2017年12月英语六级阅读模拟试题及详解答案.docx

书山有路勤为径，学海无涯苦作舟

2017年12月英语六级阅读模拟试题及详解答案

RenewableEnergy

?Inthepastcentury,ithasbeenseenthattheconsumptionofnon-

renewablesourcesofenergyhascausedmoreenvironmentaldamagethan

anyotherhumanactivity.Electricitygeneratedfromfossilfuelssuchascoal

andcrudeoilhasledtohighconcentrationsofharmfulgasesinthe

atmosphere.Thishasinturnledtomanyproblemsbeingfacedtodaysuchas

ozonedepletionandglobalwarming.Vehicularpollutionhasalsobeena

majorproblem.

?Therefore,alternativesourcesofenergyhavebecomeveryimportant

andrelevanttotoday#39;sworld.Thesesources,suchasthesunand

wind,canneverbeexhaustedandthereforearccalledrenewable.Theycause

lessemissionandareavailablelocally.Theirusecan.toalargeextent,reduce

chemical,radioactive,andthermalpollution.Theystandoutasaviablesource

ofcleanandlimitlessenergy.Thesearealsoknownasnon-conventional

sourcesofenergy.Mostoftherenewablesourcesofenergyarefairfynon-

pollutingandconsideredcleanthoughbiomass,arenewablesource,isamajor

polluterindoors.

?SolarEnergy

?Solarenergyisthemostreadilyavailablesourceofenergy.Itdoesnot

belongtoanybodyandis,therefore,free.Itisalsothemostimportantofthe

non-conventionalsourcesofenergybecauseitisnon-polluting

and,therefore.helpsinlesseningthegreenhouseeffect.

?Solarenergyhasbeenusedsinceprehistorictimes.butinamost

primitivemanner.Before1970,someresearchanddevelopmentwascarried

outinafewcountriestoexploitsolarenergymoreefficiently,butmostofthis

workremainedmainlyacademic.Afterthedramaticriseinoilpricesinthe

1970s,severalcountriesbegantoformulateextensiveresearchand

developmentprogrammestoexploitsolarenergy.

?Whenwehangoutourclothestodryinthesun,weusetheenergyof

thesun.Inthesameway,solarpanelsabsorbtheenergyofthesuntoprovide

heatforcookingandforheatingwa