Ifthesunhasenoughpowertowarmandlightthewholeearthitmusthaveenoughpowertodootherthingstoo.Canweusethesun'sabundantenergytosupplyelectricityoratleasttoperformthefunctionswhichelectricityorothertypesofpowerusuallyperform?Theanswerisyes.
Forexamplepeoplehaveformanyyearsbeenusingthereflectedheatofthesuntocook.
Solarcookershavebeenbuiltwithseveralcurved(弯曲)mirrorsreflectingthesunandfocusingitsheatonthecookingcomponent.Thisequipmentcanbeusedjustlikeagasorelectricstove;itismoreexpensivetomakebutitdoesnotneedanyfuelandsocostsnothingtouse.Anotherpossibilityofusingsolarenergyisinhouseheating.
Theformofenergyweusemostiselectricityandeverydaymoreisneeded.Butelectricityhastobemadetooandtomakeit arerequired--oilgasandnowadaysevenuranium(铀).
Thequestionwhichworrieseveryonetodayis:howlongwillthesefuelslast?Nobodyknowsitforsurebutmostexpertsthinkitwillsoonbedifficulttoobtainsufficientelectricityfromthesesources.Itispossiblethatthesuncanmakeacontributionheretoo.
Solarpowerhasalreadybeenusedtoproduceterrificheat.InSouthernFranceasolarfurnace(hugestove)hasbeenbuiltwheretemperaturesreachmorethan3000℃.Thisfurnaceisonlyusedforexperimentsatpresentbutcouldbeusedtoproducesteamforapowerstation.
1.Whatisthemainideaofthepassage?(Pleaseanswerwithin10words.)
2.Whichsentenceinthepassagecanbereplacedbythefollowingone?
Thesuncanalsomakeitpossibleforustogetalargequantityofelectricityinsteadoffromotherfuels.
3.Pleasefillintheblankinthethirdparagraphwithproperwordsorphrasestocompletethesentence.(Pleaseanswerwithin10words.)
4.Whichcanlastlongertheordinaryfuelsorthesolarenergy?Whatshallwedotohaveenoughelectricity?(Pleaseanswerwithin30words.) 5.TranslatetheunderlinedsentenceinthesecondparagraphintoChinese.