2015年全国硕士研究生招生考试考研资料【公众号：考研题库】永久免费分享！Directions:SectionIUseofEnglishReadthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET.(lOpoints)Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousms,sharingabout1%ofgenes.Thatis1astudy,publishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has2Thestudyisagenome-wideanalysisconducted31,932uniquesubjectswhich4pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth_5_While1%mayseem6,itisnotsotoageneticist.AsJamesFowler,professorofmedicalgeneticsatUCSanDiego,says,"Mostpeopledonoteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho8ourkin."Thestudy_9_foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityexistsinsmellgenesisdifficulttoexplain,fornow.10astheteamsuggests,itdrawsustosimilarenvironmentsbutthere1smore11it.Therecouldbemanymechanismsworkingtogetherthat12usinchoosinggeneticallysimilarfriends_D"functionalkinship"ofbeingfriendswith14Oneoftheremarkablefindingsofthestudywasthatthesimilargenesseemtobeevolving15thanothergenes.Studyingthiscouldhelp16whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor17factor.Thefindingsdonotsimplyexplainpeople's-�1�8�tobefriendthoseofsimilar19backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento20thatallsubjects,friendsandstrangers,weretakenfromthesamepopulation.-1-考研资料【公众号：考研题库】永久免费分享！1.[A]when2.[A]defended3.[A]for4.[A]compared5.[A]tests6.[A]insignificant7.[A]visit8.[A]resemble9.[A]again10.[A]Meanwhile11.[A]about12.[A]drive13.[A]accordingto14.[A]chances15.[A]later16.[A]forecast17.[A]unpredictable18.[A]endeavor19.[A]political20.[A]seePartADirections:[B]why[C]how[D]what[B]concluded[C]withdrawn[D]advised[B]with[C]on[D]by[B]sought[C]separated[D]connected[B]objects[C]samples[D]examples[B]unexpect...
