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1、2009年海文考研导学班讲义词汇综述篇A完型填空A1关连词1Sleepisdividedintoperiodsofso-calledREMsleep,characterizedbyrapideyemovementsanddreaming,andlongerperiodsofnonprimesleep.41kindofsleepisatallwellunderstood,butREMsleepis42toservesomerestorativefunctionofthebrain.Thepurposeo
2、fnon-REMsleepisevenmore43・Thenewexperiments,suchasthose44forthefirsttimeatarecentmeetingoftheSocietyforSleepResearchinMinneapolis,suggestfascinatingexplanations45ofnon-REMsleep.Forexample,ithaslongbeenknownthattotalsleep46is100percentfataltorats,yet,47e
3、xaminationofthedeadbodies,theanimalslookcompletelynormal.Aresearcherhasnow48themysteryofwhytheanimalsdie.Therats49bacterialinfectionsoftheblood,50theirimmunesystems,theselfprotectingmechanismagainstdiseases.hadcrashed.41.(A)Either(B)Neither(C)Each(D)Any
4、50.(A)if(B)asif(C)onlyif(D)ifonly2Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimals,includingman.Theydonotprovideenergy,41dotheyconstructorbuildanypartofthebody.Theyareneededfor42foodsintoenergyan
5、dbodymaintenance・Therearethirteenormoreofthem,andif43ismissingadeficiencydiseasebecomes44・Vitaminsaresimilarbecausetheyaremadeofthesameelements-usuallycarbon,hydrogen,oxygen,and45nitrogen.Theyaredifferent46_theirelementsarearrangeddifferently,andeachvit
6、amin47oneormorespecificfunctionsinthebody.48enoughvitaminsisessentialtolife,althoughthebodyhasnonutritionalusefor49vitamins.Manypeople,50,believeinbeingontheHsafesideHandthustakeextravitamins.However,awell-balanceddietwillusuallymeetallthebody'svitaminn
7、eeds・41.[A]either[B]so[C]nor[D]never46.[A]inthat[B]sothat[C]suchthat[D]exceptthat50.[A]Fievertheleus[B]therefore[C]moreover[D]meanwhileA2适用语境1义近词Thefirstandsmallestunitthatcanbediscussedinrelationtolanguageistheword.Inspeaking,thechoiceofwordsis(41)theu
8、tmostimportance.Properselectionwilleliminateonesourceof(42)breakdowninthecommunicationcycle.Toooften,carelessuseofwords(43)ameetingofthemindsofthespeakerandthelistener.Thewordsusedbythespeakermay(44)unfavorablereactionsintheliste
