视听阅读第2单元答案.doc

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1、Unit2Readingcomprehension1-7DBACDCC8.verysensitivetoredlight9.keepingawaypossiblepredators10.atfullspeedHomeListeningI.1.Onlyrecently2.Someresearchersbelievethatthejumbosquidmovefurthernorthbecausethenorthernoceansarewarming,whileothersthinkthatdecliningnumbersofpreda

2、torshaveallowedthemtoexpandtheirterritories.3.Itistheabilityofthejumbosquidtoradicallychangeitscolorfromreddish-purpletopurewhite.4.Becauseredisnoteasilyvisibletofishandothercreaturesinthedarknessoftheoceandepths.5.Itsenormoussize.6.Theytookittoaresearchcenter.II.(1)1

3、925(2)two(3)2004(4)six(5)secondIII.1.Squidareamongtheleastunderstoodofallinvertebrates.2.Theyarealsonowabletocategorizemanyofthembygenus,amoregeneralcategoryofanimaltypes,aswellasbyspecies.3.Recently,somehaveappearedasfarnorthasAlaska,raisingquestionsabouttheeffectsof

4、globalwarmingonthespecies.4.Theredcolorisusefultothesquidwhenhuntingforfoodsinceredisnoteasilyvisibletofishinthedarknessoftheoceandepths.5.Theword“colossal”wasusedtodistinguishitfromitssmallerrelative,thegiantsquid.AudioscriptTheJumbovs.ThecolossalSquidSquidareamongth

5、eleastunderstoodofallinvertebrates.Forcenturiessailorshavereportedsquid-likemonsterssolargethattheywouldbecapableofdestroyingentireships.Onlyrecently,however,havebiologistsbeenabletodeterminethetruthaboutthesesstrangecreatures.Theyarealsonowabletocategorizemanyofthemb

6、ygenus,amoregeneralcategoryofanimaltypes,aswellasbyspecies.Twosuchenormoussquidarethejumbosquidandthecolossalsquid.TheJumboSquidThejumbosquid,alsoknownastheHumboldtsquid,hasbeensightedinthePacificOceanfromthetipofSouthAmericatothecoastofCalifornia.Recently,somehaveapp

7、earedasfarnorthasAlaska,raisingquestionsabouttheeffectsofglobalwarmingonthespecies.Someresearcherssuggestthattheyaremovingfurthernorthbecausethenorthernoceansarewarming,whileothersbelieverthatdecliningnumbersofpredatorshaveallowedthejumbosquidtoexpendtheirterritories.

8、Oneunusualfeatureofthejumbosquidisitsabilitytoradicallychangeitscolorfromreddish–purpletopurewhite.Theredcolorisusefultothes