2019版高考英语一轮复习 Unit 1 Great Scientists达标巩固练（含解析）新人教版必修5

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1、Unit1GreatScientists一、阅读理解。Animalsusemanytrickstohidefrompredators(捕食性动物)．Whiledifferent，theyareallvisualanimals.Nowscientistshaveuncoveredafishspeciesthatusesbothvisualandchemicaldisguise(伪装)．RohanBrooker,oneoftheresearcherswhomadethediscoverysaidthathefirstthoughtoftheideaafterreadi

2、ngaboutaspecieswhichtakesonthesmelloftheplantthatiteats.Thus，itspredators，antswalkrightoverit.SinceHarlequinFilefisharepickyeatersthatfeedtotallyofftheAcropora—abeautifulspeciesofblue/purplecoral，Brookertheorizedthattheytoomaybeusingasimilartricktofooltheirpredators.Totesthistheory，Br

3、ooker'steamacquiredsomefilefishfromtheGreatBarrierReefanddividedthemintotwogroups.Forthenextfourweeks，onegroupfedontheirnormaldietoftheAcroporacoral，whiletheotherfedonthePocilloporacoral.Inordertotestiftherewasanydifferenceinthewaytheysmelled，theresearchersdidanotherexperiment.Theyfou

4、ndthesmellsfromthetwogroupsweredifferent.Buttherewasstillaquestionofwhetherthesmellwasstrongenoughtoprotectthefishfromtheirnaturalpredators.Totestthat，Brooker'steamaddedapredatoryspeciesofcod(鳕鱼)tothemix.Sureenough，thecodthatwereplacedinthetankcontainingthefishfedonthePocilloporacoral

5、wereimmediatelyabletosensethem.Incontrast，thecodinthetankwherethefishhadbeenfedontheirnaturaldiet—theAcroporacoral，appearedoblivioustotheirexistenceandinsteadspentmuchoftheirtimeinsidethetank'scaves.Thisconfirmedtheteam'ssuspicionthatthefilefishhavefiguredouthowtogiveoffthesmelloftheA

6、croporacoraltoavoidbeingdetectedbypredators.Whilethesmellbaseddisguisehadbeenpreviouslyobservedinsomespeciesoffreshwater，thisstudywasthefirsttoprovethatthefish'sdietwasthesourceofthisdisguise.ThoughthetheoryhasonlybeentestedonHarlequinFilefish，Brookersuspectsthatthiskindofchemicaldisg

7、uiseisfairlymonamongseaanimals.Sureitgivesawholenewmeaningtothesaying—“Youarewhatyoueat！”1．Theunderlinedword“oblivious”inParagraph3maymean“________”．A．ignorantB．sensitiveC．allergicD．cautious2．WhatstatementmayBrookeragreeto?A．Freshwaterfishallknowtheroleofsmell.B．Seaanimalsusesmelltoch

8、eatth