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1、英语必修2译林牛津版Unit2优质教案（第7课时）Period7GrammarandusageIITeachingAims:1.Newwordsandexpressions:note,interview,schedule,surprisingly*getinto.Theywouldreachtheairportanhourlater.Iwasgoingtoleave・Hewasseeingherlater.ThejourneythatwastochangeToby'slifestarted...Colinwasabouttoget
2、offthecamel...2.EnablethestudentstouseFutureinthePastcorrectly.3.HelpthestudentslearnhowtouseFutureinthePastcorrectly・TeachingImportantandDifficultPointsLearntheusageFutureinthePast・TeachingMethodsPractice;task-basedactivitiesTeachingAidsAtaperecorderandthemultimedia・
3、教师看高考阅读理解、专题训练(和)、说明文的阅读(2)阅读下列短文，然后按要求完成读写任务Microwavesmaybegreatatwarmingupfood,butwhataboutwarmingpeople?Usingmicrowavestodirectlyheatownersofaroomwouldsavemuchoftheenergywastedbyheatingwallsandfurniture.Anddespitepopularideasaboutmicrowaves,thistechniquewouldbesafe
4、,accordingtoCharlesR.BurlieroftheMicrowaveResearchCenterinMarlborough,NewHampshire.Low-powermicrowavesonlypenetrate(贯穿)theskin(low-powermicrowavepenetrationinahamisabout0.2inches,forexample)andwithnonegativeeffects.Totestthisidea,Bufflersubjectedhimselftomicrowavesina
5、specialroomusingastandard500-watt,2,459MHzmagnetron(磁控管).Hefoundthatapersonwillstarttofeelwarmthatabout20milliwattspersquarecentimeter(mw./sq.cm.)；asatisfactoryfeelingofwarmthoccursbetween35and50mw./sq.cm.Bycomparison,apersonstandinginnoondaysummersunfeelstheamountof8
6、5mw./sq.cm.Andafrozenmeatpieinyourmicrowaveovenreceivesabout1,000mw./sq.cm.Inhousesofthefuture,eachroomcouldbeprovidedwithitsownmagnetron,saysBuffle匚Whenyousteppedintothelivingroom,forexample,amotiondetector（运动/惑丿应器）wouldturnonthemagnetron,fillingtheroomwithlow-powerm
7、icrowaves.Inthesamewaythatamicrowaveovenheatsupahamburger,butnottheplateit'son,youwouldfeelwarmthfromthemicrowaveswithoutchangingthetemperatureofyourcoffeetable.Youcould,however,makeyourfavoriteeasychairevenmorecomfortablebytreatingitwitharadiation—absorbingchemical.W
8、hileitmightbesometimebeforehomeownersarecomfortableenoughwiththeideatosetupwhole-bodymicrowaveheatersinhouses,Bufflersaysmic
