下载文档原格式
Unit 2 CloningⅠ.重要单词聚焦1． vi. 不同；相异2． vt. 着手；从事；承担3．n. 突破4．vi. 反对；不赞成5．vt. 获得；赢得6． vt. 获得；到达(水平、年龄、状况等) 7． vt. 禁止；不准differundertakebreakthroughobjectobtainattainforbid8． vt. 积累；聚积9． vt. 欠(账、钱、人情等)；归功于……10．adv. 立刻；不久11． vi. 退休；离开12． vt.& vi. 打扰；操心13．n. 假定；设想14．n. 规则；规章；法规15．vi.& vt. 打；撞击；罢工16．adj. 虚荣的；自负的；徒劳的Accumulateoweshortlyretire botherassumptionregulationstrikevain17．vt. 抵抗；对抗18． adv. 仅；只；不过19．n. 装饰20． vt. 崇拜；爱慕；喜爱21． adj. 合情理的；讲道理的；公道的resistmerelydecorationadorereasonableⅡ.重要短语扫描1．pay 得到好结果；取得成功；偿清2．cast 沮丧；不愉快3．in of 赞成；支持4．(be) to (do)．.. 一定或注定(做)……5．...into one’s heart 使……刻骨铭心6． time to time 不时；偶尔7．bring back to 使复生；使复活8．in 白费力气；枉费心机offdownfavourboundstrikefromlifevain9．in good/poor 状况很好(坏)；情况很好(坏)10．have a great on 对……有很大影响conditionimpactⅢ.课文原句突破1．Then came the disturbing news that Dolly had become seriously ill.Cloning scientists were cast down to find that Dolly’s illnesses were more appropriate to a much older animal.[信息提取] be appropriate to (for) sth.适合于……的；适当的。
Unit 2 CloningPeriod3 Language points and learning about language Teaching aims:1.Learn expressions and phrases.2.Learn language points.Teaching important points:Language pointsTeaching methods:Presentation and practiceTeaching aids:A blackboard, chalk and a computerTeaching procedures:Step 1 RevisionRetell the passageStep 2 Language points• 1. It is a way of making an exact copy of another animal and plant. exact adj.精确的, 准确的, 原样的, 精密的What were his exact words?I don’t know the exact size of the room.exactly adv.正确地, 严密地,恰恰That’s exactly what I expected.You’ve arrived at exactly the right moment.exactly speaking准确地说2. It also happens in animals when twins identical in sex and appearance are produced from the same original egg.这种现象也发生在动物身上，从同一个原生卵子产生性别和相貌相同的双胞胎也是克隆。
(1)It 指代上文的cloning(2)happen vi. occur by chance; take place(偶然地）发生；出现happen to do …happen to sb.It happened that …happening n. 事件；偶然发生的事(常用复数)(3) identical in sex and appearance 是一个形容词短语作后置定语,修饰twinsidentical adj.(常与with连用)完全相同的，用identical 翻译如下句子这两种样式几乎完全相同。
Unit 2 Cloning李仕才***阅读理解。
Spider(蜘蛛) webs have something in common with guitar strings. The long, thin strings on a guitar can vibrate(振动). They move back and forth, or from side to side. So do webs made by spiders. The lines of silk they produce can carry vibrations. This movement gives the small creature information about what landed on the web.Spiders have eight legs and usually eight eyes. The animals build webs with their own soft, naturallymade silk. And much like playing the strings of a guitar, a spider can send out vibrations across its web over many different frequencies(频率). Spiders catch their food, usually insects in their webs. They make small movements, which spread across their webs. The vibrations can give the spider details about what is caught in the web—maybe a possible mate，or something tasty to eat.Vibrations are not just used to spot what is for dinner. They are also important in courtship(求爱), so lots of males will actually create a very specific kind of musical pattern which the females can use to determine not only that they’re a male, but they’re the right species, and whether they might want to mate with them as well.Spiders make their own vibrations to find out the condition of the webs. By controlling the tightness of the material, they can effectively control how information is getting to them when they hang out in the middle of the web.Spiders have a special ability to shape the physical nature of their selfmade materials and creations. Scientists think that spider silk may have changed over time for this purpose.【解题导语】本文介绍了蜘蛛吐出的蛛丝可以传播不同频率的振动，这些振动让它们知道蜘蛛网上落下了什么东西并且这些振动在求爱中也非常重要。
