1990-1999年考研英语试题

1990年全国硕士研究生入学统一考试英语试题CloseTest®Nooneknowsforsurewhattheworldwouldbelikeintheyear2001.②Manybookshavebeenwritten]thefuture.③Butthe191-centuryFrenchnovelistJulesVernemaybecalledafuturologistinthefullest2oftheword.@Inhisfantasticnovels“ATriptotheMoon”and"80DaysAroundtheWorld,"hedescribedwithdetailtheaeroplaneandeventhehelicopte匚⑤Thesenovelsstillhaveagreatattraction3youngreadersoftodaybecauseoftheirboldimaginationandscientificaccuracy.⑥Belowisadescriptionofwhatourlifewillbeintheyear2001aspredictedbya_4writer.©In2001,inthehome,cookerswillbesetsothatyoucancookacompletemealatthetouchofaswitch.©Televisionwillprovideinformationonpricesatthe5shopsaswellasnewsandentertainment.©Videophoneswillbringpicturesaswellas6totelephoneconversations.©Machineswillcontroltemperature,lighting,entertainment,securityalarms,laundryandgardening.©Lightingwillprovidedecorationaswellaswallpaper.©Atwork,robotswilltake7mostjobsinthemanufacturingindustries.©Workinghourswillfalltounder30hoursaweek.©Holidayswillgetlonger;sixweekswillbethenormalannualholiday.©Menandwomenwillretireatthesameage.®Ourleisurewillbedifferenttoo.©Thehomewillbecomethecenterofentertainmentthroughtelevisionandelectronicgames.©Morepeoplewilleatoutinrestaurants8theydotoday;alsotheywillhaveamuchwidervarietyoffoodavailable.©Therewillbeachangeoftastetowardsamoresavoury-flavoredmenu.⑳Newsyntheticfoodswillforma9partofpeople'sdiets.©Foreigntravelwill10：winterholidayswillbecomemorepopularthansummerones.©Alsonon-stopflightsfromBritaintoAustraliaandNewZealandwillbeeasilyavailableandmuchcheaper.©Educationwillbecomeincreasinglymoreimportantthaneverbefore.(321words)1.[A]in[B]of[c]about[D]for2.[A]sense[B]meaning[c]detail[D]implication3.[A]for[B]of[C]on[D]towards4.[A]today[B]nowadays[C]present-day[D]present5.[A]near[B]nearby[C]nearly[D]nearer6.[A]noise[B]sound[C]tone[D]tune7.[A]to[B]away[c]off[D]over8.[A]than[B]as[c]when[D]while9.[A]usual[B]popular[C]daily[D]regular10.[A]add[B]increase[C]raise[D]ariseReadingComprehensionText1①InMay1989,spaceshuttle“Atlantis“releasedinouterspacethespaceprobe"Megallan,"whichisnowonher15-monthandone-billion-kilometerflighttoVenus.(2)Anewphaseinspaceexplorationhasbegun.@TheplanetVenusisonlyslightlysmallerthanEarth;itistheonlyotherobjectinthesolarsystem,infact,thatevencomesclosetoearth'ssize.②Venushasasimilardensity,soitisprobablymadeofapproximatelythesamestuff,andithasanatmosphere,completewithclouds.(3)Itisalsotheclosestplanettoearth,andthusthemostsimilarindistancefromthesun.④Inshort,Venusseemstojustifyitslong-heldnicknameof“earth'stwin."®ThesurfacetemperatureofVenusreachessome900F.②Addedtothatisanatmosphericpressureabout90timesEarth's:Highoverheadinthecarbondioxide(CCh)thatpassesforairisalayerofclouds,perhaps10to20milesthick,whoselittledropsconsistmostlyofsulfuricacid(H2SO4).③Waterisallbutnonexistent.®Bomwithsomanyfundamentalsimilaritiestoearth,howdidVenusgettobesoradicallydifferent:Itisnotjustanacademicmatter.②Forallitsextremes,Venusisavaluablelaboratoryforresearchersstudyingtheweatherandclimateofearth.(3)Ithasnoearth'soceans,sotheheattransportandothermechanismsaregreatlysimplified.@Inaddition,theplanetVenustakes243earth-daystoturnonceonitsaxis,soincomingheatfromthesunisaddedanddistributedatamoreleisurely,observablepace.VenusissimilartoEarthin一A.sizeanddensityB.distancefromthesunC.havingatmosphereD.alloftheaboveThegreatestvalueinstudyingVenusshouldbeto_A.allowustovisitthereB.understandEarthbetterC.findanewsourceofenergyD.promoteanewspaceprogramThemainideaofthispassageisabout_A.problemsofspacetravelB.scientificmethodsinspaceexplorationC.theimportanceofVenustoEarthD.conditionsonVenusText2©TouristsweresurprisedtoseeawomandrivingahugeorangetractordownoneofRome'smainavenues.