九年級英語上冊Unit5LookintoScienceLesson29DNA—TheStoryofYou教學(xué)課件.pptx

1、,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?,biology,生物,a,blueprint,計劃，藍(lán)圖,complex,復(fù)雜的，合成的,pattern,模式，圖案，樣品,identify,確定，認(rèn)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,Read the lesson

2、 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 co

3、mplex, 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)

4、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與among between用于兩者之間，among一般指三者或三者以上。 Jack sits between Tim and Bob. Jack坐在Tim和Bob之間。 She was among the crowd. 她處在人群中。,

5、useto do sth. 用做某事 She is using a knife to cut vegetables. 她正用小刀切蔬菜。 use的形容詞是useful. Is the fridge very useful? 這臺冰箱很有用嗎？,too與either too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。 He has a babybrother, too. 他也有個小弟弟。 He doesnt have an eraser, either. 他也沒有橡皮。,own的用法adj. 自己的（

6、用在所有格后面，加強(qiáng)語氣） He makes all his own notebooks. 她所有的衣服都是自己做的。 vt. 有；擁有 Who owns the car? 這輛汽車是誰的？ owner n. 所有人；物主 She is the owner of the house. 她是這座房子的主人。,except for除以外，只是 David is a good man except for hot temper. 大衛(wèi)除了脾氣暴躁以外，他是個好人。 The classroom is nice except for dirty on the floor. 教室除了地板臟以外都很好。,F

7、ill in the blanks with the phrases in the box. in general, except for, not onlybut also, related to, even if, the sameas 1.Your homework is quite good a few spelling mistakes. 2. the young the old like pop music. 3.Kates hair is colourher sisters. 4. ,women live longer than men. 5. many difficulties

8、 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? Have you ever seen a pig with a dogs body? Of course not! Pigs and dogs cant h

9、ave 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 t