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1、Youshouldspendabout20minutesonthistask.ThetwographsshowthemainsourcesofenergyintheUSAinthe1980sandthe1990s.Writeareportforauniversitylecturerdescribingthechangeswhichoccurred.Writeatleast150words.modelanswer:Thetwographsshowthatoilwasthemajorenergysou
2、rceintheUSAinboth1980and1990andthatcoal,naturalgasandhydroelectricpowerremainedinmuchthesameproportions.Ontheotherhand,therewasadramaticriseinnuclearpower,whichdoubleditspercentageoverthetenyears.Oilsuppliedthelargestpercentageofenergy,althoughtheperc
3、entagedecreasedfrom42%in1980to33%in1990.Naturalgas,thesecondlargestsourcein1980at26%,decreaseditsshareveryslightlytoprovide25%ofAmerica’senergytenyearslater.Therewasnochangeinthepercentagesuppliedbyhydroelectricpowerwhichremainedat5%ofthetotalenergyus
4、ed.Nuclearpowerthegreatestchange:in1990itwas10%,twicethatofthe1980.Youshouldspendabout20minutesonthistask.Thegraphbelowshowsthedifferencesinwheatexportsoverthreedifferentareas.Writeareportforauniversitylecturerdescribingtheinformationshownbelow.Writea
5、tleast150words.modelanswer:Thethreegraphsofwheatexportseachshowaquitedifferentpatternbetween1985and1990.ExportsfromAustraliadeclinedoverthefive-yearperiod,whiletheCanadianmarketfluctuatedconsiderably,andtheEuropeanCommunityshowedanincrease.In1985,Aust
6、raliaexportedabout15millionsoftonnesofwheatandthefollowingyearthenumberincreasedbyonemilliontonnesto16million.Afterthat,however,therewasagradualdeclineuntil1989and1990whenitstabilisedatabout11milliontonnes.Overthesameperiod,theamountofCanadianexportsv
7、ariedgreatly.Itstartedat19milliontonnesin1985,reachedapeakin1988of24million,droppeddramaticallyin1989to14milliontonnesandthenclimbedbackto19millionin1990.SeventeenmilliontonneswereexportedfromtheEuropeanCommunityin1985,butthisdecreasedto14milliontonne
8、sin1986andthenroseto15millionin1987and1988beforeincreasingoncemoreto20millionin1990.Youshouldspendabout20minutesonthistask.ThetablebelowgivesinformationaboutFavoritePastimesindifferentcountries.Summarizetheinformationbyselectingandreportingthe
