- 阅读理解A
题干：Intheirworldofdarkness,itwouldseemlikelythatsomeoftheanimalsmighthavebecomeblind,ashashappenedtosomecavefauna.So,indeed,manyofthemhave,compensatingforthelackofeyeswithmarvelouslydevelopedfeelersandlong,slenderfinsandprocesseswithwhichtheygropetheirway,likesomanyblindmenwithcanes,theirwholeknowledgeoffriends,enemies,orfoodcomingtothemthroughthesenseoftouch.Thelasttracesofplantlifeareleftbehindinthethinupperlayerofwater,fornoplantcanlivebelowabout600feeteveninveryclearwater,andfewfindenoughsunlightfortheirfood-manufacturingactivitiesbelow200feet.Sincenoanimalcanmakeitsownfood,thecreaturesofthedeeperwatersliveastrange,almostparasiticexistenceofutterdependenceontheupperlayers.Thesehungrycarnivorespreyfiercelyandrelentlesslyuponeachother,yetthewholecommunityisultimatelydependentupontheslowrainofdescendingfoodparticlesfromabove.Thecomponentsofthisnever-endingrainarethedeadanddyingplantsandanimalsfromthesurface,orfromoneoftheintermediatelayers.Foreachofthehorizontalzonesorcommunitiesoftheseathatliebetweenthesurfaceandtheseabottom,thefoodsupplyisdifferentandingeneralpoorerthanforthelayerabove.Pressure,darkness,andsilencearetheconditionsoflifeinthedeepsea.Butweknownowthattheconceptionoftheseaasasilentplaceiswhollyfalse.Wideexperiencewithhydrophonesandotherlisteningdevicesforthedetectionofsubmarineshasprovedthat,aroundtheshorelinesofmuchoftheworld,thereistheextraordinaryuproarproducedbyfishes,shrimps,porpoisesandprobablyotherformsnotyetidentified.Therehasbeenlittleinvestigationasyetofsoundinthedeep,offshoreareas,butwhenthecrewoftheAtlantisloweredahydrophoneintodeepwateroffBermuda,theyrecordedstrangemewingsounds,shrieks,andghostlymoans,thesourcesofwhichhavenotbeentraced.Butfishofshallowerzoneshavebeencapturedandconfinedinaquaria,wheretheirvoiceshavebeenrecordedforcomparisonwithsoundsheardatsea,andinmanycasessatisfactoryidentificationcanbemade.DuringtheSecondWorldWarthehydrophonenetworksetupbytheUnitedStatesNavytoprotecttheentrancetoChesapeakeBaywastemporarilymadeuselesswhen,inthespringof1942,thespeakersatthesurfacebegantogiveforth,everyevening,asounddescribedasbeinglike“apneumaticdrilltearinguppavement”.Theextraneousnoisesthatcameoverthehydrophonescompletelymaskedthesoundsofthepassageofships.Eventuallyitwasdiscoveredthatthesoundswerethevoicesoffishknownascroakers,whichinthespringmoveintoChesapeakeBayfromtheoffshorewinteringgrounds.Assoonasthenoisehadbeenidentifiedandanalyzed,itwaspossibletoscreenitoutwithanelectricfilter,sothatoncemoreonlythesoundsofshipscamethroughthespeakers.
题目：Many underwater animals cannot see because（）. - A 、the lack of light has gradually eliminated their capacity to see
- B 、they use sound waves instead of light to navigate in the darkness
- C 、they have learned to survive without seeing their enemies or their prey
- D 、their sense of touch has eliminated their need to see
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参考答案【正确答案：A】
第一段提到，在黑暗的世界里，像其他穴居动物一样，水生动物很可能是看不见的。的确，它们许多是这样，为了补偿视觉的缺乏，它们奇迹般地生长出触角判断哪些是朋友，哪些是敌人，哪些是可吃的食物。可见，海底的黑暗是造成它们看不见的原因，而触觉发达则是变盲以后的结果，所以选项D是不对的。
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- A 、adequate for
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- A 、proceed
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- A 、prefer part-time jobs to full-time jobs
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- B 、More liability insurance required
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- A 、they have developed sharp teeth and strong jaws with which to kill their prey
- B 、plants that grow far below the surface are not edible
- C 、animals cannot make their own food, so they eat each other
- D 、most surface vegetation is eaten before it sinks to the bottom of the sea
- 8 【阅读理解A】The extinction of large prehistoric animals is noted to suggest that_____.
- A 、large animals were vulnerable to the changing environment
- B 、small species survived as large animals disappeared
- C 、large sea animals may face the same threat today
- D 、slow-growing fish outlive fast-growing ones
- 9 【阅读理解A】Why can many people see “silver linings” to the economic slowdown?
- A 、They would benefit in certain ways.
- B 、The stock market shows signs of recovery.
- C 、Such a slowdown usually precedes a boom.
- D 、The purchasing power would be enhanced.
- 10 【阅读理解B】For many Canadians
- A 、business always emphasized themaintenance of customers.
- B 、they can directly get the service they need.
- C 、few customers will appeal to claims court.
- D 、impoliteness is a kind of bad service.
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