教案《聲音的產(chǎn)生和傳播》

1、課題： 2.1 聲音的產(chǎn)生與傳播教材分析本節(jié)是通過觀察和實(shí)驗(yàn)，探究聲音的產(chǎn)生和傳播。教師組織、指導(dǎo)學(xué)生在探究過程中，仔細(xì)觀察、認(rèn)真分析，并能得出正確結(jié)論，通過學(xué)習(xí)，要正確掌握兩個(gè)結(jié)論：聲音是由物體的振動(dòng)產(chǎn)生的； 聲音的傳播需要介質(zhì)；同時(shí)， 在教師的啟發(fā)和引導(dǎo)下， 初步了解解決物理問題所經(jīng)常采用的方法，即提出問題f猜想和假說f實(shí)驗(yàn)檢驗(yàn)-得出結(jié)論，讓學(xué)生沿著這個(gè)思路開展活動(dòng)。教學(xué)目標(biāo)一、知識與技能通過學(xué)生的觀察和自主實(shí)驗(yàn)， 教師的演示實(shí)驗(yàn)， 知道聲音是由物體振動(dòng)產(chǎn)生的， 知道 聲音的傳播需要介質(zhì)；通過教材了解聲音在不同的介質(zhì)中傳播速度不同， 結(jié)合生活實(shí)際知道回聲及回聲的應(yīng) 用。二、過程與方法通過觀

2、察和實(shí)驗(yàn)的方法，探究聲音是如何產(chǎn)生的，聲音是如何傳播的；通過學(xué)生的活動(dòng)， 初步了解物理實(shí)驗(yàn)的過程和方法， 鍛煉學(xué)生初步的觀察能力和研究 物理問題的能力。三、情感態(tài)度與價(jià)值觀通過教師、 學(xué)生的雙邊活動(dòng)， 激發(fā)學(xué)生的學(xué)習(xí)興趣和對科學(xué)的求知欲望， 使學(xué)生樂于探索自然現(xiàn)象和日常生活現(xiàn)象中的物理學(xué)的道理；注意在活動(dòng)中培養(yǎng)樂于與其他同學(xué)合作的意識。教學(xué)重點(diǎn)通過觀察和實(shí)驗(yàn)，探究聲音的產(chǎn)生和傳播。教學(xué)難點(diǎn)組織、指導(dǎo)學(xué)生在探究過程中，仔細(xì)觀察、認(rèn)真分析，并能得出正確結(jié)論。教學(xué)設(shè)施音叉、 鐵架臺、 真空罩實(shí)驗(yàn)裝置、 橡皮筋、 泡沫塑料球、 線、 鼓、 硬紙片、 多媒體等。 教學(xué)方法 探究法、討論法、實(shí)驗(yàn)法、觀察法

3、。教學(xué)過程一、創(chuàng)設(shè)問題情境，引入新課1）結(jié)合課本，利用多媒體或錄音機(jī)播放“人與自然的和諧之聲” （包括嬰兒的啼哭、鋼琴聲、笛音、濤聲、鳥叫聲等）。（ 1 分鐘左右的綜合視頻）2）教師：美好的音樂給大家?guī)砹诵撵`的享受。聲音是我們獲取信息的主要渠道之一，關(guān)于聲音你們還想知道什么呢？3）學(xué)生發(fā)揮想象力，大膽提出問題（教師把學(xué)生問題羅列在黑板上）。4）教師：要想知道這些問題的答案，就需要同學(xué)們和老師共同協(xié)作，一起去探究。讓我們先來看看聲音是如何產(chǎn)生的。（板書課題：聲音的產(chǎn)生和傳播）二、師生共同活動(dòng)，進(jìn)行新課探究過程A、 1 分鐘學(xué)生開放性實(shí)驗(yàn)：（學(xué)生自由活動(dòng)，利用各種方法發(fā)聲）例如：摸著喉頭發(fā)聲，體

