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1、根据本节教材用实验和猜测相结合的方法来说明生命起源的特点，教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。关于机遇和挑战的英语演讲稿 First,Iwouldliketoknow,whatdoesyourdestinyofferyou?Happiness,wisdom,astrongbodyorsomethingelse.IfIhadaskedthisquestiontopresidentNixon,hewouldprobablyhadsaid,”Ourdestinyoffersnotthecupofd
2、espair,butthechaliceofopportunity.” Needlesstosay,oneofthebiggestopportunitiesgiventoChinaistheXXOlympicGames.Tillnow,wehaveusedtwoseventhsofthepreparationtime.Howmuchchangeshaveyouseen?Newroads,newsubwaylines,public-exercisingequipmentswithbeautifulcolors,largeb
3、locksofgrassfields,andalsolotsofmoderngymswhichareunderconstruction. Otherthanthose,thereareevenmoregoodeffectsbroughttousbytheOlympicGamesthatcannotbeseendirectly.Forexample,moreandmorepeoplewillgettoknowChina.I’msurethemysteriousChineseculturewillattractthemstr
4、ongly.Andthegameswillalsodogoodtotheeconomyandenvironment,foritisgainingtheattentionofforeigninvestorsandthe意大利医生雷地证明腐肉不能生蛆的实验投影片，巴思德的“鹅颈瓶实验”投影片，原始地球的投影片，米勒实验的投影片。根据本节教材用实验和猜测相结合的方法来说明生命起源的特点，教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。awarenessofenvironmentalprotectionisbei
5、ngstrengthened.Whatismore,OlympicGamesgiveauniqueopportunitytoinspireandeducateanewgenerationofChineseyouthwiththeOlympicvaluesandtheOlympicspirit.Nowthatwehaveseensomanyadvances,couldyouevenimagineuslosingtheholdingrights? I’vealreadysaidalotabouttheOlympicsandC
6、hina.ButIthinkeveryoneshouldusesometimetothinkofthisquestion,”DoestheOlympicGameshaveanyspecialmeaningtoyou?” Forus,ImeantheChineseyouth,XXOlympicGamesisatremendousgift.Becausewhatwearewaitingforistodosomethingsignificantasrepayingthelovegiventous.Thesocietyisjus
7、tlikeaship,andinourdreamsthecaptainiswavinghishandandsaying”Hey!Comehereandtakethehelm!”Howcharminghisvoiceis,butwehaveneverheardofitinourtruelife.Thismorning,however,whenwewakeup,wewillseetheOlympicGameswwavingitshand.Afterchewing,mostofuswillhaveatleastoneplanab
8、outwhattodofortheOlympicGames.Andmineistobea“comforter”----thatissomeonewhowillgivecomforttoothers.意大利医生雷地证明腐肉不能生蛆的实验投影片，巴思德的“鹅颈瓶实验”投影片，原始地球的投影片，米勒实验的投影
