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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。全国大学生英语演讲稿经典范文 facingthisaudienceonthestage,ihavetheexcitingfeelingofparticipatinginthemarchofhistory,forwhatwearefacingtodayismorethanamerecompetitionorcontest.itisanassemblyofsomeofchina’smosttalentedandmot
2、ivatedpeople,representativesofayoungergenerationthatarepreparingthemselvesforthecomingofanewcentury. i’mgratefulthati’vebeengiventhisopportunity,atsuchahistoricmoment,tostandhereasaspokesmanofmygenerationandtotakeaseriouslookbackatthepast15years,acrucialperiodforeveryon
3、eofusandforthisnationaswell. thoughitisonlywithinmypowertotellaboutmypersonalexperience,andonlyatinyfragmentofitatthat,itstillrepresents,ibelieve,therootofaspiritwhichhasbeenessentialtomeandtoallthepeoplebredbythepast15years. inmyelementaryyears,therewasalittlegirlinth
4、eclasswhoworkedveryhardbutsomehowcouldneverdosatisfactorilyinherlessons.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。 theteacheraskedmetohelpher,anditwasobviousthatsheexpectedalotfromme.butasayoungb
5、oy,restless,thoughtless,ialwaystriedtoevadehersoastogetmoretimetoenjoymyself. onedaybeforethefinalexam,shecameuptomeandsaid,couldyoupleaseexplainthistome?iwantverymuchtodobetterthistime.istartedexplaining,andfinishedinahurry.pretendingnottonoticeherstillconfusedeyes,ira
6、noffquickly.natsurprisingly,sheagaindidverybadlyintheexam.andtwomonthslater,atthebeginningofthenewsemester,wordcameofherdeathofbloodcancer.nooneeverknewaboutthelittletaskifailedtofulfill,buticouldn’tforgivemyself.isimplycouldn’tforgethereyes,whichseemtobeasking,whydidn’t
7、youdoalittlemoretohelpme,whenitwassoeasyforyou?whydidn’tyouunderstandalittlebetterthetrustplacedinyou,sothatiwouldnothavetoleavethisworldinsuchpainandregret? iwasabouteightornineyearsoldatthattime,butinawayitwastheverystartingpointofmylife,foribegantounderstandthewordre
8、sponsibilityand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
