九年級英語上冊 Unit 5 Look into Science Lesson 29 DNA—The Story of You教學課件 (新版)冀教版.ppt
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,Unit5LookintoScience,Lesson29DNA-TheStoryofYou,ThisistheshapeofDNA.,“DNA”isshortfordeoxyribonucleicacid.,Doyouthinkitsmagic?,biology,?,生物,?,a?,?,blueprint,計劃,藍圖,complex,復雜的,合成的,pattern,模式,圖案,樣品,identify,確定,認同,general,一般的,普通的,introduction,指令,命令,指示,related,有關(guān)系的,有關(guān)聯(lián)的,敘述,Readthelessonandanswerthequestions:,Whatisablueprint?Whichismorecomplex,buildingalivingthingorbuildingahouse?DosometwinshavethesameDNA?IsitpossibletochangeyourDNA?WhoseDNAisrelatedtoyours?,Readthelessonandanswerthequestions.(1)Whatisablueprint?(2)Whichismorecomplex,buildingalivingthingorbuildingahouse?(3)DosometwinshavethesameDNA?,Ablueprintisadrawingthatshowshowtoputahousetogetherwithmanydifferentparts.,Buildingalivingthingisfarmorecomplexthanbuildingahouse.,Yes,theydo.,(4)IsitpossibletochangeyourDNA?(5)WhoseDNAisrelatedtoyours?,Yes,itis.Inthefuture,scientistsmightbeabletochangeourDNA.,Peoplewhoarerelatedtome.Forexample,myparentsandgrandparents.,between與amongbetween用于兩者之間,among一般指三者或三者以上。JacksitsbetweenTimandBob.Jack坐在Tim和Bob之間。Shewasamongthecrowd.她處在人群中。,use…todosth.用……做某事Sheisusingaknifetocutvegetables.她正用小刀切蔬菜。use的形容詞是useful.Isthefridgeveryuseful?這臺冰箱很有用嗎?,too與eithertoo與either都表示“也”,其區(qū)別是too用于肯定句,表示“也”;either用于否定句,表示“也不”。他們通常都位于句末,其前用逗號隔開。Hehasababybrother,too.他也有個小弟弟。Hedoesn’thaveaneraser,either.他也沒有橡皮。,own的用法adj.自己的(用在所有格后面,加強語氣)Hemakesallhisownnotebooks.她所有的衣服都是自己做的。vt.有;擁有Whoownsthecar?這輛汽車是誰的?ownern.所有人;物主Sheistheownerofthehouse.她是這座房子的主人。,exceptfor除……以外,只是Davidisagoodmanexceptforhottemper.大衛(wèi)除了脾氣暴躁以外,他是個好人。Theclassroomisniceexceptfordirtyonthefloor.教室除了地板臟以外都很好。,Fillintheblankswiththephrasesinthebox.ingeneral,exceptfor,notonly…butalso,relatedto,evenif,thesame…as…1.Yourhomeworkisquitegoodafewspellingmistakes.2.theyoungtheoldlikepopmusic.3.Kate’shairiscolourhersister’s.4.,womenlivelongerthanmen.5.manydifficultiesremain,wecanovercomethem.6.Iswealthhappiness?,exceptfor,Notonlybutalso,thesameas,Ingeneral,Evenif,relatedto,Completethepassagewiththesentencesinthebox.ChangingDNADoyouknowDNAcanbechanged?Haveyoueverseenapigwithadog’sbody?Ofcoursenot!Pigsanddogscan’thavebabiestogether.________Butnow,scientistscandoit.ScientistscantakeDNAfromonekindofanimalandputitintoanotherkindofanimal.TheycandesignnewplantsbycombiningtheDNAofotherplants.________Somescientistsareworried.TheysayweneedtoknowmoreaboutDNAbeforewestartchangingit.Butwhatiftheplantsarebadforhumans,too?A.TheirDNAcan’tcombine.B.Wecanmakeplantsthatarebadforpests.C.TheycanevencombinetheDNAofaplantandananimal.,A,C,B,IsitagoodideatochangetheDNAofthefoodweeat?Somepeoplesaydoingthismakesourfoodbetter.Othersthinkit’stoodangerous.1.Discusstheideaofyours.2.Writedownyourideas.,Groupwork:,1.Listenandread.2.Finishexercisesofthislesson.,Homework,- 配套講稿:
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