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1、Unit4 SharingⅠ.阅读A(第14期)Doyouhavegoodfriends?Doyousometimesfeelsoclosetothemthattheyarelikefamilytoyou?Itturnsoutthatthisisn’tjustanexpression.AstudybyYaleUniversityandtheUniversityofCalifornia,SanDiego,hasfoundthatyouandyourfriendshavemoregenesincommonthanstrang
2、ersdo,theGuardianreported.Researcherslookedatthegenesof1,932peopleandcomparedtheminpairsofunrelatedfriendsandstrangers.Theyfoundthatfriendshave1percentofgenesthatmatch.“Onepercentmaynotsoundlikemuchtothelayperson(外行),buttogeneticists(遗传学家)itisasignificantnumber,”
3、ProfessorNicholasChristakisofYaleUniversitytoldDiscoveryNews.Infact,thisisthesameamountofgenesyousharewithyourfourthcousins,thosewhohavethesamegreat-great-greatgrandparentsasyou.Soisitacoincidencethatyoubecomefriendswithpeoplewhoshareyourgenes?Notatall.Infact,iti
4、sevolutionthatbringsyoutogether.Peoplewhosharecertaingenesalsoshareskillsandhavesimilarlikesanddislikes,researcherssaid.Inancienttimes,itwascriticalthatpeoplewhowerealikestayedtogether.Forexample,peoplewhohadasimilarsusceptibility(易感性)tothecoldweremorelikelytohel
5、peachotherbuildafire,givingthemabetterchancetosurvive.Researchersalsofoundthatamongallthegenesstudied,thoseaffectingsenseofsmellwerethemostsimilarinfriends.Thisisprobablybecausepeoplewhosmellthingsinthesamewayaremoreeasilydrawntosimilarenvironments.Forexample,peo
6、plewholikethesmellofcoffeemayhangoutatcafesmoreoftenandarethereforemorelikelytomeetandbecomefriendswith8eachother.Basedontheirfindings,theteamhasdevelopedaninterestingtestcalledthe“friendshipscore”.Itcalculateshowbigthechancesarethattwopeoplewillbefriendsbystudyi
7、ngtheirgenes.So,hereisaquestionforyou:wouldyouliketotakethistestandknowinadvancewhoyourfriendsaregoingtobe,orwouldyoustillprefertofigureitoutbyyourselfandlettimebethejudge?1.Whatistheauthor’smainpurposeinwritingthearticle?A.Toexplainwhyfriendsshareskillsandintere
8、sts.B.Toreportonrecentfindingsaboutmakingfriends.C.Toanalyzewhatinfluencesthewaypeoplemakefriends.D.Toexplainaninterestingtestcalledthe“friendshipscore”.2.Acco
