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1、Unit4BodylanguageI•阅读理解Theideaforascienceexperimentcancomefromanunusualplace.AfterwatchingaYouTubevideoofadancingbirdnamedSnowball,ascientistinCaliforniadecidedtostudytheabilityofanimalstokeepthebeat.Birdlovershavelongclaimedthattheirpetshaverhythm,andtherearemany
2、videosofdancingbirdsonline.Untilnow,scientistshavesuspectedthathumansaretheonlyanimaIsthatcanaccuratelykeeprhythmwithmusic・ThankstoSnowball,thatscientificopinionischanging・Snowballisacockatoo,akindofparrot,andhisfavoritesongis"Everybody”bytheBackstreetBoys.Whenheh
3、earsthesong,hemoveshisfeetandswayshisbodywiththetempo,orpaceofthemusic,asthoughheistheonlybirdmemberoftheboyband・AniruddhPatelisancuroscientist,orascientistwhostudieshowthebrainandthenervoussystemcontributetolearning,seeingandothermentalabilities・HeworksatthetheNe
4、urosciencesTnstituteinSanDiego.AfterseeingSnowball'sdancemovesonline,Patelvisitedthecockatooatthebirdrescuefaci11tyhe'scal1edhomefortwoyears.Thescientistplayed“Everybody"forSnowballandalsoplayedversionsofthesongthatworespeduporsloweddown.Sometimes,Snowba11dancedto
5、ofastortooslowly.Often,whentherewasachangeintempo,Snowballadjustedhisdancingtomatchtherhythm.Tnotherexperiments,scientistshaveobservedthesameabilitiesinpreschoolchildren.Patelisn'ttheonlyscientistwhohasstudiedSnowball"smoves・AdenaSchachner,whostudiespsychologyatHa
6、rvardUniversity,alsowantedtoknowmoreaboutthedancingbird.Schachner"steamplayeddifferentmusicalpiecesforSnowballandaparrotnamedAlex,aswel1aseighthumanvolunteers.Thescientistsobservedthatthebirdsandthehumanskepttimetothemusicwithaboutthesameaccuracy.Schachnerandherte
7、amdidn"tstopwiththebirds.SheandhercolleagueswatchedthousandsofYouTubevideosofdifferentanimaIsmovingtomusic.Notal1theanimalscoulddance,however・Fromwatchingthevideos,thescientistsobservedthatonlyanimalsthat.imitatesounds,including14parrotspeciesandAsianelephants,acc
8、uratelymovedintimetomusic.1・Theunderlinedwords"thatscientificopinion"inthethirdparagraphreferstothetheorythat.A.humansaretheonlyanimaIsthatcanaccurately