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Lightning is a ______ of electrical current from a el6ud to the ground or from one cloud to another.
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英语《单项选择》真题及答案
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?????????????VoltsfromtheSky??1．Lightninghascaused
?????????????VoltsfromtheSky??1．Lightninghascaused
?????????????VoltsfromtheSky??1．Lightninghascaused
OnApril25th2007thousandsofRussianswenttosayfarewel
electing
elected
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Weoftenhearthephrase:You'veagreaterchanceofbeingst
?????????????VoltsfromtheSky??1．Lightninghascaused
?????????????VoltsfromtheSky??1．Lightninghascaused
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Idon’tknow________.
who of them should we elect
who of them we should elect
which of them I should elect
which of them should I elect
阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～6段每段选择1个正
VoltsfromtheSky??1Lightninghascausedaweandwondersi
OnApril25th2007thousandsofRussianswenttosayfarewel
electing
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to elect
elect
VoltsfromtheSky??1Lightninghascausedaweandwondersi
单项选择Wedecidedto____Tomtobethechiefeditorandvote___
elect; to
choose; to
pick out; for
elect; for
VoltsfromtheSky??1Lightninghascausedaweandwondersi
OnApril25th2007thousandsofRussianswenttosayfarewel
electing
elected
to elect
elect
VoltsfromtheSky??1Lightninghascausedaweandwondersi
Inearliesttimesmenconsideredlightning闪电tobeoneofth
Beforethemeetingtheyexchangedviewsonthequestionof_
whom to be elected
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whom to elect
阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～6段每段选择1个正
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A.ButIhavetowork. B.Coffeeplease. C.Fineandyou D.MaybeJoan E.Thanks. F.Goodluck. G.Youtoo. H.Yeshereyouare. David:WhatdoyouliketodrinkJack:______
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytoremembersolutionfromthelasttimetheyhada21problem.Theyoftenaccepttheopinionorideasofotherpeople.Othertimestheybegintoactwithout22theytrytofindasolutionbytrialanderror.Howeverwhenallofthesemethods23thepersonwithaproblemhastostartanalysing.Thereareseveralstagesinanalysingaproblem. Firstthepersonmustrecognizethatthereisaproblem.ForexampleSam’sbicycleisbroken.Sammust24thatthereisaproblemwithhisbicycle.Nextthepersonmust25theproblem.Samcanrepairhisbicyclehemustknowwhyitdoesnotwork.Nowthepersonmustlookfor26thatwillmaketheproblemclearerandleadtopossiblesolutions.SupposeSamdecidesthathisbikedoesnotworkbecausethereissomethingwrongwiththebrakes.Atthistimehecanlookinhisbicyclerepairbookand27hisfriendsatthebikeshop.After28.theproblemthepersonshouldhaveseveralsuggestionsforapossiblesolution.Intheendonesuggestionseemstobethesolution29theproblem.Samforexamplesuddenlyseesthereisapieceofchewinggum口香糖stacktoabrake.Whathewilldoistocleanthebrake.Finallythesolutionis30.Samdoesitandfindshisbicycleworksperfectly.Inshorthehassolvedtheproblem. 26
A．music B．plastic C．ocean D．public
PassageTwo Havingnolanguageinfantscannotbetoldwhattheyneedtolearn.Yetbytheageofthreetheywillhavemasteredthebasicstructureoftheirnativelanguageandwillbewellontheirwaytocommunicativecompetence.Acquiringtheirlanguageisamostimpressiveintellectualfeat.Studentsofhowchildrenlearnlanguagegenerallyagreethatthemostremarkableaspectofthisfeatistherapidacquisitionofgrammar.Neverthelesstheabilityofchildrentoconformtogrammaticalrulesisonlyslightlymorewonderfulthantheirabilitytolearnwords.IthasbeenreckonedthattheaveragehighschoolgraduateintheUnitedStateshasareadingvocabularyof80000wordswhichincludesidiomaticexpressionsandpropernamesofpeopleandplaces.Thisvocabularymusthavebeenlearnedoveraperiodof16years.Fromthefiguresitcanbecalculatedthattheaveragechildlearnsatarateofabout13newwordsperday.Clearlyalearningprocessofgreatcomplexitygoesonarapidrateinchildren. Theunderlinedwordfeatisclosestinmeaningtowhichofthefollowing
