冀教版九年级英语上册《DNA-The Story of You》Loo k into Science 课件

Lesson29DNA—TheStoryofYouLookintoScienceUnit5

Lookatthepicture.Whatyoufind?Thegirllookslikehermother.Theboylookslikehisfather.YourDNAcomesfromyourparents.Whydotheylookthesame?ThisistheshapeofDNA.Doyouthinkit’smagic?“DNA”isshortfordeoxyribonucleicacid.blueprintgrandsongranddaughtertwinThey’retwins.instructionblueprintgeneral complex twinrepeatpattern n.

蓝图adj.一般的；普通的adj.

复杂的n.双胞胎之一v.

重复;复述;背诵n.模式；形式identifyrelatedgrandsongranddaughterinstructionv.确认；鉴别 adj.

指示；说明n.孙子；外孙n.孙女；外孙女n.

指示；说明Readthetitleandlookatthepictureinthebook.WhatdoyouknowaboutDNA?DNAisaboutyourself.It’sshapeisspecialandmagic.Readthefirstpartofthepassageandanswer.1.Whatisablueprint?2.Whatistheblueprintoflife?It’sadrawingthatshowshowtoputahousetogetherwithmanydifferentparts.DNA.3.Whichismorecomplex,buildingalivingthingorbuildingahouse?Why?4.Beforeweareborn,whatcanbeinfluencedbyourDNA?Buildingalivingthingisfarmorecomplex.BecauseittakesmillionsofyearsfornaturetochangetheDNAinlivingthingstomakethemfittheworldtheylivein.Ourheight,thecolourofoureyes,thesizeofourfeet.Readthesecondpartofthepassageandanswer.1.DosometwinshavethesameDNA?2.Whatmightthescientistshelpwithyourhealthproblemsinthefuture?Yes,theydo.TheymightbeabletochangeyourDNAbeforeyougetsick.3.WherearecopiesofyourDNA?4.WhoseDNAisrelatedtoyours?Ineverypartofourbodies.Peoplewhoarerelatedtome.Forexample,myparentsandgrandparents.Readthemindmap.Thenretell.1.Butbuildingalivingthingisfarmorecomplexthanbuildinga

house.但创造一个生物比盖房子要复杂得多。far用于比较级表示程度，这样的词语还有much、still、even、no、alittle、abit、alot、rather、any等。Theroomisabitlargerthanthatone.这个房间比那个稍大一点。Heworksstillharderthanever.他比以往更加努力学习了。Mattersarealotbetterthaneverbefore.情况远远比以前好。Canhejumpanyhigher?他能跳得更高一些吗？LessonOneismucheasierthanLessonTwo.第一课比第二课容易得多。Tomlooksevenyoungerthanbefore.汤姆看上去甚至比以前还年轻。2.Exceptforsometwins,everylivingthingshasitsownuniqueDNA.除了同卵双胞胎之外，每个生物都有自己独特的DNA。辨析：except、exceptfor、besides与butexcept除……之外，不包括后面提到的内容。exceptfor除……之外，除去整体中的一部分，前后为不同类。besides除……之外还有，包含后面提到的内容but除……之外，通常与nothing、nobody、no等否定词连用WeallwenttothezooexceptLiMing.除了李明，我们都去了动物园。Theshirtlooksgoodexceptforitscolour.这件衬衫除了颜色，还不错。Ihavetwobooksbesidesthisone.除了这本，我还有两本。（共三本）Thereisnothingbutadeskhere.这里除了一张桌子外什么也没有。3.FromyourDNA,scientistscanidentifynotonlyyou,butalsopeoplewhoarerelatedtoyou.从你的DNA中，科学家们不但能够辨认出你，而且能够辨认出和你有血缘关系的人。

(be)relate

to/with表示“与……有关”。Heisrelatedtomyfamily.他与我的家庭有关系。【拓展】relate动词，意为“把……联系起来”。Thematterrelatestohim.这事与他有关。Ican’trelatewhathedoeswithwhathesays.我无法把他的言行联系起来。4.Read,findandtranslate.一般而言，通常把……组装在一起……和……一样……除了不但……而且……和……有关

数十亿的ingeneralput…together…thesame…as…exceptfornotonly…butalso…berelatedtobillionsofIsitagoodideatochangetheDNAofthefoodweeat?Somepeoplesaydoingthismakesourfoodbetter.Othersthinkit’stoodangerous.SearchtheInternetforinformationandwritedownyourideas.完成句子，每空一词。1.轻工业和农业密切相关。

Lightindustryisclosely________________agriculture.2.除了窗子小外,这座房子很漂亮。

Thehouseisbeautiful___________thesmallwindows.3.你的头发和皮肤有同样的DNA。

Yourhairhas_________________________yourskin.4.她不但会唱歌，而且会跳舞。

Shecan___________sing______________dance.relatedtoexcept