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楼主  发表于: 2017-02-14   
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考博英语真题

2015考研英语真题完整版(英语一) ':3[?d1Es  
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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)_. N6v?Qzvi  
  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)_. ~> N63I6  
  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.” J.'%=q(Sb  
  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)_! [:(/cKo  
  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. /!MVpi'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. j ijwHL  
  1. [A] when [B] why [C] how [D] what <&#MX  
  2. [A] defended [B] concluded [C] withdrawn [D] advised vK[%c A"  
  3. [A] for [B] with [C] on [D] by z:$ibk4#h  
  4. [A] compared [B] sought [C] separated [D] connected M>[ A  
  5. [A] tests [B] objects [C]samples [D] examples W+/_0GgQ3  
  6. [A] insignificant [B] unexpected [C]unbelievable [D] incredible e#,(a  
  7. [A] visit [B] miss [C] seek [D] know .6T0d 4,1  
  8. [A] resemble [B] influence [C] favor [D] surpass KGcjZx04!  
  9. [A] again [B] also [C] instead [D] thus %1:caa@_p  
  10. [A] Meanwhile [B] Furthermore [C] Likewise [D] Perhaps #\ `kg#&  
  11. [A] about [B] to [C]from [D]like /`7+Gy<  
  12. [A] drive [B] observe [C] confuse [D]limit o<%0|n_O&  
  13. [A] according to [B] rather than [C] regardless of [D] along with G<Eb~]. 1'  
  14. [A] chances [B]responses [C]missions [D]benefits w]yVNB  
  15. [A] later [B]slower [C] faster [D] earlier ZZ!">AN`^  
  16. [A]forecast [B]remember [C]understand [D]express R"9w VM;*c  
  17. [A] unpredictable [B]contributory [C] controllable [D] disruptive vXRY/Zzj1  
  18. [A] endeavor [B]decision [C]arrangement [D] tendency IhBc/.&RL  
  19. [A] political [B] religious [C] ethnic [D] economic U: Wet,  
  20. [A] see [B] show [C] prove [D] tell AB`.K{h  
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