PassageFive Thecomputerisawonderfulmachine.Itisthemostimportantinventionsincethetypeofengineusedincars.Todayithasthegreatesteffectonscienceindustryandbusinessbutitisbeingusedmoreineducationandmedicine.Bytheendofthiscenturyitwilltouchthelivesofeveryoneevenpeopleindistantvillages.Itisarevolutionaryinvention. TheoldestkindofcomputeristheabacususedinChinasincethesixthcentury.Intheseventeenthcenturyanaddingmachinewasinventedbutthefirstlargemoderncomputerwasbuiltin1973.Afewyearslateracomputercoulddo5000additionspersecond.Nowthecomputationsaresofastthattheyaremeasuredinnanoseconds. Todaymostcomputersarestored-programcomputersthatistheyhaveamemory.Theyaregettingsmallerandsmallerandcomputingfasterandfaster.Eveninalargecomputerthepartthatdoestheactualcomputingisaboutthesizeoftheendofafinger. Computerscandoallkindsofwork.Whensomeonebuyssomethinginadepartmentstoreinformationaboutthesalegoesintoacomputer.Ascientistcantalktothecomputerabouttherocksandthecomputeranswersthequestions.Adoctorcantalktothecomputerandexplainswhatiswrongwithapatient.Ifthedoctoraskswhythecomputergoesthroughitsstoredinformationandexplainsexactlywhy. Whenearlyhumansbeganfanningitwasarevolutionarychangeinhumanlife.Itwashundredsofthousandsofyearslaterthatpeopledevelopedawritingsystem.Inlessthanfiftyyearspeoplehavedevelopedcomputersthatcandomostofthethingshumanscando.Thiscouldbeafrighteningdevelopment. Astored-programcomputerhas
PassageFour Mr.Smithwasawealthyindustrialistbuthewasnotsatisfiedwithlife.Hedidnotsleepwellandhisfooddidnotagreewithhim.Thissituationlastedforsometime.Finallyafterseveralsleeplessnightshedecidedtoconsulthisdoctor.Thedoctoradvisedachangeofsurroundings."Goabroad"hesaid."ButI’mnotgoodatforeignlanguage"saidMr.Smith."Itdoesn’tmatter"saidthedoctor."Itwon’thurtyoutotalkalittleless.Goonavoyage.Takeplentyofexercise.Trytoreduceyourweight.Avoidrichfood." Mr.Smithwenttoswitzerland.HedidnotknowFrenchorGermanandhadtocommunicatethroughgestures.Heattendedaphysicaltrainingcourse.Theinstructormadehimbendhiskneesswinghisarmsstretchhisneckandshakehisheadrapidly.Hebadtolieonthegroundandraisehisrightandleftlegsalternately.Afteratimehismusclesgrewhardandfirm.Heforgotthefinancialcrisisandtheimportanceofraisingthelevelofproduction.Heevenbegantonoticeindividualtreesandindividualbirds. Finallyhereturnedhome.Butunfortunatelyhisimprovementwasonlytemporary.Soonhewasanormalbusinessmanagainworriedabouthispropertyhisprofitshissavingshisadvancementinatechnologicalsocietyandthingsingeneral. Inthelastparagraphthewordtemporarymeans
PassageFive Thecomputerisawonderfulmachine.Itisthemostimportantinventionsincethetypeofengineusedincars.Todayithasthegreatesteffectonscienceindustryandbusinessbutitisbeingusedmoreineducationandmedicine.Bytheendofthiscenturyitwilltouchthelivesofeveryoneevenpeopleindistantvillages.Itisarevolutionaryinvention. TheoldestkindofcomputeristheabacususedinChinasincethesixthcentury.Intheseventeenthcenturyanaddingmachinewasinventedbutthefirstlargemoderncomputerwasbuiltin1973.Afewyearslateracomputercoulddo5000additionspersecond.Nowthecomputationsaresofastthattheyaremeasuredinnanoseconds. Todaymostcomputersarestored-programcomputersthatistheyhaveamemory.Theyaregettingsmallerandsmallerandcomputingfasterandfaster.Eveninalargecomputerthepartthatdoestheactualcomputingisaboutthesizeoftheendofafinger. Computerscandoallkindsofwork.Whensomeonebuyssomethinginadepartmentstoreinformationaboutthesalegoesintoacomputer.Ascientistcantalktothecomputerabouttherocksandthecomputeranswersthequestions.Adoctorcantalktothecomputerandexplainswhatiswrongwithapatient.Ifthedoctoraskswhythecomputergoesthroughitsstoredinformationandexplainsexactlywhy. Whenearlyhumansbeganfanningitwasarevolutionarychangeinhumanlife.Itwashundredsofthousandsofyearslaterthatpeopledevelopedawritingsystem.Inlessthanfiftyyearspeoplehavedevelopedcomputersthatcandomostofthethingshumanscando.Thiscouldbeafrighteningdevelopment. Thepartofacomputerthatisthesizeoftheendofafinger.
