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1、【文字完整版】2015考研英语一真题Directions:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET.(10points)Thoughnotbiologicallyrelated,friendsareas“related”asfourthcousins,sharingabout1%ofgenes.Thatis_(1)_astudy,publishedfromtheUniversityofCaliforniaandYaleUniversityinthePr
2、oceedingsoftheNationalAcademyofSciences,has__(2)_.Thestudyisagenome-wideanalysisconducted_(3)__1,932uniquesubjectswhich__(4)__pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth_(5)_.While1%mayseem_(6)_,itisnotsotoageneticist.AsJamesFowler,professorofmedicalgeneticsatUCSanDie
3、go,says,“Mostpeopledonoteven_(7)_theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho_(8)_ourkin.”Thestudy_(9)_foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityexistsinsmellgenesisdifficulttoexplain,fornow,_(10)_,astheteamsuggests,itdrawsusto
4、similarenvironmentsbutthereismore_(11)_it.Therecouldbemanymechanismsworkingtogetherthat_(12)_usinchoosinggeneticallysimilarfriends_(13)_”functionalKinship”ofbeingfriendswith_(14)_!Oneoftheremarkablefindingsofthestudywasthesimilargenesseemtobeevolution_(15)_thanothergenesStudyingthiscouldhelp_(16)
5、_whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor_(17)_factor.Thefindingsdonotsimplyexplainpeople’s_(18)_tobefriendthoseofsimilar_(19)_backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento_(20)_thatallsubjects
6、,friendsandstrangers,weretakenfromthesamepopulation.1.[A]when[B]why[C]how[D]what2.[A]defended[B]concluded[C]withdrawn[D]advised3.[A]for[B]with[C]on[D]by4.[A]compared[B]sought[C]separated[D]connected5.[A]tests[B]objects[C]samples[D]examples6.[A]insignificant[B]unexpected[C]unbelievable[D]incredibl
7、e7.[A]visit[B]miss[C]seek[D]know8.[A]resemble[B]influence[C]favor[D]surpass9.[A]again[B]also[C]instead[D]thus10.[A]Meanwhile[B]Furthermore[C]Likewise[D]Perhaps11.[A]about[B]to[C]from[D]like12.[A]drive[B]observe[C]confu
