全国硕士研究生入学统一考试英语一试题Section1UseofEnglishDirections:Readthefollowingtext
Choosethebestword(s)foreachnumberedblankandmark[A],[B],[C]or[D]onANSWERSHEET1
(10points)Thoughnotbiologicallyrelated,friendsareasrelatedasfourthcousins,sharingabout1%ofgenes
Thatis1astudypublishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has2
Thestudyisagenome-wideanalysisconducted31932uniquesubjectswhich4pairsofunrelatedfriendsandunrelatedstrangers
Thesamepeoplewereusedinboth5
While1%mayseem6,itisnotsotoageneticist
AsJamesFowler,professorofmedicalgeneticsatUCSanDiego,says,Mostpeopledonoteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho8ourkin
Thestudy9foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity
Whythissimilarityinolfact