冀教版九年级英语Unit 5 Lesson 29 《The Study of Living》(共42张PPT).ppt

1、1.DNA脱氧核糖核酸2.blueprint n.蓝图3.general adj.一般的；普通的e.g.He teaches them general knowledge and life skills.他教给他们一般性知识和生活技能。plex adj.复杂的5.twin n.双胞胎之一；孪生儿之一6.repeat v.重复；复述；背诵e.g.Will you please repeat the word?请你重复一遍这句话好吗？7.pattern n.模式；形式8.identify v.确认；鉴别9.related adj.有关的；相关的10.grandson n.孙子；外孙e.g.A gr

2、andma is kissing her grandson.一位奶奶在亲吻她的孙子。11.granddaughter n.孙女；外孙女e.g.The old woman often considers the girl(as)her granddaughter.这个老女人把这个女孩当成她的孙女。12.instruction n.指示；说明e.g.The doctor gave her a bottle of medicine(药)and told her to take it as the instruction.医生给了她一瓶药并告诉她吃药的方法。What do you know about

3、 DNA?What can scientists do with DNA?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?A blueprint is a drawing that shows how to put a house together with/using many different parts.Building a living thing is far more

4、complex than building a house.3.Do some twins have the same DNA?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 you.For example,your parents and grandparents.Yes,some twins have the same

5、DNA.1.In general,a blueprint is a drawing that shows how to put a house together with many different parts.一般而言，蓝图就是一幅图纸，它显示一座房子的构造。in general意思是“一般而言；概括说来（通常置于句首）”。也可以用generally speaking来表示。e.g.In general/Generally speaking,women cry more easily than men.一般而言，女人比男人容易哭。2.But building a living thing

6、is far more complex than building a house.但创造一个生物比盖房子要复杂得多。far用来修饰形容词和副词的比较级，这样的词语还有much,still,even,no,a little,a bit,a lot,rather,any等。e.g.The room is a bit larger than that one.这个房间比那个稍大一点。He works still harder than ever.他比以往更加努力学习了。Matters are a lot better than ever before.情况远远比以往好。Can he jump an

7、y higher?他能跳得更高一些吗？Lesson One is much easier than Lesson Two.第一课比第二课容易得多。Tom looks even younger than before.汤姆看上去甚至比以前还年轻。This train runs much faster than that one.这辆火车比那辆快得多。3.Except for some twins,every living things has its own unique DNA.除了同卵双胞胎之外，每个生物都有自己独特的DNA。except for是“除之外”的意思，但强调对某种基本情况进行具

8、体的细节方面的修正，也可以说是对主要部分的肯定和对局部的否定，它不表示同类事物之间的关系。e.g.Except for one old lady,the bus was empty.除一位老太太乘坐外，公共汽车空无一人。She would have left her husband years ago except for the children.要不是为了孩子，她几年前就离开她的丈夫了。except意思是“除之外”，它要求排除的是同类。另外，except一般不用于句首。e.g.We all went to the zoo except Li Ming.除了李明以外，我们都去了动物园。I d

9、id nothing except watching TV yesterday.昨天，我除了看电视以外，什么也没干。besides意思是“之外（尚有）”，包括besides之后的内容。e.g.He also knows Japanese besides English.除了英语之外，他也懂日语。（两门外语他都懂）Two other boys are on duty today besides you.包括你在内还有两名男孩今日值日。（共三人）【运用】将下面的汉语句子翻译成英语。昨天，除玛丽以外，我们都去公园了。_ _We all went to the park yesterday excep

10、t Mary.4.From your DNA,scientists can identify not only you,but also people who are related to you.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。relate与to/with连用，表示“与有关”或“使互相关联”。e.g.He is related to my family.他与我的家庭有关系。The matter relates to him.这事与他有关。I cant relate what he does with what he says.我无法把他的言行联系起来。5.Your

11、 DNA has billions of instructions that explain why you are the way you are.你的DNA中有数百万个指令，来解释你为什么是现在这个样子。(1)DNA(Deoxyribonucleic acid),中文译名为“脱氧核糖核酸”，是染色体主要化学成分，同时也是基因组成的材料，有时被称为“遗传微粒”。DNA是一种分子，可组成遗传指令，构成一个简单生命至少需要265到350个基因，以引导生物发育与生命机能运作。主要功能是长期性的资讯储存，可比喻为“蓝图”或“食谱”。其中包含的指令，是建构细胞内其他的化合物，如蛋白质与RNA所需。带有

12、遗传讯息的DNA片段称为基因，其他的DNA序列，有些直接以自身构造发挥作用，有些则参与调控遗传讯息的表现。(2)句末的you are是the way的定语从句。the way 的定语从句引导词可用 in which，或用that,也可以不用引导词。way在本句中的意思是“情况；状态”。e.g.“How long has he been this way?”the doctor asked.医生问：“他这种情况有多久了？”The business is in a poor way.生意境况不佳。(3)billions of 数以亿计的；亿万e.g.Billions of stars twinkl

13、ed in the sky.无数星星在天空闪烁。6.from your DNA,scientists can identify not only you,but also people who are related to you.从你的DNA中，科学家们不但能够鉴别你，而且也能鉴别和你有关系的人。both.and.,either.or.,neither.nor.not only.but(also).both.and.意为“和 都；既又”；either.or.意为“或者或者；要么要么”；neither.nor.意为“既不也不”；Not only.but(also).意为“不仅而且”他们都连接两

14、个相同的成分。如：Both John and Tom like playing football after school.约翰和汤姆喜欢放学后踢足球。We can either watch TV or go swimming.我们可以看电视，也可以去游泳。His aunt is neither a doctor nor a nurse.他的姑妈既不是医生也不是护士。Mum bought not only fruit but(also)vegetables.妈妈不仅买了水果，而且也买了蔬菜。both.and.连接两个主语时，谓语动词用复数形式；either.or.,neither.nor.或n

15、ot only.but(also).连接两个主语时，谓语动词通常与邻近的主语在人称和数上保持一致。如：Both she and I are interested in collecting stamps.她和我都对集邮感兴趣。Either you or he is flying to Beijing next Sunday.不是你就是他下星期日飞往北京。Neither Tom nor we want to have coffee.我们和汤姆都不想喝咖啡。Not only Zhang Nans parents but(also)her brother does exercise every mo

16、rning.张楠的父母和她的兄弟每天早上都锻炼身体。根据汉语意思完成英语句子，每空词数不限。(1)他和他妹妹都没有电脑。_ a computer.(2)不但王先生讲英语而且我也讲。_ _ English.(3)你可以去公园，也可以在家弹钢琴。You can _ _.Neither he nor his sister hasNot only Mr.Wang but(also)I speak/Both Mr.Wang and I speak either go to the park or play the piano at home(4)昨天我弟弟和我都病了。_ ill yesterday.(5

17、)要么杰克，要么我明天将出发去伦敦。_ leaving for London tomorrow.Either Jack or I amBoth my brother and I wereFill in the blanks with the phrases in the box.in general except for not only but also related to even if the same as1.Your homework is quite good _ a few spelling mistakes.2._ the young _ the old like pop m

18、usic.except forNot only but also3.Kates hair is _ colour _ her sisters.4._,women live longer than men.5._ many difficulties remain,we can overcome them.6.Is wealth _ happiness?the same asIn generalEven ifrelated toComplete the passage with the sentences in the box.Changing DNA Do you know DNA can be

19、 changed?Have 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.AScientists 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 scien

20、tists 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?CBA.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.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.Search the Internet for information and write down your ideas.