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 ply 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.
2（）
A.resource
B.database
C.communication
D.intranet
参考答案：C
解析：
[考点] 逻辑推理
考生首先要注意到，第一段提出了网络交际圈和传统交际圈的对比，并指出传统交际圈对行为的影响曾被低估，但被日益证实。空格前出现的“social network in cyberspace"和空格处出现的“traditional social...”相对应，我们可以推断，空格内所缺信息应该等同于network，这里network的含义并非电脑网络，而是交际圈落。该空格内的信息应该表达与此相近的含义，所以选择communication。
[干扰项分析] 其他几个选项均与network的含义相关，A选项为“资源”，B选项为“数据库”，D选项为“企业内部网”。但是都不能引申为“交往，交流”，与文章及段落的主旨无关。