©Italy'spoliticalleadersandsomeofitsmaleunionchiefcaresaidtohavebeenevenmorepuzzledtoseethatthetractorwasfollowedbyabout200,000womeninaparadingprocessionthattookmorethanthreehourstosnakethroughcentralRome.®Shoutingslogans,wavingflagsanddancingtodrumbeats,thewomenhadcometothecapitalfromalloverItalytodemonstratefor44ajobforeachofus,adifferenttypeofjob,andasocietywithoutviolence."②Sofar,actiontoimprovewomen'sopportunitiesinemploymenthasbeentheprovinceofcollectiveindustrialbargaining.③“Butthereisagrowingawarenessthatthisisnotenough,"saysaresearcheronfemalelaboratthegovernment-fundedInstitutefortheDevelopmentofProfessionalTrainingforWorkers.®Women,whoconstitute52percentofItaly'spopulation,todayrepresentonly35percentofItaly'stotalworkforceand33percentofthetotalnumberofItalianswithjobs.©However,theirpresenceintheworkplaceisgrowing.③Theemploymentofwomenisexpandingconsiderablyinservices,nexttothepublicadministrationandcommerceastheirprincipalworkplace.©Officialstatisticsalsoshowthatwomenhavealsomadesignificantstridesinself-employment.⑤Moreandmorewomenaregoingintobusinessforthemselves.©Manyyoungwomenareturningtobusinessbecauseofthegrowingoverallinemployment.@Itisalsoafactthattodaymanyprejudiceshavedisappeared,sothatbanksandotherfinancialinstitutesmakejudgmentsonpurelybusinessconsiderationswithoutcaringifitisamanorawoman.©Suchchangesareoccurringintheprofessionstoo.②Thenumberofwomendoctors,dentists,lawyers,engineersanduniversityprofessorsincreasedtwotothreefold.③Someofthechangesareimmediatelyvisible.④Forexample,womenhaveappearedonthesceneforthefirsttimeasstatepolice,railwayworkersandstreetcleaners.©However,thepresentsituationisfarfromsatisfactorythoughsomeprogresshasbeenmade.②Abreakthroughinequalopportunitiesforwomenisnowdemanded.19.Theexpression“snakethroughcentralRome"probablymeans"tomove_quietlythroughcentralRome"violentlythroughcentralRome"inalongwindinglinethroughcentralRome"ataleisurelypacethroughcentralRome"20.WhichofthefollowingstatementsisNOTtrue?TherearemorewomenthanmeninItaly.InItaly,womenarechieflyemployedinservices.InItaly,womenarestillatadisadvantageinemployment.InItaly,abouttwo-thirdsofthejobsareheldbymen.21.About200,000womeninRomedemonstratedfor_A.morejobopportunitiesB.agreatervarietyofjobsC."equaljob,equalpay"D.bothAandB22.Thebesttitleforthispassagewouldbe_TheRoleofWomenisSocietyWomenDemonstrateforEqualityinEmploymentWomenasSelf-enlployedProfessionalsWomenandtheJobsMarketText3©Theoldideathattalentedchildren“bumthemselvesout"intheearlyyears,and,therefore,aresubjectedtofailureandatworst,mentalillnessisunfounded.②Asamatteroffact,theoutstandingthingthathappenstobrightkidsisthattheyareverylikelytogrowintobrightadults.Tofindthisout,1,500giftedpersonswerefolloweduptotheirthirty-fifthyearwiththeseresults:©Onadultintelligencetests,theyscoredashighastheyhadaschildren.②Theywere,asagroup,ingoodhealth,physicallyandmentally.③84percentoftheirgroupweremarriedandseemedcontentwiththeirlives.©About70percenthadgraduatedfromcollege,thoughonly30percenthadgraduatedwithhonors.②Afewhadevendroppedout,butnearlyhalfofthesehadreturnedtograduate.(3)Ofthemen,80percentwereinoneoftheprofessionsorinbusinessmanagementorsemiprofessionaljobs.@Thewomenwhohadremainedsinglehadoffice,business,orprofessionaloccupations.Thegrouphadpublished90booksand1,500articlesinscientific,scholarly,andliterarymagazinesandhadcollectedmorethan100patents.