2. 外语
  3. Online social networks are massively influential, yet we understand very little about the impact they have on our brains. Recent

Online social networks are massively influential, yet we understand very little about the impact they have on our brains. Recent

admin2013-08-03  51
问题     Online social networks are massively influential, yet we understand very little about the impact they have on our brains. Recently, scientists have found a direct 【C1】______ between the number of Facebook friends a person has and the size of【C2】______ brain regions. The study also shows the more Facebook friends a person has, the more real-world friends he is【C3】______to have.
    Facebook users who have a【C4】______of friends also tend to have smaller circles of friends in the real-world and,【C5】______ those who have thousands of friends on Facebook are likely to have larger circles offline, according to the study. The findings support the【C6】______ that most Facebook users use the site to【C7】______their existing, real-life social relationships, maintaining or reinforcing these friendships,【C8】______creating a network of entirely new,【C9】______friends.
    The researchers scanned the brains of 125 university-aged Facebook users,【C10】______ these scans to the size of their friend networks online and the real-world. Those with larger Facebook networks had larger amounts of grey matter in several regions of the brain. One of these regions, the amygdala, is 【C11】______with processing memory and emotional responses. Pairing this【C12】______ another recent study, the researchers show increased volume grey matter in the amygdala【C13】______ a larger network of real-world friends.【C14】______these studies show a large network of online friends also point to an increased volume of grey matter—【C15】______ information processing occurs. In addition to brain scans, the participants were asked questions 【C16】______ to compare the size of their online networks to the size of their real-world networks.
    The study【C17】______the correlation between the number of friends online【C18】______ offline. Still, it is not possible from the【C19】______to say whether having more Facebook friends makes the regions of the brain larger【C20】______ whether some people are "hard-wired" to have more friends.
【C9】
选项 A、equal
B、virtual
C、真
D、major
答案B
解析 形容词辨析题。句意同上。依照前面两题的分析，本题所在的部分，与逗号之前讲述的行为动作是相反、相对的。前文所说的社会关系是existing和real-life，而本题所在的部分中，new与existing相对，本题所需的形容词应与real-life相对，因此virtual“虚拟世界的”符合文意，且呼应前面的network。其余各项的意义均不能与real-life相对，排除。
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