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Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
admin
2019-05-25
64
问题
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______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 corroborate 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.
【B13】
选项
A、according to
B、rather than
C、regardless of
D、along with
答案
B
解析
考查短语辨析及逻辑关系。空前说选择基因相似的朋友,空后说具有“实用亲密关系”的朋友,可知前后为对立关系,并且根据文章主题,可知肯定前者而否定后者,B.rather than意为“而不是”,符合题意。according to“根据”没有体现出对立及取舍关系;regardless of“不管”表让步关系,干扰性较强,但文章更强调取前舍后,因此排除;along with“伴随”表顺接,故排除。
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0
考研英语一
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