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Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimportantquestionsthatmanypeopleareaskingtoday.Somepeoplethinkthatmenmightbeabletosolvebothproblemsatt
更新时间: 2025-08-28 19:54:58
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问题描述:

Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?

Thesearetwoimportantquestionsthatmanypeopleareaskingtoday.Somepeoplethinkthatmenmightbeabletosolvebothproblemsatthesametime.Theysuggestusinggarbageasanenergysource.

Foralongtimepeopleburiedgarbageordumpeditonemptyland.Nowemptylandisscarce.Butmoreandmoregarbageisproducedeachyear.Butgarbagecanbeagoodfueltouse.Thethingsingarbagedonotlooklikecoalpetroleumornaturalgas;buttheyarechemicallysimilartothesefossilfuels.Asweuseupourfossil-fuelsupplieswemightbeabletousegarbageasanenergysource.

Burninggarbageisnotanewidea.SomecitiesinEuropeandtheUnitedStateshavebeenburninggarbageforyears.Theheatthatisproducedbyburninggarbageisusedtoboilwater.Thesteamthatisproducedisusedtomakeelectricityortoheatnearbybuildings.InParisFrancesomepowerplantsburnalmost2millionmetrictonsofthecity'sgarbageeachyear.Theamountofenergyproducedisaboutthesameastheworldproducedbyburningalmostahalfmillionbarrelsofoil!

Butthereareproblemsinusinggarbageasafuel.Garbagethatburnseasilysuchasfoodscrapsandpapermustbeseparatedfrommetalsglassandothermaterialsthatdonotburneasily.Thisseparationprocessisnormallycostly.Anotherproblemisthatburninggarbagecanpollutetheair.

Ourfossilfuelsuppliesarelimited.Burninggarbagemightbeonekindofenergysourcethatwecanusetohelpmeetourenergyneeds.Thismethodcouldalsoreducetheamountofgarbagepilingupontheearth.

53.Whattwoproblemscanbesolvedbyburninggarbage?

A.Theshortageofenergy;Airpollution.

B.Theshortageofenergy;theshortageofemptylandforholdinggarbage.

C.Airpollution;theshortageofemptylandforholdinggarbage.

D.Airpollution;theshortageoffossilfuel.

54.WhichofthefollowingisNOTaresultofburninggarbage?

A.Theheatproducedisusedtoboilwater.

B.Thesteamproducedisusedtomakeelectricity.

C.Thegarbageburnedisturnedintofossilfuels.

D.Thesteamproducedisusedtoheatbuildings.

55.Accordin

黄敏桐回答:
  【小题1】B   【小题2】C   【小题3】D   【小题4】C
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