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1、Unit 2 lesson3 Bell and His TelephoneTHE ANSWERS ARE:1.electrical 電力的2.keen desire 強(qiáng)烈的愿望3.settle (in )定居4.citizen 居民Do you know who he is ?BELL AND HIS TELEPHONE 電話的發(fā)明家是英國人亞歷山大貝爾。 貝爾出生在英國一個(gè)聲學(xué)世家，后移居美國。在波士頓曾開辦過增益聾啞人教師的學(xué)校。由于職業(yè)上的原因，他研究過聽和說的生理功能。后受聘為波士頓大學(xué)聲音生理學(xué)教授，1873年，他辭去教授職務(wù)，開始專心研制電話。 要研制成電話，先要把聲音信號變成電信

2、號，再把電信號變成聲信號，在貝爾之前，已經(jīng)有不少人在研究這個(gè)問題。1875年貝爾在工作中看到電報(bào)機(jī)中應(yīng)用了能夠把電信號和機(jī)械運(yùn)動互相轉(zhuǎn)換的電磁鐵，這使他受到了啟發(fā)。貝爾開始設(shè)計(jì)電磁式電話。他最初把音叉放在帶鐵芯的線圈前，音叉振動引起鐵芯相應(yīng)運(yùn)動，產(chǎn)生感應(yīng)電流，電流信號傳到導(dǎo)線另一頭經(jīng)過轉(zhuǎn)換，變成聲信號，隨后，貝爾又把音叉換成能夠隨著聲音振動的金屬片，把鐵芯改作磁棒，經(jīng)過反復(fù)實(shí)驗(yàn)，制成了實(shí)用的電話裝置。1876年，貝爾又獲得了美國的電話專利，他不僅發(fā)明了電話，而且建起了世界上第一家電話公司。 1.Do you know who invented the telephone? 2. why did

3、 he have a keen desire to help the deaf 3.What has his invention brought us? 4.What has the “electrical speech machine” paved the way for?Answer the following questions after read the text!1.be interested in doing2.Train訓(xùn)練 train sb to do sth 1)We must train them to think independently. 2)Elephants c

4、an be trained to do a lot of things, such as carrying people, moving heavy things, and even entertaining tourists. 3.Public speaking 演說，演說技巧open to the public be open to the publicPublic: adj. 公眾的 n.公眾，公共場所in public當(dāng)眾，公開地；公然give to the public =give to the world出版，發(fā)表 go public： 把隱私(或秘密)公諸于眾1)Most peo

5、ple are against smoking in public places 2)For the benefit of the public, do not litter Lesson notes 4.the deaf (the+形容詞，過去分詞-泛指一類人或物） 1)We must look after the aged 2)The duty of a nurse is to take good care of the sick 3)The rich are not always happy. 4)He devoted his life to helping the disabled t

6、he wounded/ the unknown/the blind/the poor 5.keen 強(qiáng)烈的，熱衷的，渴望的 be keen on 熱衷于 have a keen desire 有強(qiáng)烈的愿望1)He has a keen interest in gardening 2)he is keen on collecting stamps3)The children always has a keen desire to learn 6.For conj.因?yàn)?；由于的緣故Lesson notes 7.With hope for 帶著的期望 1)With hope for a better

7、 life, many farmers come to work in cities 2)With hope for better education , he entered Fudan University.8.settle in Vt./Vi 定居， 移民于 1)Some foreigners settled in America and established their business there. 2) Mr. white settled his family in shanghai last year 3) I must settle all my affairs before

8、 leaving. 9.lead to lead sb to do sth Vt./Vi 引導(dǎo)， 導(dǎo)致 1)His interest in painting led him to become a painter later 2) It could lead to infection and other problems. 3) Success often leads to arrogance, and arrogance to failure. Lesson notes because, since, as, for表示原因的用法區(qū)別關(guān)于 because：語氣最強(qiáng)，表示直接原因，可用于回答

9、why 提出的問題、引導(dǎo)表語從句、用于強(qiáng)調(diào)句等，而其余三者均不行：1)“Why didnt he come?” “Because he was ill.” 2)My stomach hurts because I have eaten too many apples. 3)Thats because you cant appreciate music. 4)It is because he is honest that I like him. 關(guān)于 since 與 as： 兩者所表示的原因都是人們已知的，即對已知事實(shí)提供理由，而不是表示直接原因。since 比 as 語氣稍強(qiáng)，且比 as 略為

10、正式，它們引導(dǎo)的從句通常放在主句之前，有時(shí)也放在主句之后：1)As you werent there, I left a message. 2)Since you are wrong, you should apologize. since 可用于省略句，而其他三者不行：1)Since so, I have nothing to say. 既然如此，我無話可說。Grammar Grammar 關(guān)于 for：是并列連詞,其余三者為從屬連詞 表原因時(shí)提供補(bǔ)充說明，for 分句應(yīng)后置，有時(shí)可與because替換 還可表示對前面內(nèi)容的解釋或推斷比較，不可與Because替換：1)The ground

11、is wet, for (=because) it rained last night. 2)It must have rained last night, for the ground is wet this morning. 昨晚一定下過雨，你看今天早上地面是濕的。 (此句不能用 because 代 for)Excises _you are ill, Ill go aloneThe days breaks, _ the birds are singing.Someone in the house must be ill, _a doctor has just come out.He is

12、absent today _ he is ill_it is snowing, we shall not got to the park.THE ANSWERS ARE: Since For For Because As AFTER READING THE TEXT, YOU CAN CHOOSE EITHER TASK TO DO.After reading the text, you can choose either task to do.THEN SHOW YOUR ANSWERS T T T T T T T T work 2.source 3.apply for 4.send 5.mobile phone 6.typeHomework for today 用60-70個(gè)單詞，寫寫常規(guī)電話，手機(jī)和電子郵件的優(yōu)勢和劣勢，可以參考我們的那篇reading