书面表达增分练.doc

书面表达增分练.doc

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1、书面表达增分练(一)建议用时:35分钟Ⅰ.任务型阅读(2014·扬州模拟)请阅读下面短文,并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意:每个空格只填一个单词。  Insimplewords,hibernationisastateofdeepsleep.Hibernationdiffersfromnormalsleepinvariousways.Hibernatinganimalstakealongtimetowakeupfromtheirsleep.Turningorkickingtheirbodiesdoesnot

2、seemtowakethemup.Evenafterwakingupfromhibernation,theseanimalstakesometimetorestarttheirnormalactivities.Duringhibernation,theheartrateslowsdownandsomeofthenon-vitalorgansbecomeentirelyinactive.Thisisastateinwhichthebodyusesverylittleenergy.  Winteristhetimewhenfoodisle

3、ssandweatherrough.Animalshavetospendalotofenergyfindingfood.Eveniftheysucceedinfindinganything,itisoftennotenoughtomakeupforthelossofenergy.Besides,thecoldweathermayoftenbecomeacauseofdeath.Asaresultofallthese,animalshavetoreducetheirfooddemandbyreducingenergyrequiremen

4、ts.Thisisachievedbyhibernatingthroughoutthewinter.  Beforetheonsetofwinter,whenthereisplentyoffood,animalseatovermuchandstoremuchofthefoodintheformoffat.Aswinterarrives,theyreturntotheirhomewheretheyspendtherestofwinterhibernating.Asanimalshibernate,theirbodytemperature

5、startsdroppingduetolackofactivityandmetabolism(新陈代谢).Atonepoint,itisonlyafewdegreeshigherthanthesurroundingtemperature.Whateverenergythebodyneedstoperformcertaintasksisgotfromthefatstorage.Duetolackofactivity,thefatburningprocessisslowandsteady.Theenergyfromfatisenought

6、okeeptheanimalalivefortherestofthewinter.Hibernationdiffersforeveryspecies.Forexample,someanimalslikeblackbearsmaysleepforthewholewinterwithoutwakingupwhileanimalslike,squirrelsmaywakeupevery4daystoeatsomefood,passwastematterfromthebody,andthengobacktosleep.Hibernationi

7、ndomesticanimalsmaydifferfromthatinthewildones.Asthereisnofoodshortagefordomesticanimals,domesticanimalshibernateasaresultoftheirnaturalinstinctbutwithmoreactiveperiodsinbetween.Hibernation(1)   Astateofdeepsleep(2)fromnormalsleep*Takingalongtimetowakeup*Takingsometimet

8、o(3)   theirnormalactivitiesagain*Usingverylittleenergy-12-Reasonsforhibernating*Notfindingenoughfoodtomakeupf

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