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14Unit3Scienceandnature课时练12篇阅读+1篇完形eq\a\vs4\al(Ⅰ)阅读理解A(2020·宣城诊断)InthestoryofTheCrowandthePitcherfromAesop’sFablesathirstycrow(乌鸦)dropsstonesintoanarrowjartoraisethelowlevelofwaterinsidesohecantakeadrink.Nowscientistshaveevidencetobackupthatstory.Crowsactuallydounderstandhowtomakewaterdisplacement(排水量)worktotheiradvantageexperimentsshow.Theresultssuggestthatthebirdsareatleastinsomeaspectsassmartasfirst­graders.ResearchersledbySarahJelbertattheUniversityofCambridgepresentedsixcrowswithtubescontainingwater.Insidethetubesawormorapieceofmeatonapieceofwoodwasfloatingjustoutofreachofthecrows.Infrontofthetubestheresearchersarrangedseveralrubbererasersthatwouldsinkandsomeplasticobjectsthatwouldfloat.Thecrowsfoundoutthattheycoulddroptheerasersintothetubesinordertoraisethewaterlevelandgettheirsnack.Howeverthe_birds_handled_awkwardlyinexperimentsinwhichtheycouldchoosetodropobjectsineitherawidetubeoranarrowonetogetasnacktheresearcherssaid.Droppingobjectsintoanarrowtubewouldliftthewaterlevelbyagreateramountandputthetreatwithinreachafterjusttwodrops;whileittookaroundsevendropstoraisethesnacktothesamelevelinthewidetube.Thecrowsobviouslydidn’trealizethisandmostofthemwentforthewidetubefirst.Previousstudiesshowedthatchimpsandhumanchildrencansolvesimilartasks.Ina2011studychimpsandkidsfoundoutthattheycouldputwaterintoatubetoreachapeanutthatwasfloatinginasmallamountofwateratthebottom.【解题导语】本文主要介绍了科学家通过实验对乌鸦智商进行的研究。1.HowdidthecrowsgetthesnackinSarah’sexperiment?A.Bybreakingthetube.B.Bydroppinginerasers.C.Bystandingonthewood.D.Byremovingthewood.B解析:细节理解题。根据第三段最后一句“Thecrowsfoundoutthattheycoulddroptheerasersintothetubesinordertoraisethewaterlevelandge