考研英语一真题.pdf
2015年入学考试英语一试题
SectionIUseofEnglish
Directions:
Readthefollowingtext.Choosethebestword(s)foreachnumberedblank
andmarkA,B,CorDonANSWERSHEET1.(10points)
Wehavemoregenesincommonwithpeoplewepicktobeourfriendsthanwith
strangers.
Thoughnotbiologicallyrelated,friendsareasrelatedasfourthcousins,
sharingabout1%ofgenes.Thatis1astudypublishedfromtheUniversityof
CaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyof
Sciences,has2.
Thestudyisagenome-wideanalysisconducted31932uniquesubjects
which4pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereused
inboth5.
While1%mayseem6,itisnotsotoageneticist.Asco-authorofthestudy
JamesFowler,professorofmedicalgeneticsatUCSanDiegosays,Mostpeopledo
noteven7theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeople
who8ourkin.
Theteam9developedafriendshipscorewhichcanpredictwhowillbeyour
friendbasedontheirgenes.
Thestudyalsofoundthatthegenesforsmellweresomethingsharedinfriends
butnotgenesforimmunity.Whythissimilarityinolfactorygenesisdifficultto
explain,fornow.10,astheteamsuggests,itdrawsus11similarenvironmentsbut
thereismoretoit.Therecouldbemanymechanismsworkingintandemthat12usin
choosinggeneticallysimilarfriends13functionalkinshipofbeingfriendswith14!
Oneoftheremarkablefindingsofthestudywasthatthesimilargenesseemtobe
evolving15thanothergenes.Studyingthiscouldhelp16whyhumanevolution
pickedpaceinthelast30,000years,