托福阅读随着时间的推移而积累，除了理论，更注重实践经验。改进的方法，只有从定量变化到定性变化，才能逐渐改变。托福阅读的培训非常重要，培训材料是重点，选择正确的方向来计划和分析未来的进展。下面由新航道的沈阳托福培训小编为您解答！

　　托福阅读练习材料燃煤电厂

　　燃煤电厂

　　TheinventionoftheincandescentlightbulbbyThomasA.Edisonin187createdademandoracheap，readilyavailablefuelwithwhichtogeneratelargeamountsofelectricpower.Coalseemedtofitthebill,anditfueledtheearliestpowerstations.(whichweresetupattheendofthenineteenthcenturybyEdisonhimself).Asmorepowerplantswereconstructedthroughoutthecountry,therelianceoncoalincreasedthroughoutthecountry,therelianceoncoalincreased.

　　WorldWar,coal-firedpowerplantshadacombinedintheUnitedStateseachyear.In1986suchplantshadacombinedintingapacityof289，.Giventheuncertaintyinthefuturegrowthofnuclearpowerandinthesupplyofoilandnaturalgas,coal-选择题选择网络

　　Yet,inspiteofthefactthatcoalhaslongbeenasourceofelectricityandmayremainonformanyyears(coalepresabout80perstosils-fuelreserves),ithasactuallyneverbeenthemostdesirablefossilfuelforpowerplants.Coalcontainslessenergyperunitofweightthanweightthannaturalgasoroil;itisdifficulttotransport,anditisassociatedwithahostofenvironmentalissues,amongthemacidrain.Sinethelate1960sproblemsofemissioncontrolandwastedisposalhavesharplyreducedtheappealofcoal-firedpowerplants.Thecostofamelioratingtheseenvironmentproblemsalongwiththerisingcostofbuildingafacilityaslargeandcomplexasacoal-firedpowerplant,havealsomadesuchplantslessattractivefromapurelyeconomicperspective.

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