The research,led by Robin Dunbar,head of the Institute of Cognitive and Evolutionary Anthropology at Oxford University, showed t

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问题     The research,led by Robin Dunbar,head of the Institute of Cognitive and Evolutionary Anthropology at Oxford University, showed that men and women were equally likely to lose their closest friends when they started a new relationship.
    Previous research by Dunbar’s group has shown that people typically have five very close relationships—that is,people whom they would turn to if they were in emotional or financial trouble.
    "If you go into a romantic relationship,it costs you two friends. Those who have romantic relationships, instead of having the typical five ’ core set’ of relationships only have four. And of those,one is the new person who’s come into their life," said Dunbar.
    The study,submitted to the journal Personal Relationships, was designed to investigate how people trade off spending time with one person over another and suggests that links with family and closest friends suffer when people start a romantic relationship.
    Dunbar’s team used an Internet-based questionnaire to quiz 428 women and 112 men about their relationships. In total,363 of the participants had romantic partners. The findings suggest that a new love interest has to compensate for the loss of two close friends.
    Speaking at the British Science Festival in Birmingham,Professor Dunbar said: "This was a surprise for us. We hadn’t expected it. If you don’t see people, your emotional engagement with them drops off and does so quickly. What I suspect is that your attention is so wholly focused on the romantic partner you don’t get to see the other folks you had a lot to do with before, and so some of those relationships start to deteriorate. "
    The questionnaire allowed people to mention whether any of their closest confidants (知己) were "extra romantic partners". In all,32 of those quizzed mentioned having an extra love interest in their life ,but these people did not lose four friends as might be expected. Instead,the extra person in their life bumped their original romantic partner out of their innermost circle of friends.
    In a separate study, Dunbar’s team looked at how men and women maintained friendships on the social networking website Facebook. They found that women’s Facebook friends were more often friends from everyday life that they spent time with, while men tended to collect as many friends as they could, even if they hardly knew them.
    "Boys seem to be in a competition to see who can have the most Faccebook friends and that could be a form of mate advertising. One of the cues women use for male quality as a mate is the number of other girls chasing them,so signing up lots of girls as Facebook friends seems to be a good idea," said Dunbar.
Why do men sign up more girls on the Facebook?

选项 A、They want to compensate for the loss of close friends.
B、It is a good way to show the male attractiveness before women.
C、It can help them to gain more attention on the social networking sites.
D、They can pick out the most favorable candidate for their girlfriends.

答案B

解析 事实细节题。此题考查男性在网络中结识更多异性朋友的原因。定位句指出原因就在于,女性会根据追求该男性的女人数量来判断一个男人的品质。故B)“在女性面前展现男性魅力”为答案。A)“用来弥补失去的亲密朋友”、C)“帮助他们在网络上获得更多关注”和D)“能从中选出适合交往的女朋友”,文中均未提及,故排除。
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