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1、单元检测卷（十九）必修4Unit4:::：I•阅读理解Theideaforascienceexperimentcancomefromanunusualplace.AfterwatchingaYouTubevideoofadancingbirdnamedSnowball,ascientistinCaliforniadecidedtostudytheabilityofanimalstokeepthebeat.Birdlovershavelongclaimedthattheirpetshaverhythm,andtherearemanyvideosofdancingbirds
2、online.Untilnow,scientistshavesuspectedthathumansaretheonlyanimalsthatcanaccuratelykeeprhythmwithmusic.ThankstoSnowbalbthatscientificopinionischanging.Snowballisacockatoo,akindofparrot>andhisfavoritesongisEverybodybytheBackstreetBoys・Whenhehearsthesong,hemoveshisfeetandswayshisbodywithth
3、etempo,orpaceofthemusic,asthoughheistheonlybirdmemberoftheboyband・AniruddhPatelisaneuroscientist,orascientistwhostudieshowthebrainandthenervoussystemcontributetolearning,seeingandothermentalabilities・HeworksattheNeurosciencesInstituteinSanDiego.AfterseeingSnowbalfsdancemovesonline,Patelv
4、isitedthecockatooatthebirdrescuefacilityhe'scalledhomefortwoyears.ThescientistplayedEverybodyforSnowballandalsoplayedversionsofthesongthatwerespeduporsloweddown.Sometimes,Snowballdancedtoofastortooslowly.Often,whentherewasachangeintempo,Snowballadjustedhisdancingtomatchtherhythm.Inothere
5、xperiments,scientistshaveobservedthesameabilitiesinpreschoolchildren.Patelisn'ttheonlyscientistwhohasstudiedSnowbalTsmoves.AdenaSchachner,whostudiespsychologyatHarvardUniversity,alsowantedtoknowmoreaboutthedancingbird.SchachnefsteamplayeddifferentmusicalpiecesforSnowballandaparrotnamedAl
6、ex,aswellaseighthumanvolunteers.Thescientistsobservedthatthebirdsandthehumanskepttimetothemusicwithaboutthesameaccuracy・Schachnerandherteamdidn'tstopwiththebirds.SheandhercolleagueswatchedthousandsofYouTubevideosofdifferentanimalsmovingtomusic.Notalltheanimalscoulddance,however.Fromwatch
7、ingthevideos,thescientistsobservedthatonlyanimalsthatimitatesounds,including14parrotspeciesandAsianelephants,accuratelymovedintimetomusic.语篇导读研究表明，很多动物的音乐节奏感并不亚于人类，而在此之前，人们一直认为只有人类才有乐感。1•Theunderlinedwords"thatscientificopinion"inthethirdparagraphrefertothetheorythatA.hum
