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1、2010年考研基础班词汇与作文讲义词汇-综述篇A完型填空A1关连词1Sleepisdividedintoperiodsofso-calledREMsleep,characterizedbyrapideyemovementsanddreaming,andlongerperiodsofnonprimesleep.41kindofsleepisatallwellunderstood,butREMsleepis42toservesomerestorativefunctionofthebrain.Thepurposeofnon-REM
2、sleepisevenmore43.Thenewexperiments,suchasthose44forthefirsttimeatarecentmeetingoftheSocietyforSleepResearchinMinneapolis,suggestfascinatingexplanations45ofnon-REMsleep.Forexample,ithaslongbeenknownthattotalsleep46is100percentfataltorats,yet,47examinationofthedeadb
3、odies,theanimalslookcompletelynormal.Aresearcherhasnow48themysteryofwhytheanimalsdie.Therats49bacterialinfectionsoftheblood,50theirimmunesystems,theselfprotectingmechanismagainstdiseases,hadcrashed.41.A.EitherB.NeitherC.EachD.Any50.A.ifB.asifC.onlyifD.ifonly2Vitami
4、nsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimals,includingman.Theydonotprovideenergy,41dotheyconstructorbuildanypartofthebody.Theyareneededfor42foodsintoenergyandbodymaintenance.Therearethirteenormoreofthem,andif4
5、3ismissingadeficiencydiseasebecomes44.Vitaminsaresimilarbecausetheyaremadeofthesameelements-usuallycarbon,hydrogen,oxygen,and45nitrogen.Theyaredifferent46theirelementsarearrangeddifferently,andeachvitamin47oneormorespecificfunctionsinthebody.48.enoughvitaminsisesse
6、ntialtolife,althoughthebodyhasnonutritionalusefor49vitamins.Manypeople,50,believeinbeingonthe"safeside"andthustakeextravitamins.However,awell-balanceddietwillusuallymeetallthebody'svitaminneeds.41.A.eitherB.soC.norD.never46.A.inthatB.sothatC.suchthatD.exceptthat50.
7、A.neverthelessB.thereforeC.moreoverD.meanwhileA2适用语境1义近词Thefirstandsmallestunitthatcanbediscussedinrelationtolanguageistheword.Inspeaking,thechoiceofwordsis(41)theutmostimportance.Properselectionwilleliminateonesourceof(42)breakdowninthecommunicationcycle.Toooften,
8、carelessuseofwords(43)ameetingofthemindsofthespeakerandthelistener.Thewordsusedbythespeakermay(44)unfavorablereactionsinthelistener(45)interferew
