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ID:32760749
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页数:7页
时间:2019-02-15
《高中英语阅读理解专题训练(6)-高中课件精选》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、(广东专版每篇5小题)(第6套)第一节:阅读理解(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。A(words:332&211)Microwavesmaybegreatatwarmingupfood,butwhataboutwarmingpeople?Usingmicrowavestodirectlyheatownersofaroomwouldsavemuchoftheenergywastedbyheatingwallsandf
2、urniture.Anddespitepopularideasaboutmicrowaves,thistechniquewouldbesafe,accordingtoCharlesR.BurlieroftheMicrowaveResearchCenterinMarlborough,NewHampshire.Low-powermicrowavesonlypenetrate(贯穿)theskin(low-powermicrowavepenetrationinahamisabout0.2inches,for
3、example)andwithnonegativeeffects.Totestthisidea,Bufflersubjectedhimselftomicrowavesinaspecialroomusingastandard500-watt,2459MHzmagnetron(磁控管).Hefoundthatapersonwillstarttofeelwarmthatabout20milliwattspersquarecentimeter(mw・/sq.cm.);asatisfactoryfeelingo
4、fwarmthoccursbetween35and50mw・/sq.cm.Bycomparison,apersonstandinginnoondaysummersunfeelstheamountof85mw./sq.cm.Andafrozenmeatpieinyourmicrowaveovenreceivesabout1000mw./sq.cm.Inhousesofthefuture,eachroomcouldbeprovidedwithitsownmagnetron,saysBuffle匚Wheny
5、ousteppedintothelivingroom,forexample,amotiondetector(运动感应器)wouldturnonthemagnetron,fillingtheroomwithlow-powermicrowaves.Inthesamewaythatamicrowaveovenheatsupahamburger,butnottheplateit'son,youwouldfeelwarmthfromthemicrowaveswithoutchangingthetemperatu
6、reofyourcoffeetable.(Youcould,however,makeyourfavoriteeasychairevenmorecomfortablebytreatingitwitharadiation-absorbingchemical.)Whileitmightbesometimebeforehomeownersarecomfortableenoughwiththeideatosetupwhole-bodymicrowaveheatersinhouses,Bufflersaysmic
7、rowavesmayattractlivestock(家畜)farmers8、technique.D.Themagnetron.42.AccordingtoParagraph2,whichofthefollowingdoesnotdescribethecharacteristicsofamicrowaveheater?A.Itdirectlyheatspeopleinaroom・B.Itheatswallsandfurnitureinaroom.C.Itissafe.D.Itsavesenergy.43.Thetestconduc
8、technique.D.Themagnetron.42.AccordingtoParagraph2,whichofthefollowingdoesnotdescribethecharacteristicsofamicrowaveheater?A.Itdirectlyheatspeopleinaroom・B.Itheatswallsandfurnitureinaroom.C.Itissafe.D.Itsavesenergy.43.Thetestconduc
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