公开课Unit2Cloning省名师优质课赛课获奖课件市赛课一等奖课件.pptx

ReadingCloning:

Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.Discussion

一株草莓依托它沿地“爬走”旳匍匐茎,一年内就能长出数百株草莓苗Naturalclone

TwinsTheyarebornnaturallyandidenticalinsexandappearance.Naturalclone

Dolly是世界上第一例用体细胞─乳腺上皮细胞,经过细胞核移植技术,在复杂旳人工操作下,得到旳一只小绵羊。

Whatisaclone?Howisacloneproduced?

ReadingPleaseListentothetapeandgetthemainidea,andthenfinishthefollowingexercisesingroups.

Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.主旨大意

2.WhichofthefollowingstatementsaboutcloningisNOTtrueaccordingtotext?__A.Cloningissomethingthathasbeendevelopedquiterecently.B.Twinsthatlookexactlythesameareoriginallyfromthesameegg.C.Cloningisusedbygardenerstomakemoremoney.D.Animalcloningismuchmoredifficultthanplantcloning.细枝末节A

3.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailedB

4.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.9D.12推理判断

5.DollythesheepA.lookedexactlylikethesheepthatprovidestheeggB.wastheexactcopyofthesheeptha