考博英语真题

2015考研英语真题完整版（英语一） QZ h|6&yI  
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　　Though not biologically related, friends are as “related” as fourth cousins, sharing about 1% of genes. That is _(1)_a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has__(2)_. 2<YHo{0BLS  
　　The study is a genome-wide analysis conducted _(3)__1,932 unique subjects which __(4)__pairs of unrelated friends and unrelated strangers. The same people were used in both_(5)_. rt t?4  
　　While 1% may seem_(6)_,it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says, “Most people do not even _(7)_their fourth cousins but somehow manage to select as friends the people who_(8)_our kin.” -%"MAIJnX  
　　The study_(9)_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,_(10)_,as the team suggests, it draws us to similar environments but there is more_(11)_it. There could be many mechanisms working together that _(12)_us in choosing genetically similar friends_(13)_”functional Kinship” of being friends with_(14)_! F;`es%8  
　　One of the remarkable findings of the study was the similar genes seem to be evolution_(15)_than other genes Studying this could help_(16)_why human evolution picked pace in the last 30,000 years, with social environment being a major_(17)_factor. IRXpk6|  
　　The findings do not simply explain people’s_(18)_to befriend those of similar_(19)_backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to_(20)_that all subjects, friends and strangers, were taken from the same population. _d)w, ;m#  
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　　5. [A] tests [B] objects [C]samples [D] examples a]$KI$)e  
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　　9. [A] again [B] also [C] instead [D] thus Koahd=  
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　　11. [A] about [B] to [C]from [D]like _U/etlDTO  
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　　14. [A] chances [B]responses [C]missions [D]benefits Mp"] =  
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　　17. [A] unpredictable [B]contributory [C] controllable [D] disruptive 32YE%  
　　18. [A] endeavor [B]decision [C]arrangement [D] tendency 9]7 +fu  
　　19. [A] political [B] religious [C] ethnic [D] economic W>;AMun  
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