英语阅读中考真题二十篇(初中英语拓展阅读3)
暑假过后,新初三生们迎来了初中最重要的一年——初三。为方便年中考考生及家长查询相关信息,中考频道特别搜集汇总了中考英语知识点以供参考:
SkyscrapersandEnvironment
Inthelate's,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskyscraperswerewidelycriticized.Ecologistspointedoutthataclusteroftallbuildingsinacityoftenoverburdenspublictransportationandparkinglotcapacities.
Skyscrapersarealsolavishconsumers,andwasters,ofelectricpower.Inonerecentyear,theadditionof17millionsquarefeetofskyscraperofficespaceinNewYorkCityraisedthepeakdailydemandforelectricityby120,000kilowatts-enoughtosupplytheentirecityofAlbany,NewYork,foraday.
Glass-walledskyscraperscanbeespeciallywasteful.Theheatloss(orgain)throughawallofhalf-inchplateglassismorethantentimesthatthroughatypicalmasonrywallfilledwithinsulationboard.Tolessenthestrainonheatingandair-conditioningequipment,buildersofskyscrapershavebeguntousedouble-glazedpanelsofglass,andreflectiveglassescoatedwithsilverorgoldmirrorfilmsthatreduceglareaswellasheatgain.However,mirror-walledskyscrapersraisethetemperatureofthesurroundingairandaffectneighboringbuildings.
Skyscrapersputaseverestrainonacity'ssanitationfacilities,too.Iffullyoccupied,thetwoWorldTradeCentertowersinNewYorkCitywouldalonegenerate2.25milliongallonsofrawsewageeachyear-asmuchasacitythesizeofStanford,Connecticut,whichhasapopulationofmorethan109,000.
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