。A选项(for...)reasons，B选项(for)keeps及C选项(for)good均意义不符。
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