PassageThree Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityofthesun.Thesunheatsandfeedsmankind.Eachyearitprovidesmenwithtwohundredmilliontonsofgrainandnearlytenmilliontonsofwood. Coaloilnaturalgasandallotherfuelsarestored-upenergyfromthesun.Somewascollectedbythisseason’splantsascarboncompounds.Somewasstoredbyplantsandtreesagesago. Evenwaterpowerderivesfromthesun.Waterturnedintovaporbythesunfallsasrain.Itcoursesdownthemountainsandisconvertedtoelectricpower. Lighttransmitsonlytheenergythatcomesfromthesun’souterlayersandmuchofthisenergythatisdirectedtowardtheearthneverarrives.Aboutnine-tenthsofitisabsorbedbytheatmosphereoftheearth.Infact;theearthitselfgetsonlyonehalf-billionthofthesun’sentireoutputofradiantenergy. Thelargestpartoftheradiantenergydirectedtowardtheearthis
A.ButIhavetowork. B.Coffeeplease. C.Fineandyou D.MaybeJoan E.Thanks. F.Goodluck. G.Youtoo. H.Yeshereyouare. Lisa:Can’tanybodytellmetheanswertothismathproblemJohn:______
PassageThree Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityofthesun.Thesunheatsandfeedsmankind.Eachyearitprovidesmenwithtwohundredmilliontonsofgrainandnearlytenmilliontonsofwood. Coaloilnaturalgasandallotherfuelsarestored-upenergyfromthesun.Somewascollectedbythisseason’splantsascarboncompounds.Somewasstoredbyplantsandtreesagesago. Evenwaterpowerderivesfromthesun.Waterturnedintovaporbythesunfallsasrain.Itcoursesdownthemountainsandisconvertedtoelectricpower. Lighttransmitsonlytheenergythatcomesfromthesun’souterlayersandmuchofthisenergythatisdirectedtowardtheearthneverarrives.Aboutnine-tenthsofitisabsorbedbytheatmosphereoftheearth.Infact;theearthitselfgetsonlyonehalf-billionthofthesun’sentireoutputofradiantenergy. Radiantenergyisstoredascarboncompoundsby
A．ought B．doubt C．thought D．bought
Manyayoungscientist______engagedintheresearchwork.
