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1、实用文档2015研究生入学考试英语一真题答案解析Section1UseofEnglish Directions:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmark[A],[B],[C]or[D]onANSWERSHEET1.(10points) Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousins,sharingabout1%ofgenes
2、.Thatis1astudypublishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has2. Thestudyisagenome-wideanalysisconducted31932uniquesubjectswhich4pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedin
3、both5. While1%mayseem6,itisnotsotoageneticist.Asco-authorofthestudyJamesFowler,professorofmedicalgeneticsatUCSanDiegosays,"Mostpeopledonoteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho8ourkin." Theteamalsodevelopeda"friendshipscore
4、"whichcanpredictwhowillbeyourfriendbasedontheirgenes. Thestudy9foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityinolfactorygenesisdifficulttoexplain,fornow.10,astheteamsuggests,itdrawsustosimilarenvironmentsbut
5、thereismore11it.Therecouldbemanymechanismsworkingintandemthat12usinchoosinggeneticallysimilarfriends13than"functionalkinship"ofbeingfriendswith14! Oneoftheremarkablefindingsofthestudywasthatthesimilargenesseemtobeevolving15thanothergenes.Studyingthiscoul
6、dhelp16whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor17factor.文案大全实用文档 Thefindingsdonotsimplycorroboratepeople’s18tobefriendthoseofsimilar19backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuro
7、peanextraction,carewastakento20thatallsubjects,friendsandstrangersweretakenfromthesamepopulation.Theteamalsocontrolledthedatatocheckancestryofsubjects. 1AwhatBwhyChowDwhen 2AdefendedBconcludedCwithdrawnDadvised 3AforBwithCbyDon 4AseparatedBsoughtCcomp
8、aredDconnected 5AtestsBobjectsCsamplesDexamples 6AinsignificantBunexpectedCunreliableDincredible 7AvisitBmissCknowDseek 8AsurpassBinfluenceCfavorDresemble 9AagainBalsoCinsteadDthus 10AMeanwhileBFurthermoreCLik
