九年级英语上册-Unit-5-Look-into-Science-Lesson-29-DNA—The-Story-of-You教学讲义-(新版)冀教版.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,Unit 5 Look into Science,Lesson 29 DNA-The Story of You,This is the shape of DNA.,“,DNA”,is short for,deoxyribonucleic acid.,Do you think its magic?,b,i,o,l,o,g,y,生物,a,blueprint,计划，蓝图,complex,复杂的，合成的,pattern,模式，图案，样品,identify,确定，认同,general,一般的，普通的,introduction,指令，命令，指示,related,有关系的，有关联的，叙述,Read the lesson and answer the questions,：,What is a blueprint?,Which is more complex,building a living thing or building a house?,Do some twins have the same DNA?,Is it possible to change your DNA?,Whose DNA is related to yours?,Read,the,lesson,and,answer,the,questions.,(,1,),What,is,a,blueprint,?,(,2,),Which,is,more,complex,building,a,living,thing,or,building,a,house,?,(,3,),Do,some,twins,have,the,same,DNA,?,A,blueprint,is,a,drawing,that,shows,how,to,put,a,house,together,with,many,different,parts.,Building,a,living,thing,is,far,more,complex,than,building,a,house.,Yes,they,do.,(,4,),Is,it,possible,to,change,your,DNA,?,(,5,),Whose,DNA,is,related,to,yours,?,Yes,it,is.In,the,future,scientists,might,be,able,to,change,our,DNA.,People,who,are,related,to,me.For,example,my,parents,and,grandparents.,between,与,among,between,用于两者之间，,among,一般指三者或三者以上。,Jack sits between Tim and Bob.,Jack,坐在,Tim,和,Bob,之间。,She was among the crowd.,她处在人群中。,useto do sth.,用,做某事,She is using a knife to cut vegetables.,她正用小刀切蔬菜。,use,的形容词是,useful,.,Is the fridge very useful?,这台冰箱很有用吗？,too,与,either,too,与,either,都表示,“,也,”,，其区别是,too,用于肯定句，表示,“,也,”,；,either,用于否定句，表示,“,也不,”,。他们通常都位于句末，其前用逗号隔开。,He has a babybrother,too.,他也有个小弟弟。,He doesnt have an eraser,either.,他也没有橡皮。,own,的用法,adj.,自己的（用在所有格后面，加强语气）,He makes all his own notebooks.,她所有的衣服都是自己做的。,vt,.,有；拥有,Who owns the car?,这辆汽车是谁的？,owner,n.,所有人；物主,She is the owner of the house.,她是这座房子的主人。,except for,除,以外，只是,David is a good man except for hot temper.,大卫除了脾气暴躁以外，他是个好人。,The classroom is nice except for dirty on the floor.,教室除了地板脏以外都很好。,Fill,in,the,blanks,with,the,phrases,in,the,box.,in,general,except,for,not,only,but,also,related,to,even,if,the,same,as,1,.Your,homework,is,quite,good,a,few,spelling,mistakes.,2,.,the,young,the,old,like,pop,music.,3,.Kates,hair,is,colour,her,sisters.,4,.,women,live,longer,than,men.,5,.,many,difficulties,remain,we,can,overcome,them.,6,.Is,wealth,happiness,?,except,for,Not,only,but,also,the,same,as,In general,Even,if,related,to,Complete,the,passage,with,the,sentences,in,the,box.,Changing,DNA,Do,you,know,DNA,can,be,changed,?,Ha,ve,you,ever,seen,a,pig,with,a,dogs,body,?,Of,course,not,!,Pigs,and,dogs,cant,have,babies,together._But,now,scientists,can,do,it.Scientists,can,take,DNA,from,one,kind,of,animal,and,put,it,into,another,kind,of,animal.They,can,design,new,plants,by,combining,the,DNA,of,other,plants.,_,Some,scientists,are,worried.They,say,we,need,to,know,more,about,DNA,before,we,start,changing,it.,But,what,if,the,plants,are,bad,for,humans,too,?,A.Their,DNA,cant,combine.,B.We,can,make,plants,that,are,bad,for,pests.,C.They,can,even,combine,the,DNA,of,a,plant,and,an,animal.,A,C,B,Is,it,a,good,idea,to,change,the,DNA,of,the,food,we eat,?,Some,people,say,doing,this,makes,our,food,better.Others,think,its,too,dangerous.,1.Discuss the idea of yours.,2.Write,down,your,ideas.,Group work:,1.Listen and read.,2.Finish exercises of this lesson.,Homework,