@Inamaterialwaytheydidnotdobadlyeithe匚@Averageincomewasconsiderablyhigheramongthegiftedpeople,especiallythemen,thanforthecountryasawhole,despitetheircomparativeyouth.Infact,farfrombeingstrange,mostofthegiftedwereturningtheirearlypromiseintopracticalreality.Theoldideathattalentedchildren"bumthemselvesout*'intheearlyyearsis_A.trueinallsensesB.refutedbytheauthorC.medicallyprovenD.abeliefoftheauthorThesurveyofbrightchildrenwasmadetofindoutwhathadhappenedtotalentedchildrenwhentheybecameadultsprovethattalentedchildren"burnthemselvesout"intheearlyyearsdiscoverthepercentageofthosementallyillamongthegiftedprovethattalentedchildrenneverbumthemselvesout.Intelligencetestsshowedthat_brightchildrenwereunlikelytobementallyhealthybetweenchildhoodandadulthoodtherewasaconsiderablelossofintelligencetalentedchildrenweremostlikeLytobecomegiftedadultswhentalentedchildrengrewintoadults,theymadelowscoresSectionIIIEnglish-ChineseTranslationPeoplehavewonderedforalongtimehowtheirpersonalitiesandbehaviorsareformed.Itisnoteasytoexplainwhyonepersonisintelligentandanotherisnot,orwhyoneiscooperativeandanotheriscompetitive.Socialscientistsare,ofcourse,extremelyinterestedinthesetypesofquestions.(21)Theywanttoexplainwhywepossesscertaincharacteristicsandexhibitcertainbehaviors.Therearenoclearanswersyet,buttwodistinctschoolsofthoughtonthematterhavedeveloped.Asonemightexpect,thetwoapproachesareverydifferentfromeachother.Thecontroversyisoftenconvenientlyreferredtoas“naturevs.nurture/'(22)Thosewhosupportthe"nature"sideofthe8nflictbelievethatourpersonaltiesandbehaviorpatternsarelargelydeterminedbybiologicalfactors.(23)Thatourenvironmenthaslittle,ifanything,todowithourabilities,characteristicsandbehavioriscentraltothistheory.Takentoanextreme,thistheorymaintainsthatourbehaviorispre-determinedtosuchagreatdegreethatwearealmostcompletelygovernedbyourinstincts.Thosewhosupportthe"nurture^^theory,thatis,theyadvocateeducation,areoftencalledbehaviorists.Theyclaimthatourenvironmentismoreimportantthanourbiologicallybasedinstinctsindetermininghowwewillact.Abehaviorist,B.F.Skinner,seeshumansasbeingswhosebehaviorisalmostcompletelyshapedbytheirsurroundings.(24)Thebehavioristsmaintainthat,likemachines,humansrespondtoenvironmentalstimuliasthebasisoftheirbehavior.Letusexaminethedifferentexplanationsaboutonehumancharacteristic,intelligence,offeredbythetwotheories.(25)Supportersofthe"nature"theoryinsistthatwearebomwithacertaincapacityforlearningthatisbiologicallydetemiined.Needlesstosay:Theydon'tbelievethatfactorsintheenvironmenthavemuchinfluenceonwhatisbasicallyapredeterminedcharacteristic.Ontheotherhand,behavioristsarguethatourintelligencelevelsaretheproductofourexperiences.(26)Behavioristssuggestthatthechildwhoisraisedinanenvironmentwheretherearemanystimuliwhichdevelophisorhercapacityforappropriateresponseswillexperiencegreaterintellectualdevelopment.Thesocialandpoliticalimplicationsofthesetwotheoriesareprofound.(27)IntheUnitedStates,blacksoftenscorebelowwhitesonstandardizedintelligencetests.Thisleadssome“nature"proponentstoconcludethatblacksarebiologicallyinferiortowhites.(28)Behaviorist。incontrast,saythatdifferencesinscoresareduetothefactthatblacksareoftendeprivedofmanyoftheeducationalandotherenvironmentaladvantagesthatwhiteseqjoy.Mostpeoplethinkneitherofthesetheoriescanyetfullyexplainhumanbehavior.1991年全国硕士研究生入学统一考试英语试题Whentelevisionfirstbegantoexpand,veryfewofthepeoplewhohadbecomefamousasradiocommentatorswereabletobeequallyeffectiveontelevision.Someofthedifficultiestheyexperiencedwhentheyweretryingto 1 themselvestothenewmediumweretechnical.Whenworking 2radio,forexample,theyhadbecome 3 toseeingonbehalfofthelistener.This4ofseeingforothersmeansthatthecommentatorhastobeverygoodattalking. 