绝密★启用前英语（一）（科目代码：201）☆考生注意事项☆1.答题前，考生须在试题册指定位置上填写考生编号和考生姓名；在答题卡指定位置上填写报考单位、考生姓名和考生编号，并涂写考生编号信息点。2.考生须把试题册上的“试卷条形码”粘贴条取下，粘贴在答题卡的“试卷条形码粘贴位置”框中。不按规定粘贴条形码而影响评卷结果的，责任由考生自负。3.选择题的答案必须涂写在答题卡相应题号的选项上，非选择题的答案必须书写在答题卡指定位置的边框区域内。超出答题区域书写的答案无效；在草稿纸、试题册上答题无效。4.填（书）写部分必须使用黑色字迹签字笔书写，字迹工整、笔迹清楚；涂写部分必须使用2B铅笔填涂。5.考试结束，将答题卡和试题册按规定交回。（以下信息考生必须认真填写）考生编号考生姓名2015年全国硕士研究生招生考试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,saythere...
