Online social networks are massively influential, yet we understand very lit

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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 " hardwired" to have more friends. [br] 【C5】

选项 A、conversely
B、definitely
C、properly
D、gradually

答案 A

解析副词辨析题。句意同上。根据上一题的分析，并列连词and连接的两个分句讲述的是两种完全相反的现象，因此conversely“相反地”符合文意。本句中没有涉及推断意义或时间关系，排除definitely“确定地”和gradually“逐渐地”；properly“正确地，恰当地”为方式状语，不能说明句间的逻辑关系，排除。

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Online social networks are massively influential, yet we understand very lit

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