NowadayspeopleworklongerhoursthantheyusedtobutaretheyreallyworkingharderthaneverbeforeApparentlymanypeoplebelievethatthemoretimeapersonspendsonwork21sheorheaccomplishes.Howevertheconnectionbetweentimeand22isnotalways23.Infactmanystudiesindicatethatafteracertainpointanyone’sproductivityandcreativitybeginto24.Furthermoreitisnotalwayseasyforindividualsto25thattheirperformanceisfallingoff. Partoftheproblemisunderstandable.When26evaluateemployeestheyoftenconsidertheamountoftimespentonthejob27performance.Employeesknowthis.Consequentlytheyworklongerhoursand28lessvacationtimethantheydidseveralyearsago.Althoughmanyworkingpeoplecandotheirjobeffectivelyduringa2940-hour-workweektheyfeeltheyhavetospendmoretimeonthejobafternormalworkinghourssothattheycanletthepeoplewhocan30themseeit. 29
PassageOne Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolIhavetaughtinhaseverignoredspellingorconsidereditunimportantasabasicskill.Therearehowevervastlydifferentideasabouthowtoteachitorhowmuchpriorityitmustbegivenovergenerallanguagedevelopmentandwritingability.Theproblemishowtoencourageachildtoexpresshimselffreelyandconfidentlyinwritingwithoutholdinghimbackwiththecomplexitiesofspelling. Ifspellingbecomestheonlyfocalpointof.histeacher’sinterestclearlyabrightchildwillbelikelyto"playsafe".Hewilltendtowriteonlywordswithinhisspellingrangechoosingtoavoidadventurouslanguage.That’swhyteachersoftenencouragetheearlyuseofdictionariesandpayattentiontocontentratherthantechnicalability. Iwasonceshockedtoreadonthebottomofasensitivepieceofwritingaboutapersonalexperience:"Thisworkisterrible!Thereare’fartoomanyspellingerrorsandyourwritingisillegible难以辨认的."Itmayhavebeenasharpcriticismofthepupil’stechnicalabilitiesinwritingbutitwasalsoasadreflectionontheteacherwhohadomittedtoreadtheessaywhichcontainedsomebeautifulexpressionsofthechild’sdeepfeelings.Theteacherwasnotwrongtodrawattentiontotheerrorsbutifhis.prioritieshadcentredonthechild’sideaanexpressionofhisdisappointmentwiththepresentationwouldhavegiventhepupilmoremotivationtoseekimprovement. Thewriterseemstothinkthattheteacher'sjudgementonthatsensitivepieceofwritingis
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytoremembersolutionfromthelasttimetheyhada21problem.Theyoftenaccepttheopinionorideasofotherpeople.Othertimestheybegintoactwithout22theytrytofindasolutionbytrialanderror.Howeverwhenallofthesemethods23thepersonwithaproblemhastostartanalysing.Thereareseveralstagesinanalysingaproblem. Firstthepersonmustrecognizethatthereisaproblem.ForexampleSam’sbicycleisbroken.Sammust24thatthereisaproblemwithhisbicycle.Nextthepersonmust25theproblem.Samcanrepairhisbicyclehemustknowwhyitdoesnotwork.Nowthepersonmustlookfor26thatwillmaketheproblemclearerandleadtopossiblesolutions.SupposeSamdecidesthathisbikedoesnotworkbecausethereissomethingwrongwiththebrakes.Atthistimehecanlookinhisbicyclerepairbookand27hisfriendsatthebikeshop.After28.theproblemthepersonshouldhaveseveralsuggestionsforapossiblesolution.Intheendonesuggestionseemstobethesolution29theproblem.Samforexamplesuddenlyseesthereisapieceofchewinggum口香糖stacktoabrake.Whathewilldoistocleanthebrake.Finallythesolutionis30.Samdoesitandfindshisbicycleworksperfectly.Inshorthehassolvedtheproblem. 22