5 all,hehastobeableto 6 acontinuoussequenceofvisualimageswhich 7 meaningtothesoundswhichthelistenerhears.Inthe 8 oftelevision,however,thecommentatorseeseverythingwiththeviewer.Hisrole,therefore,is 9 different.Heistheretomake 10 thattheviewerdoesnotmisssomepointofinterest,tohelphim 11 onparticularthings,andto 12 theimagesonthetelevisionscreen. 13 hisradiocolleague,hemustknowthe 14 ofsilenceandhowtouseitatthosemoments 15 thepicturesspeakforthemselves.SectionIIReadingComprehensionPassage1Awisemanoncesaidthattheonlythingnecessaryforthetriumphofevilisforgoodmentodonothing.So,asapoliceofficer,Ihavesomeurgentthingstosaytogoodpeople.DayafterdaymymenandIstruggletoholdbackatidalwaveofcrime.SomethinghasgoneterriblywrongwithouronceproudAmericanwayoflife.Ithashappenedintheareaofvalues.Akeyingredientisdisappearing,andIthink1knowwhatitis:accountability.Accountabilityisn'thardtodefine.Itmeansthateverypersonisresponsibleforhisorheractionsandliablefortheirconsequences.Ofthemanyvaluesthatholdcivilizationtogether-honesty,kindness,andsoon——accountabilitymaybethemostimportantofall.Withoutit,therecanbenorespect,notrust,nolaw—and,ultimately,nosociety.Myjobasapoliceofficeristoimposeaccountabilityonpeoplewhorefuse,orhaveneverlearned,toimposeitonthemselves.Butaseverypolicemanknows,externalcontrolsonpeople*sbehaviorarefarlesseffectivethaninternalrestraintssuchasguilt,shameandembarrassment.Fortunatelytherearestillcommunities-smallertowns,usually一whereschoolsmaintaindisciplineandwhereparentsholdupstandardsthatproclaim:4iInthisfamilycertainthingsarenottolerated—theysimplyarenotdone!MYetmoreandmore,especiallyinourlargercitiesandsuburbs,theseinnerrestraintsareloosening.Yourtypicalrobberhasnone.Heconsidersyourpropertyhisproperty;hetakeswhathewants,includingyourlifeifyouenragehim.Themaincauseofthisbreak-downisaradicalshiftinattitudes.Thirtyyearsago,ifacrimewascommitted,societywasconsideredthevictim.Now,inashockingreversal,itsthecriminalwhoisconsideredvictimized:byhisunderprivilegedupbringing,bytheschoolthatdidn'tteachhimtoread,bythechurchthatfailedtoreachhimwithmoralguidance,bytheparentswhodidn'tprovideastablehome.Idon'tbelieveit.Manyothersinequallydisadvantagedcircumstanceschoosenottoengageincriminalactivities.Ifwefreethecriminal,evenpartly,fromaccountability,webecomeasocietyofendlessexcuseswherenooneacceptsresponsibilityforanything.WeinAmericadesperatelyneedmorepeoplewhobelievethatthepersonwhocommitsacrimeistheoneresponsiblefbrit..Whatthewisemansaidsuggeststhat_.it'sunnecessaryforgoodpeopletodoanythinginfaceofevilit'scertainthatevilwillprevailifgoodmendonothingaboutitit'sonlynaturalforvinuetodefeatevilit'sdesirableforgoodmentokeepawayfromevilAccordingtotheauthor,ifapersonisfoundguiltyofacrime,_.societyistobeheldresponsiblemoderncivilizationisrnponsibleforitthecriminalhimselfshouldbeartheblamethestandardsoflivingshouldbeimprovedComparedwiththoseinsmalltowns,peopleinlargecitieshave—.A.lessself-disciplineB.bettersenseofdisciplineC.moremutualrespect.D.lesseffectivegovernmentThewriterissorrytohavenoticedthat_.peopleinlargecitiestendtoexcusecriminalspeopleinsmalltownsstillsticktoolddisciplineandstandardstoday'ssocietylackssympathyforpeopleindifficultypeopleindisadvantagedcircumstancesareengagedincriminalactivitiesThekeypointofthepassageisthat_.stricterdisciplineshouldbemaintainedinschoolsandfamiliesmoregoodexamplesshouldbesetforpeopletofollowmorerestrictionsshouldbeimposedonpeople'sbehaviormorepeopleshouldacceptthevalueofaccountabilityPassage2Theperiodofadolescence,i.e.,theperiodbetweenchildhoodandadulthood,maybelongorshort,dependingonsocialexpectationsandonsociety*sdefinitionastowhatconstitutesmaturityandadulthood.Inprimitivesocietiesadolescenceisfrequentlyarelativelyshortperiodoftime,whileinindustrialsocietieswithpatternsofprolongededucationcoupledwithlawsagainstchildlabor,theperiodofadolescenceismuchlongerandmayincludemostoftheseconddecadeofone'slife.Furthermore,thelengthoftheadolescentperiodandthedefinitionofadulthoodstatusmaychangeinagivensocietyassocialandeconomicconditionschange.ExamplesofthistypeofchangearethedisappearanceofthefrontierinthelatterpartofthenineteenthcenturyintheUnitedStates,andmoreuniversally,theindustrializationofanagriculturalsociety.Inmodernsociety,ceremoniesforadolescencehavelosttheirformalrecognitionandsymbolicsignificanceandtherenolongerisagreementastowhatconstitutesinitiationceremonies.Socialoneshavebeenreplacedbyasequenceofstepsthatleadtoincreasedrecognitionandsocialstatus.Forexample,gradeschoolgraduation,highschoolgraduationandcollegegraduationconstitutesuchasequence,andwhileeachstepimpliescertainbehavioralchangesandsocialrecognition,thesignificanceofeachdependsonthesocio-economicstatusandtheeducationalambitionoftheindividual.Ceremoniesforadolescencehavealsobeenreplacedbylegaldefinitionsofstatusroles,right,privilegesandresponsibilities.Itisduringthenineyearsfromthetwelfthbirthdaytothetwenty-firstthattheprotectiveandrestrictiveaspectsofchildhoodandminorstatusareremovedandadultprivilegesandresponsibilitiesaregranted.Thetwelve-year-oldisnolongerconsideredachildandhastopayfullfarefortrain,airplane,theaterandmovietickets.Basically,theindividualatthisageloseschildhoodprivilegeswithoutgainingsignificantadultrights.Attheageofsixteentheadolescentisgrantedcertainadultrightswhichincreasehissocialstatusbyprovidinghimwithmorefreedomandchoices.Henowcanobtainadriver*slicense;hecanleavepublicschools;andhecanworkwithouttherestrictionsofchildlaborlaws.Attheageofeighteenthelawprovidesadultresponsibilitiesaswellasrights;theyoungmancannowbeasoldier,buthealsocanmarrywithoutparentalpermission.Attheageoftwenty-onetheindividualobtainshisfulllegalrightsasanadult.Henowcanvote,hecanbuyliquor,hecanenterintofinancialcontracts,andheisentitledtorunforpublicoffice.Noadditionalbasicrightsareacquiredasafunctionofageaftermajoritystatushasbeenattained.Noneoftheselegalprovisionsdetermineatwhatpointadulthoodhasbeenreachedbuttheydopointtotheprolongedperiodofadolescence..Theperiodofadolescenceismuchlongerinindustrialsocietiesbecause_.thedefinitionofmaturityhaschangedtheindustrializedsocietyismoredevelopedmoreeducationisprovidedandlawsagainstchildlaboraremadeceremoniesforadolescencehavelosttheirformalrecognitionandsymbolicsignificanceFormersocialceremoniesthatusedtomarkadolescencehavegivenplaceto_.A.graduationsfromschoolsandcollegesB.socialrecognitionC.socio-economicstatusD.certainbehavioralchangesNoonecanexpecttofullyenjoytheadulthoodprivilegesuntilheis—.A.elevenyearsoldB.sixteenyearsoldC.twenty-oneyearsoldD.betweentwelveandtwenty-oneyearsoldStartingfrom22,_.onewillobtainmorebasicrightstheolderonebecomes,themorebasicrightshewillhaveonewon'tgetmorebasicrightsthanwhenheis21D.onewillenjoymorerightsgrantedbvsociety.Accordingtothepassage,itistruethatinthelate19thcenturyintheUnitedStatesthedividinglinebetweenadolescenceandadulthoodnolongerexistednoonecanmarrywithoutthepermissionofhisparentsuntiltheageoftwenty-oneC.oneisconsideredtohavereachedadulthoodwhenhehasadriver'slicenseD.oneisnotfreefromtherestrictionsofchildlaborlawsuntilhecanjointhearmyPassage3Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropertotermtheplantawaterstructureastocallahousecomposedmainlyofbrickabrickbuilding.Certainitisthatallessentialprocessesofplantgrowthanddevelopmentoccurinwater.Themineralelementsfromthesoilthatareusablebytheplantmustbedissolvedinthesoilsolutionbeforetheycanbetakenintotheroot.Theyarecarriedtoallpartsofthegrowingplantandarebuiltintoessentialplantmaterialswhileinadissolvedstate.Thecarbondioxide(CO2)fromtheairmayentertheleafasagasbutisdissolvedinwaterintheleafbeforeitiscombinedwithapartofthewatertoformsimplesugars—thebasematerialfromwhichtheplantbodyismainlybuilt.Activelygrowingplantpartsaregenerally75to90percentwater.Structuralpartsofplants,suchaswoodystemsnolongeractivelygrowing,mayhavemuchlesswaterthangrowingtissues.Theactualamountofwaterintheplantatanyonetime,however,isonlyaverysmallpartofwhatpassesthroughitduringitsdevelopment.Theprocessesofphotosynthesis,bywhichcarbondioxideandwaterarecombined一inthepresenceofchlorophyll(叶绿素)andwithenergyderivedfromlight—toformsugars,requirethatcarbondioxidefromtheairentertheplant.Thisoccursmainlyintheleaves.Theleafsurfaceisnotsolidbutcontainsgreatnumbersofminuteopenings,throughwhichthecarbondioxideenters.Thesamestructurethatpermitstheonegastoentertheleaf,however,permitsanothergas一watervapor-tobelostfromit.Sincecarbondioxideispresentintheaironlyintracequantities(3to4partsin10,000partsofair)andwatervaporisnearsaturationintheairspaceswithintheleaf(at80T,saturatedairwouldcontainabout186partsofwatervaporin10,000partsofair),thetotalamountofwatervaporlostismanytimesthecarbondioxideintake.Actually,becauseofwindandotherfactors,thelossofwaterinproportiontocarbondioxideintakemaybeevengreaterthantherelativeconcentrationsofthetwogases.Also,notallofthecarbondioxidethatenterstheleafissynthesizedintocarbohydrates(碳水化合物).41.Agrowingplantneedswaterforallofthefollowingexcept—.A.formingsugarsB.sustainingwoodystemsC.keepinggreenD.producingcarbondioxide42.Theessentialfunctionofphotosynthesisintermsofplantneedsis_.A.toformsugarsB.toderiveenergyfromlighttopreservewaterD.tocombinecarbondioxidewithwater.Thesecondparagraphusesfactstodeveloptheessentialideathat—.aplantefficientlyutilizesmostOfthewateritabsorbscarbondioxideistheessentialsubstanceneededforplantdevelopmentaplantneedsmorewaterthanisfoundinitscompositionthestrongerthewind,themorethewatervaporloss.Accordingtothepassage,whichofthefollowingstatementsisTRUE?Themineralelementswillnotbeabsorbedbytheplantunlesstheyaredissolvedinitsroot.Thewoodystemscontainmorewaterthantheleaves.Airexistingaroundtheleafisfoundtobesaturated.Onlypartofthecarbondioxideintheplantsissynthesized..Thispassageismainlyabout_.thefunctionsofcarbondioxideandwatertheroleofwaterinagrowingplanttheprocessofsimplesugarformationthesynthesisofwaterwithcarbondioxidePartBThefactisthattheenergycrisis,whichhassuddenlybeenofficiallyannounced,hasbeenwithusforalongtimenow,andwillbewithusforanevenlongertime.WhetherAraboilflowsfreelyornot,itiscleartoeveryonethatworldindustrycannotbeallowedtodependonsofragileabase.⑶)Thesupplyofoilcanbeshutoffunexpectedlyatanytime,andinanycase,theoilwellswillallrundr