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Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【C1】______a study
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【C1】______a study
admin
2019-07-10
45
问题
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【C1】______a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has【C2】______.
The study is a genome-wide analysis conducted【C3】______1,932 unique subjects which【C4】______pairs of unrelated friends and unrelated strangers. The same people were used in both【C5】______.
While 1% may seem【C6】______, it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says, "Most people do not even【C7】______their fourth cousins but somehow manage to select as friends the people who【C8】______our kin."
The study【C9】______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.【C10】______, as the team suggests, it draws us to similar environments but there is more【C11】______it. There could be many mechanisms working together that【C12】______us in choosing genetically similar friends【C13】______"functional kinship" of being friends with【C14】______!
One of the remarkable findings of the study was that the similar genes seem to be evolving【C15】______than other genes. Studying this could help【C16】______why human evolution picked pace in the last 30,000 years, with social environment being a major【C17】______factor.
The findings do not simply corroborate people’ s【C18】______to befriend those of similar【C19】______backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to【C20】______that all subjects, friends and strangers, were taken from the same population.
【C19】
选项
A、political
B、religious
C、ethnic
D、economic
答案
C
解析
考查形容词辨析。结合文意,人们普遍希望和有相似基因背景的人交朋友。ethnic“种族的,民族的”是上文中多次重复出现的genes以及下文的the same population的同义复现。因此正确答案为C项。political“政治的”,religious“宗教的”,economic“经济的”,均不符合文意。
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0
考研英语一
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