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytoremembersolutionfromthelasttimetheyhada21problem.Theyoftenaccepttheopinionorideasofotherpeople.Othertimestheybegintoactwithout22theytrytofindasolutionbytrialanderror.Howeverwhenallofthesemethods23thepersonwithaproblemhastostartanalysing.Thereareseveralstagesinanalysingaproblem. Firstthepersonmustrecognizethatthereisaproblem.ForexampleSam’sbicycleisbroken.Sammust24thatthereisaproblemwithhisbicycle.Nextthepersonmust25theproblem.Samcanrepairhisbicyclehemustknowwhyitdoesnotwork.Nowthepersonmustlookfor26thatwillmaketheproblemclearerandleadtopossiblesolutions.SupposeSamdecidesthathisbikedoesnotworkbecausethereissomethingwrongwiththebrakes.Atthistimehecanlookinhisbicyclerepairbookand27hisfriendsatthebikeshop.After28.theproblemthepersonshouldhaveseveralsuggestionsforapossiblesolution.Intheendonesuggestionseemstobethesolution29theproblem.Samforexamplesuddenlyseesthereisapieceofchewinggum口香糖stacktoabrake.Whathewilldoistocleanthebrake.Finallythesolutionis30.Samdoesitandfindshisbicycleworksperfectly.Inshorthehassolvedtheproblem. 24
PassageFive Thecomputerisawonderfulmachine.Itisthemostimportantinventionsincethetypeofengineusedincars.Todayithasthegreatesteffectonscienceindustryandbusinessbutitisbeingusedmoreineducationandmedicine.Bytheendofthiscenturyitwilltouchthelivesofeveryoneevenpeopleindistantvillages.Itisarevolutionaryinvention. TheoldestkindofcomputeristheabacususedinChinasincethesixthcentury.Intheseventeenthcenturyanaddingmachinewasinventedbutthefirstlargemoderncomputerwasbuiltin1973.Afewyearslateracomputercoulddo5000additionspersecond.Nowthecomputationsaresofastthattheyaremeasuredinnanoseconds. Todaymostcomputersarestored-programcomputersthatistheyhaveamemory.Theyaregettingsmallerandsmallerandcomputingfasterandfaster.Eveninalargecomputerthepartthatdoestheactualcomputingisaboutthesizeoftheendofafinger. Computerscandoallkindsofwork.Whensomeonebuyssomethinginadepartmentstoreinformationaboutthesalegoesintoacomputer.Ascientistcantalktothecomputerabouttherocksandthecomputeranswersthequestions.Adoctorcantalktothecomputerandexplainswhatiswrongwithapatient.Ifthedoctoraskswhythecomputergoesthroughitsstoredinformationandexplainsexactlywhy. Whenearlyhumansbeganfanningitwasarevolutionarychangeinhumanlife.Itwashundredsofthousandsofyearslaterthatpeopledevelopedawritingsystem.Inlessthanfiftyyearspeoplehavedevelopedcomputersthatcandomostofthethingshumanscando.Thiscouldbeafrighteningdevelopment. Thecomputerwillsoonaffect
PassageOne Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolIhavetaughtinhaseverignoredspellingorconsidereditunimportantasabasicskill.Therearehowevervastlydifferentideasabouthowtoteachitorhowmuchpriorityitmustbegivenovergenerallanguagedevelopmentandwritingability.Theproblemishowtoencourageachildtoexpresshimselffreelyandconfidentlyinwritingwithoutholdinghimbackwiththecomplexitiesofspelling. Ifspellingbecomestheonlyfocalpointof.histeacher’sinterestclearlyabrightchildwillbelikelyto"playsafe".Hewilltendtowriteonlywordswithinhisspellingrangechoosingtoavoidadventurouslanguage.That’swhyteachersoftenencouragetheearlyuseofdictionariesandpayattentiontocontentratherthantechnicalability. Iwasonceshockedtoreadonthebottomofasensitivepieceofwritingaboutapersonalexperience:"Thisworkisterrible!Thereare’fartoomanyspellingerrorsandyourwritingisillegible难以辨认的."Itmayhavebeenasharpcriticismofthepupil’stechnicalabilitiesinwritingbutitwasalsoasadreflectionontheteacherwhohadomittedtoreadtheessaywhichcontainedsomebeautifulexpressionsofthechild’sdeepfeelings.Theteacherwasnotwrongtodrawattentiontotheerrorsbutifhis.prioritieshadcentredonthechild’sideaanexpressionofhisdisappointmentwiththepresentationwouldhavegiventhepupilmoremotivationtoseekimprovement. Theexpressionplaysafeprobablymeans
______atsuchatimehisworkattractedmuchattention.
学生的职责TheDutiesofStudents
Thefarmerfeltthe______ofthebadweatherforyears.
Athiefbroke______whenIwasleavingformyoffice.
Gobacktoyourroomandleaveme______.
