模塊8unit2the-return-of-the-dinosaurs市公開課一等獎省賽課微課金獎

Unit2cloningusinglanguageTheReturnoftheDinosaurs?1/262/26Pleaseenjoysomepicturesaboutdinosaurs.3/26霸王龍tyrannosaurus4/26劍龍stegosaurs5/26角龍ceratopsids6/26雷龍brontosaurus7/26翼龍pterodactyl8/262.Doyoulikedinosaurs?Canyouseetheminourreallife?Why?Warmingup(4ms)9/263.Doyouthinkitispossibletoclonedinosaurs?

Warmingup(4ms)10/26Readthetext,thentellthefollowingsentencesaretrueorfalse.(Studentscandiscussinpairs.)Scientistsarestillexperimentingwithcloningmammalsbecausetheythinkitcanmakemoney.Theanimalsthathavedisappearedfromtheearth,likedinosaurs,canbebroughtbacktolifethroughcloning.Ifwecancloneanyextinctanimals,weshouldletthemliveinazoo.FFFReading--Iscanning(5ms)11/26GivesomereasonswhyitiseitherimpossibleorunsuitabletocloneextinctanimalsReason1:Reason2:Reason3:YouneedperfectDNTThereisnotenoughdiversityforclonedanimalstoovercomenewdiseases.Itwouldbeunfairtocloneanyextinctanimalsiftheywouldhavetoliveinazoo.12/26AdvantageofdiversityDisadvantageofdiversityDiversityinagroupofclonedanimalsIfthereisanewillnesssomeoftheseanimalsmaydie,butotherswillsurviveandpassedontheabilitytoresistthatdiseasetotheirchildren.Theywouldallhavethesamearrangementofgenesandsotheymightalldieofthesamedisease.13/26Reading--IIDetailreading(6ms)Readthetext,thenanswerthefollowingquestions.(Studentscandiscussinpairs.)Whyshould’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?14/26Whyshould’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?

Therewillnotbeenoughgeneticvariation(遺傳變異)inthegrouptobeabletoresistnewillnesses.15/262.Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?

Itisnotagoodideatocloneananimalthatwouldhavetoliveinazoobecauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.16/263.Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?

TheDNAofanimalsmorethan10,000yearsoldisnotsuitableforcloning,foritcan’tsurvivesolong.17/26ThepopularityofthefilmJurassicPark,inwhichascientistclonesseveraldifferentkindsofextinctdinosaurs,proveshowinterestedordinarypeopleareinthesubject.

長句難句18/26電影《侏羅紀(jì)公園》歡迎證實了普通人對這一話題是多么感興趣,在該電影中一位科學(xué)家克隆了幾個不一樣恐龍。

inwhich引導(dǎo)定語從句,how引導(dǎo)賓語從句。19/262.Fromtimetotimepeoplesuggestthattheanimalsthathavedisappearedfromtheearth,likedinosaurs,canpossiblybebroughtbacktolifethroughcloning.fromtimetotime有時,間或,偶然,=occasionally,nowandthen。人們時常構(gòu)想從地球上消失動物,比如恐龍,有可能經(jīng)過克隆技術(shù)使它們復(fù)活。20/263.Itisuselesstocloneananimalifthereisnotenoughdiversityinthegroupforittoovercomeillnesses.當(dāng)動詞不定式、動名詞或從句作主語時,通常把它們放在謂語之后,而用it作句子形式主語。該群中假如沒有足夠多樣性使它克服疾病,克隆動物就沒有用。21/264.Diversityinagroupmeanshavinganimalswiththeirgenesarrangedindifferentways.

withtheirgenesarrangedindifferentways作定語,indifferentways以不一樣方式。群中多樣性指是擁有基因排列方式不一樣動物。22/265....butotherswillsurviveandpassontheabilitytoresistthatdiseasetotheirchildren.

resist作及物動詞主要有三個義項:

抵抗,反抗;抵擋,預(yù)防;(與cannot,couldnot連用)無法抗拒,無法抵擋。其它將存活下來并傳遞給其后代抵抗這種病能力。23/26baseon/upon以……為基礎(chǔ),依據(jù)其結(jié)構(gòu)為:basesth.on/upon

sth.isbasedon/upon6.Basedonwhatweknownow,youcannotcloneanimalsthathavebeenextinctlongerthan10000years.