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1、PASSAGEASinceabout1800,nearthebeginningoftheIndustrialRevolution,coal,petroleum,andgashavebeenusedatarapidlyincreasingrate.Thesupplyofthesefuelsislimited,andelectricpowerisveryscarceinmanyplaces.Somescientistsbelievesolarenergyistheonlysourcewhichcan
2、meettheworlds’enormousneedforpower.Greatprogresshadbeenmadeinharnessingthesun.Notonlyisthesunnowusedincooking,butitalsosuppliespowerforsuchthingsasbeaconlightsforshipsandairplanes.Itoperatestelephonelines,portableradios,electricclocks,hearingaids,and
3、evencommunicationssatellites.SomehomesandofficebuildingsintheUnitedStatesarenowbeingheatedwithsolarenergy.Thethreemostsignificanttypesofsolarequipmentsofararethefurnace,thestill,andthecell.Solarfurnacesheatwaterorair,whichisthencirculatedthroughabuil
4、dingtomakeitcomfortable.Solarstillsareespeciallyimportantbecausetheycanprovidefreshwateratarelativelycheaprate.Saltcanbeeasilyremovedfromseawaterwithasolarstill.Themosthighlydevelopedisthesolarcell.Somecellsaresoeffectivethattheycanturn16percentofthe
5、energytheyreceivefromthesunintoelectricenergy.Oneofthecell’sbiggestadvantagesisthatitcanbemadeeithersmallenoughtocarryorlargeenoughtoproduceacurrentthatcanrunanautomobile.Besides,ithasaverylonglife.Itisstilltooexpensivefortheaverageconsumer.Butwhenwa
6、ysarediscoveredtoproduceitmorecheaply,wecanexpectitsusetobewide-spread.PASSAGEBManytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualoronsocietyasthemajorcontributinginfluence.Theoriescenteringont
7、heindividualsuggestthatchildrenengageincriminalbehaviorbecausetheywerenotsufficientlypenalizedforpreviousmisdeedsorthattheyhavelearnedcriminalbehaviorthroughinteractionwithothers.Theoriesfocusingontheroleofsocietysuggestthatchildrencommitcrimesinresp
8、onsetotheirfailuretoriseabovetheirsocioeconomicstatusorasarejectionofmiddle-classvalues.Mosttheoriesofjuveniledelinquencyhavefocusedonchildrenfromdisadvantagedfamilies,ignoringthefactthatchildrenfromwealthyhomesalsocommitcrimes.Thelattermaycommitcrim
