版权所有翻印必究1中公考研学员专用资料报名专线：400-6300-9662015年全国硕士研究生招生考试英语（一）试题SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET.(10points)Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousins,sharingabout1%ofgenes.Thatis1astudypublishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has2.Thestudyisagenome-wideanalysisconducted31932uniquesubjectswhich4pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth5.While1%mayseem6,itisnotsotoageneticist.Asco-authorofthestudyJamesFowler,professorofmedicalgeneticsatUCSanDiegosays,"Mostpeopledonoteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho8ourkin."Theteamalsodevelopeda"friendshipscore"whichcanpredictwhowillbeyourfriendbasedontheirgenes.Thestudy9foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityinsmellgenesisdifficulttoexplain,fornow.10,astheteamsuggests,itdrawsustosimilarenvironmentsbutthereismore11it.Therecouldbemanymechanismsworkingintandemthat12usinchoosinggeneticallysimilarfriends13than"functionalkinship"ofbeingfriendswith14!Oneoftheremarkablefindingsofthestudywasthatthesimilargenesseemtobeevolving15thanothergenes.Studyingthiscouldhelp16whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor17factor.Thefindingsdonotsimplycorroboratepeople's18tobefriendthoseofsimilar19backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento20thatallsubjects,friendsandstrangersweretakenfromthesamepopulation.Theteamalsocontrolledthedatatocheckancestryofsubjects.1.[A]what[B]how[C]why[D]when2.[A]defended[B]concluded[C]withdrawn[D]advised3.[A]for[B]with[C]by[D]on4.[A]separated[B]sought[C]compared[D]connected5.[A]tests[B]objects[C]samples[D]examples6.[A]insignificant[B]unexpected[C]unreliable[D]incredible7.[A]visit[B]miss[C]know[D]s...
