考研英语一历年真题及答案

考研英语一历年真题及答案

【篇一：2015年考研英语一真题及答案详细解析】

ass=txt2015年全国硕士研究生入学统一考试英语（一）试题

及答案详细解析

sectioniuseofenglish:

directions:readthefollowingtext.choosethebestword(s)foreach

numberedblankandmarka,b,cordontheanswersheet.(10points)

thoughnotbiologicallyrelated,friendsareas―related‖asfourth

cousins,sharingabout1%ofgenes.thatis_(1)_astudy,publishedfromthe

universityofcaliforniaandyaleuniversityintheproceedingsofthe

nationalacademyofsciences,has__(2)_.

thestudyisagenome-wideanalysisconducted_(3)__1,932unique

subjectswhich__(4)__pairsofuelatedfriendsanduelatedstrangers.the

samepeoplewereusedinboth_(5)_.

while1%mayseem_(6)_,itisnotsotoageneticist.asjamesfowler,

professorofmedicalgeneticsatucsandiego,says,―mostpeopledonot

even_(7)_theirfourthcousinsbutsomehowmanagetoselectasfriendsthe

peoplewho_(8)_ourkin.‖

thestudy_(9)_foundthatthegenesforsmellweresomethingsharedin

friendsbutnotgenesforimmunity.whythissimilarityexistsinsmellgenes

isdifficulttoexplain,fornow,_(10)_,astheteamsuggests,itdrawsusto

similarenvironmentsbutthereismore_(11)_it.therecouldbemany

mechanismsworkingtogetherthat_(12)_usinchoosinggeneticallysimilar

friends_(13)_‖functionalkinship‖ofbeingfriendswith_(14)_!

oneoftheremarkablefindingsofthestudywasthesimilargenes

seemtobeevolution_(15)_thanothergenesstudyingthiscould

help_(16)_whyhumanevolutionpickedpaceinthelast30,000years,with

socialenvironmentbeingamajor_(17)_factor.

thefindingsdonotsimplyexplainpeople‘s_(18)_tobefriendthoseof

similar_(19)_backgrounds,saytheresearchers.thoughallthesubjects

weredrawnfromapopulationofeuropeanextraction,carewastaken

to_(20)_thatallsubjects,friendsandstrangers,weretakenfromthe

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