【资料】2015年考研英语(一)真题完整版
2015年考研英语(一)真题完整版SectionI Use of English
Directions: Read thefollowing text. Choose the best word(s) for each numbered blank and mark A, B,C or D on ANSWER SHEET. (10 points) Though notbiologically related, friends are as “related” as fourth cousins, sharing about1% of genes. That is _(1)_a study, published from the University of Californiaand Yale University in the Proceedings of the National Academy of Sciences,has__(2)_. The study is agenome-wide analysis conducted _(3)__1,932 unique subjects which __(4)__pairsof unrelated friends and unrelated strangers. The same people were used inboth_(5)_. While 1% mayseem_(6)_,it is not so to a geneticist. As James Fowler, professor of medicalgenetics at UC San Diego, says, “Most people do not even _(7)_their fourthcousins but somehow manage to select as friends the people who_(8)_our kin.” Thestudy_(9)_found that the genes for smell were something shared in friends butnot genes for immunity .Why this similarity exists in smell genes is difficultto explain, for now,_(10)_,as the team suggests, it draws us to similarenvironments but there is more_(11)_it. There could be many mechanisms workingtogether that _(12)_us in choosing genetically similar friends_(13)_”functionalKinship” of being friends with_(14)_! One of theremarkable findings of the study was the similar genes seem to beevolution_(15)_than other genes Studying this could help_(16)_why humanevolution picked pace in the last 30,000 years, with social environment being amajor_(17)_factor. The findings donot simply explain people’s_(18)_to befriend those of similar_(19)_backgrounds,say the researchers. Though all the subjects were drawn from a population ofEuropean extraction, care was taken to_(20)_that all subjects, friends andstrangers, were taken from the same population.
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