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1、2015年全国硕士研究生入学考试英语(课程)一试题SectionIUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET1.(10points)Wehavemoregenesincommonwithpeoplewepicktobeourfriendsthanwithstrangers.Thoughnotbiologicallyrelated,friendsareas"related"asf
2、ourthcousins,sharingabout1%ofgenes.Thatis1astudypublishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has2.Thestudyisagenome-wideanalysisconducted31932uniquesubjectswhich4pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewere
3、usedinboth5.While1%mayseem6,itisnotsotoageneticist.Asco-authorofthestudyJamesFowler,professorofmedicalgeneticsatUCSanDiegosays,"Mostpeopledonoteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho8ourkin."Theteam9developeda"friendshipscore"whichcanpredictwhowillbeyo
4、urfriendbasedontheirgenes.Thestudyalsofoundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityinolfactorygenesisdifficulttoexplain,fornow.10,astheteamsuggests,itdrawsus11similarenvironmentsbutthereismoretoit.Therecouldbemanymechanismsworkingint
5、andemthat12usinchoosinggeneticallysimilarfriends13"functionalkinship"ofbeingfriendswith14!Oneoftheremarkablefindingsofthestudywasthatthesimilargenesseemtobeevolving15thanothergenes.Studyingthiscouldhelp16whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingama
6、jor17factor.Thefindingsdonotsimplycorroboratepeople's18tobefriendthoseofsimilaret19backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento20thatallsubjects,friendsandstrangersweretakenfromthesamepopulation.Theteamalsocontrolled
7、thedatatocheckancestryofsubjects.1.[A]what[B]why[C]how[D]when2.[A]defended[B]concluded[C]withdrawn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
8、]visit[B]miss[C]know[D]seek8.[A]s
