高级英语1lesson3课后练习答案补充练习

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1、Lesson3ShipsintheDesert课后练习答案及补充练习习题全解I.　1)ThewriterwenttotheAralSeatosearchfortheunderlyingcausesoftheenvironmentalcrisis.Whathesawtherewashotdrysand.　2)Itwastheannuallayersoficeinacoresampledugfromtheglacier.　3)Scientistsweremonitoringtheairseveraltimesadaytochart

2、thecourseoftheclimatechange.　4)Becausethepolarcapplaysacrucialroleintheworld'sweathersystem,thethinningofthepolarcapmightcausefloodinmanyplacesoftheworld.　5)TherearemoredifferentspeciesofbirdsineachsquaremileoftheAmazonthanexistinallofNorthAmerica.Thedestructionofth

3、eAmazonrainforestwillmeansilencingthousandsofsongswehaveneverevenheard.　6)Thewritercallsnoctilucentclouds"ghostsinthesky".Asaresultofpollution,thecloudsoccasionallyappearwhentheearthisfirstcloakedintheeveningdarkness.Andtheyappearmoreoftenbecauseofahugebuildupofmeth

4、anegasintheatmosphere.　7)Becausewearenotyetawakenedtotakeeffectivemeasurestodealwiththeclimatechange.　8)Carbondioxide'sabilitytotrapheatintheatmospherecausesglobalwarming.Becauseglobalwarmingseriouslythreatenstheglobalclimateequilibriumthatdeterminesthepat-ternofwin

5、ds,rainfall,surfacetemperatures,oceancur-rents,andsealevel.Theseinturndeterminethedistributionofvegetativeandanimallifeonlandandseaandhaveagreateffectonthelocationandpatternofhumansocieties.　9)Thetwokeyfactorsarehumanpopulationandthescientificandtechnologicaldevelop

6、ment.Thedramaticchangesthathaveoccurredinthesetwofactorsareasuddenandstartlingsurgeinhumanpopulationandasuddenaccelerationofthescientificandtechnologicalrevolution.　10)Thewriter'ssolutiontoourecologicalproblemsistoreinventandfinallyhealtherelationshipbetweenhumanbei

7、ngsandtheearthbycarryingoutacarefulreassessmentofallthe{actorsthatledtotherelativelyrecentdramaticchangeintherelationship.Ⅱ.　1)Itwasnotatallpossibletocatchalargeamountoffish.　2)Followingthelayersoficeinthecoresample,hisfingercametotheplacewherethelayer13oficewasform

8、ed2050yearsago.　3)keepsitsenginesrunningforfearthatifhestopsthem,themetalpartswouldbefrozensolidandtheengineswouldnotbeabletostartagain　4)