Ifthesunhasenoughpowertowarmandlightthewholeearthitmusthaveenoughpowertodootherthingstoo.Canweusethesun'sabundantenergytosupplyelectricityoratleasttoperformthefunctionswhichelectricityorothertype

　　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.