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1、Unit2ThisstoryisbasednearthePacificOceanandtakesplaceneartheMexicanportcitiesofSantaRosaliaandGuaymasontheGulfofCalifornia.Humboldtsquids,or"RedDevils,aresomeoftheworld'slargestanimalswithoutabackbone.ThesesometimesdangerouscreaturesliveinthedeepwatersofthePacificOcean.Aresearchera
2、ndaprofessionaldiverhavecometotheGulfofCaliforniatolearnmoreaboutthem.WilltheyfindanyRedDevils?Willtheybeabletoobservethemsafely?I.GiantSquid.Readtheparagraph.Thenwritethecorrectunderlinedwordnexttoeachdefinition.TheHumboldtsquidisoneofthelargestinvertebratesintheworldandcanreachmo
3、rethan182centimetersinlengthandweighalmost30kilograms.Thisdangerouspredatoriscarnivorousandfeedsmostlyonsmallfish.Ithasverylongtentaclescoveredwithsharpteeththatitusestoattack.Whenthreatened,theseseacreaturessquirtstreamsofdarkinkinordertoblindtheirenemiesandprotectthemselves.While
4、theirnormalpreyislimitedtosmallseacreatures,Humboldtsquidhavebeenknowntoeatthebodiesofdeadfishermenatseaandtoattackoceandivers.1.ananimalthatlivesbykillingandeatingothers:______________2.acoloredliquidusuallyusedinpens:______________3.meat-eating:______________4.animalswithnobackbo
5、ne:______________5.animalskilledforfoodbyotheranimals:______________6.sendastreamofliquidoutinathinline:______________7.long,thin,flexiblearm-likebodypartsfoundonsomeoceancreatures:______________1.predator2.ink3.carnivorous4.invertebrates5.prey6.squirt7.tentaclesII.Deep-SeaDiving.R
6、eadtheparagraph.Thenmatcheachwordorphrasewiththecorrectdefinition.NeurobiologistDr.BobGillyisgoingtotheGulfofCaliforniainMexicotostudythebehavioroftheHumboldtsquid.HiscolleagueBobCranston,anexperienceddeep-seadiverandintrepidcameraman,isjoininghimonthetrip.Becausegiantsquidliveatve
7、rygreatdepths,Cranstonhasdevelopedaspecialdivingdevicethatusesafiltertoremovecarbondioxide(CO2)fromhisairsupply.Thespecialscubaequipmentisdesignedtohelphimgodeeperandstaydownlonger.ThedevicemayalsohelpCranstonavoidthedangerousandsometimesdeadlyconditionofdecompressionsickness,which
8、resultsfromrisingtooquickl
