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1、Unit20NewFrontiersWarm-upTeachingaimsI.wordsandphrases：frontiertelescopeatommicroscopeastronomybacteriaradiumsolarcrewpanelinstitutecomputesenseimpactethicalradioactivepoloniumseminarlife-sizedscreenhandybiochemistrytheoreticallyrobotdatabasemeanwhilesourceexplorationb
2、arbershopartificialintelligence,lightyear,searchengine,solarsystem,takeover,carryout,dataprocessing,theInternationalSpaceStation,clickinto,intermsof,II.listeninganddiscussionaboutsomethingofscienceIII.toreadthetextandstudythelanguagepointsTeachingtimeTwoperiodsTeaching
3、processStep1RevisionStep2newwordslearning1.asksomestudentstoreadthenewwordsfirstandcorrecttheirpronunciation2.playthetapeandhavethemreadafterthetape3.givethemafewminutestoreadthenewwordsfreely,tellthemiftheycan’treadthewords,encoreagethemtoasktheteacher.Step3Warm-up1.R
4、eadunitobjectives,andaskthestudentstotellusthemeanings.2.Exercise1a)letthestudentsreadthewordsandthenmatchthebranchesofsciencewiththepictures.b)todiscussthepictureswiththeclass3.Exercise2a)letthestudentsreadtheKeyWordsandmakesurethattheyreallyunderstandthemeaningsofthe
5、KeyWords.b)studentsdotheexerciseindividually,andthenchecktheiranswers4.Exercise3a)makesuretheclassknowwhattodo.Thenplaythetapetwice,asksomestudentstosaytheiranswerstotheclass.5.Exercise4a)readthequestionsfirstb)havethestudentsworkinpairsanddiscussthequestionsstep4Readi
6、ng1.Beforeyoustarta)readtheexercise1andaskthestudentsiftheyknowthephrases’meaning.Andgivethemafewminutestodiscusstheanswersb)checktheiranswersandaskthemtogivereasonsfortheiranswers.2.Readtolearna) askthestudentslookatexercise2,andthenplaythecassettetwice.b) givet
7、hemtenminutestoreadthetextandfillthetable.c) checktheirsanswers3.Languagepointsa) lookinto向...的里面看,窥视;浏览;观察,调查e.g.:Themayorpromisedtolookintowhethertheclashwasdesigned,oritjusthappenedbyaccident.市长答应调查这次冲突是预先计划好的,还是偶然发生的。Helookedthroughanumberofjournalsbeforehest
8、artedtheresearchproject.他在进行该项研究课题前查阅了许多期刊。b) hundredsof好几百,许许多多c) communicatewith通话,通信;［英］（房间等）互通tocommunicate
