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

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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、concerned
B、excluded
C、encouraged
D、connected

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表语成分。空格前上文说“因为许多被试和弗拉明翰有渊源(had ties to),因此参与者之间也存在着某些……”;后文又以解释说明的方式罗列出了诸多关系,如夫妻关系(spouse)等。综合这些信息,可以得知,空格内所缺的名词应为“渊源”或“关系”之意,因此D选项connected为正确答案。
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