视听阅读第2单元答案

Unit2Readingcomprehension1-7DBACDCC8.verysensitivetoredlight9.keepingawaypossiblepredators10.atfullspeedHomeListeningI.1.Onlyrecently2.Someresearchersbelievethatthejumbosquidmovefurthernorthbecausethenorthernoceansarewarming,whileothersthinkthatdecliningnumbersofpredatorshaveallowedthemtoexpandtheirterritories.3.Itistheabilityofthejumbosquidtoradicallychangeitscolorfromreddish-purpletopurewhite.4.Becauseredisnoteasilyvisibletofishandothercreaturesinthedarknessoftheoceandepths.5.Itsenormoussize.6.Theytookittoaresearchcenter.II.(1)1925(2)two(3)2004(4)six(5)secondIII.1.Squidareamongtheleastunderstoodofallinvertebrates.2.Theyarealsonowabletocategorizemanyofthembygenus,amoregeneralcategoryofanimaltypes,aswellasbyspecies.3.Recently,somehaveappearedasfarnorthasAlaska,raisingquestionsabouttheeffectsofglobalwarmingonthespecies.4.Theredcolorisusefultothesquidwhenhuntingforfoodsinceredisnoteasilyvisibletofishinthedarknessoftheoceandepths.5.Theword“colossal”wasusedtodistinguishitfromitssmallerrelative,thegiantsquid.AudioscriptTheJumbovs.ThecolossalSquidSquidareamongtheleastunderstoodofallinvertebrates.Forcenturiessailorshavereportedsquid-likemonsterssolargethattheywouldbecapableofdestroyingentireships.Onlyrecently,however,havebiologistsbeenabletodeterminethetruthaboutthesesstrangecreatures.Theyarealsonowabletocategorizemanyofthembygenus,amoregeneralcategoryofanimaltypes,aswellasbyspecies.Twosuchenormoussquidarethejumbosquidandthecolossalsquid.TheJumboSquidThejumbosquid,alsoknownastheHumboldtsquid,hasbeensightedinthePacificOceanfromthetipofSouthAmericatothecoastofCalifornia.Recently,somehaveappearedasfarnorthasAlaska,raisingquestionsabouttheeffectsofglobalwarmingonthespecies.Someresearcherssuggestthattheyaremovingfurthernorthbecausethenorthernoceansarewarming,whileothersbelieverthatdecliningnumbersofpredatorshaveallowedthejumbosquidtoexpendtheirterritories.Oneunusualfeatureofthejumbosquidisitsabilitytoradicallychangeitscolorfromreddish–purpletopurewhite.Theredcolorisusefultothesquidwhenhuntingforfoodsinceredisnoteasilyvisibletofishandothercreaturesinthedarknessoftheoceandepths.ThisspeciesisalsoknowntobequiteaggressiveandMexicandiverswhohaveencounteredthemunderwaterhavegiventhemthenamediablosrojos,or“reddevils”.TheColossalSquidFormanyyears,littlewasknownaboutthespeciesofsquidcalledthe“colossalsquid.”Itwasfirstidentifiedin1925whenscientistsdiscoveredtwohugesquidtentaclesinawhale’sstomach.Theterm“colossalsquid”wascreatedin2004whenagroupoffishermenoffthecoastofNewZealandaccidentlycaughtasix-meter-longsquid.Theytooktheirfindtoaresearchcenterwhereexpertsconfirmedthatitwasindeedanexampleofthelargestspeciesofsquidknowntoscience.Theword“colossal”wasusedtodistinguishitfromitssmallerrelative,thegiantsquid.Althoughscientistshadexaminedsimilarsquidinthepast,thoseanimalswerefounddeadandtheirbodieswerenotcompleteoringoodcondition.TheresearchersinNewZealandwereextremelyexcitedbecausethiswasonlythesecondtimeinhistorythatscientistswereprovidedwiththeopportunitytodoathoroughexaminationofanundamagedexampleofacolossalsquid.