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Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______1 a stu
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______1 a stu
admin
2021-01-20
40
问题
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______1 a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has【B2】______
The study is a genome-wide analysis conducted【B3】______1, 932 unique subjects which【B4】______pairs of unrelated friends and unrelated strangers. The same people were used in both【B5】______
While 1 % may seem【B6】______, it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says,"Most people do not even【B7】______their fourth cousins but somehow manage to select as friends the people who【B8】______our kin."
The study【B9】______found that the genes for smell were something shared in friends but not genes for immunity. Why this similarity exists in smell genes is difficult to explain, for now. 【B10】______, as the team suggests,it draws us to similar environments but there is more【B11】______it. There could be many mechanisms working together that【B12】______us in choosing genetically similar friends【B13】______"functional kinship" of being friends with【B14】______!
One of the remarkable findings of the study was that the similar genes seem to be evolving 【B15】______than other genes. Studying this could help【B16】______why human evolution picked pace in the last 30,000 years, with social environment being a major【B17】______factor.
The findings do not simply explain people’s【B18】______to befriend those of similar【B19】______backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to【B20】______that all subjects, friends and strangers, were taken from the same population.
【B9】
选项
A、again
B、also
C、instead
D、thus
答案
B
解析
本题考查副词用法。Again表示“又,此外;再一次”。一般用于表示几个主语共同一个谓宾,或一个主谓多个宾语;also表示“也;而且”,一般是指动作(谓语)重复、反复进行;instead表示“代替;反而”,表转折;thus表示“因此;从而”,表因果。显然,此处欲表达的是“研究还发现……”。
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0
考研英语一
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