PassageOne Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolIhavetaughtinhaseverignoredspellingorconsidereditunimportantasabasicskill.Therearehowevervastlydifferentideasabouthowtoteachitorhowmuchpriorityitmustbegivenovergenerallanguagedevelopmentandwritingability.Theproblemishowtoencourageachildtoexpresshimselffreelyandconfidentlyinwritingwithoutholdinghimbackwiththecomplexitiesofspelling. Ifspellingbecomestheonlyfocalpointof.histeacher’sinterestclearlyabrightchildwillbelikelyto"playsafe".Hewilltendtowriteonlywordswithinhisspellingrangechoosingtoavoidadventurouslanguage.That’swhyteachersoftenencouragetheearlyuseofdictionariesandpayattentiontocontentratherthantechnicalability. Iwasonceshockedtoreadonthebottomofasensitivepieceofwritingaboutapersonalexperience:"Thisworkisterrible!Thereare’fartoomanyspellingerrorsandyourwritingisillegible难以辨认的."Itmayhavebeenasharpcriticismofthepupil’stechnicalabilitiesinwritingbutitwasalsoasadreflectionontheteacherwhohadomittedtoreadtheessaywhichcontainedsomebeautifulexpressionsofthechild’sdeepfeelings.Theteacherwasnotwrongtodrawattentiontotheerrorsbutifhis.prioritieshadcentredonthechild’sideaanexpressionofhisdisappointmentwiththepresentationwouldhavegiventhepupilmoremotivationtoseekimprovement. Teachersencouragetheuseofdictionariessothat
PassageFour Mr.Smithwasawealthyindustrialistbuthewasnotsatisfiedwithlife.Hedidnotsleepwellandhisfooddidnotagreewithhim.Thissituationlastedforsometime.Finallyafterseveralsleeplessnightshedecidedtoconsulthisdoctor.Thedoctoradvisedachangeofsurroundings."Goabroad"hesaid."ButI’mnotgoodatforeignlanguage"saidMr.Smith."Itdoesn’tmatter"saidthedoctor."Itwon’thurtyoutotalkalittleless.Goonavoyage.Takeplentyofexercise.Trytoreduceyourweight.Avoidrichfood." Mr.Smithwenttoswitzerland.HedidnotknowFrenchorGermanandhadtocommunicatethroughgestures.Heattendedaphysicaltrainingcourse.Theinstructormadehimbendhiskneesswinghisarmsstretchhisneckandshakehisheadrapidly.Hebadtolieonthegroundandraisehisrightandleftlegsalternately.Afteratimehismusclesgrewhardandfirm.Heforgotthefinancialcrisisandtheimportanceofraisingthelevelofproduction.Heevenbegantonoticeindividualtreesandindividualbirds. Finallyhereturnedhome.Butunfortunatelyhisimprovementwasonlytemporary.Soonhewasanormalbusinessmanagainworriedabouthispropertyhisprofitshissavingshisadvancementinatechnologicalsocietyandthingsingeneral. Inthesecondparagraphthewordgesturesmeans
Silveristhebestconductorofelectricitycopper______itclosely.
PassageTwo Havingnolanguageinfantscannotbetoldwhattheyneedtolearn.Yetbytheageofthreetheywillhavemasteredthebasicstructureoftheirnativelanguageandwillbewellontheirwaytocommunicativecompetence.Acquiringtheirlanguageisamostimpressiveintellectualfeat.Studentsofhowchildrenlearnlanguagegenerallyagreethatthemostremarkableaspectofthisfeatistherapidacquisitionofgrammar.Neverthelesstheabilityofchildrentoconformtogrammaticalrulesisonlyslightlymorewonderfulthantheirabilitytolearnwords.IthasbeenreckonedthattheaveragehighschoolgraduateintheUnitedStateshasareadingvocabularyof80000wordswhichincludesidiomaticexpressionsandpropernamesofpeopleandplaces.Thisvocabularymusthavebeenlearnedoveraperiodof16years.Fromthefiguresitcanbecalculatedthattheaveragechildlearnsatarateofabout13newwordsperday.Clearlyalearningprocessofgreatcomplexitygoesonarapidrateinchildren. Theunderlinedwordreckonedisclosestinmeaningtowhichofthefollowing
Hewasfound______onemonthafterhewasborn.
She______cryingveryhelpfultoexpresshersadness.
PassageThree Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityofthesun.Thesunheatsandfeedsmankind.Eachyearitprovidesmenwithtwohundredmilliontonsofgrainandnearlytenmilliontonsofwood. Coaloilnaturalgasandallotherfuelsarestored-upenergyfromthesun.Somewascollectedbythisseason’splantsascarboncompounds.Somewasstoredbyplantsandtreesagesago. Evenwaterpowerderivesfromthesun.Waterturnedintovaporbythesunfallsasrain.Itcoursesdownthemountainsandisconvertedtoelectricpower. Lighttransmitsonlytheenergythatcomesfromthesun’souterlayersandmuchofthisenergythatisdirectedtowardtheearthneverarrives.Aboutnine-tenthsofitisabsorbedbytheatmosphereoftheearth.Infact;theearthitselfgetsonlyonehalf-billionthofthesun’sentireoutputofradiantenergy. Formankindthesunisthesourceof
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