4、驗(yàn)；學(xué)生用直尺按在桌邊彈動(dòng)使其發(fā)聲，敲桌子 學(xué)生分析聲音產(chǎn)生原因。B、撥動(dòng)橡皮筋，聽到聲音的同時(shí)觀察現(xiàn)象；C、在桌子上彈鋼尺，觀察現(xiàn)象；D教師演示實(shí)驗(yàn)：敲響音叉靠近泡沫塑料小球；學(xué)生觀察現(xiàn)象、分析原因，得出結(jié)論：一切發(fā)聲體都在振動(dòng)，我們把正在發(fā)聲的物體叫做聲源。（板書）學(xué)習(xí)反饋：師生共同活動(dòng)，分析常見的發(fā)聲現(xiàn)象。（展示課件：舉出發(fā)聲現(xiàn)象）（選擇2或3個(gè)問題，重點(diǎn)分析討論，剩下的讓學(xué)生課后思考）蚊子、蜜蜂等飛過有嗡嗡的聲音，是靠翅膀的振動(dòng)而發(fā)出的?？谇俚穆曇?，是由于氣流的沖擊，琴內(nèi)的彈簧片發(fā)生振動(dòng)發(fā)出的。悠揚(yáng)的薩克斯聲是由于氣流通過管時(shí)，使管內(nèi)空氣柱振動(dòng)而發(fā)出的。吹口哨聲是口腔內(nèi)空氣振動(dòng)產(chǎn)生的。

5、炎熱的夏天，響亮的蟬鳴是蟬的發(fā)音肌收縮時(shí)，引起發(fā)音膜的振動(dòng)而產(chǎn)生的。氣球爆炸聲是氣球膜的振動(dòng)引起周圍空氣的振動(dòng)而產(chǎn)生的。聲勢浩大的瀑布聲是水撞擊石頭，引起空氣的振動(dòng)發(fā)出聲音。學(xué)生看書了解唱片、磁帶和激光唱盤記錄聲音的方法。（ flash展示：唱片記聲）剛才我們發(fā)現(xiàn)聲音是靠振動(dòng)產(chǎn)生的，那么聲音又是如何傳到我們的耳朵里的呢？探究過程讓我們來看看下面的實(shí)驗(yàn)（視頻：真空罩中的鬧鐘）把一只正在響鈴的鬧鐘放在接有抽氣機(jī)的玻璃罩內(nèi)，用抽氣機(jī)逐漸抽出其中的空氣，隨著罩內(nèi)空氣的抽出，請同學(xué)們注意聲音有什么變化？學(xué)生討論、分析得出：空氣可以傳播聲音，真空不能傳播聲音。教師指出：我們平常能聽到彼此講話的聲音，就是依

6、靠空氣傳聲的。像空氣這樣能夠傳聲的物質(zhì)我們把它叫做 （板書）介質(zhì)。假想：云層和我們之間是真空， 大家就聽不到雷聲了； 大家聽到老師上課的聲音也是靠空氣傳播的，那么固體和液體可以傳聲嗎？如果可以，你能舉例證明嗎？學(xué)生分組討論。學(xué)生實(shí)驗(yàn)把兩張課桌緊緊地挨在一起，一個(gè)同學(xué)輕敲一張桌面的一端，而另一個(gè)同學(xué)把耳朵貼在另一張桌面的一端，可以清晰地聽到敲桌子的聲音。學(xué)生演示“土電話”實(shí)驗(yàn)。（flash ）學(xué)生討論、分析得出：固體可以傳播聲音。展示“這是為什么（一）？ ”海豚聽著訓(xùn)練員的哨聲表演；花樣游泳運(yùn)動(dòng)員跟著音樂起舞；池塘里的魚被掌聲嚇跑了。這三個(gè)現(xiàn)象說明了什么?探究結(jié)論：填表說結(jié)論聲音的傳播靠介質(zhì)，真

7、空中不能傳聲.1圖片：貝多芬用木棍聽琴聲說明了：固體能傳聲2圖片：拍手聲驚動(dòng)金魚跑了說明了：液體能傳聲3圖片：聽到打雷聲說明了：氣體能傳聲結(jié)論：聲音的傳播靠介質(zhì)，真空中不能傳聲。氣體、液體和固體都可以傳播聲音。板書：聲音的傳播靠介質(zhì)，真空中不能傳聲。氣體、液體和固體都可以傳播聲音。聲音在各種介質(zhì)中是以聲波傳播的。以鉛筆點(diǎn)水為例，說明聲音是以波的形式傳播的，展示動(dòng)畫課件聲波。板書：聲音的傳播方式聲波。同學(xué)們閱讀課本一些介質(zhì)中的聲速表：幾種物質(zhì)中的聲速，學(xué)生分組探討下列問 題：問題1:聲音在15 C和25 C的空氣中傳播的速度分別是多大？這說明聲速跟什么 因素有關(guān)？問題2:聲音在25 C的空氣和水

8、（常溫）中傳播的速度分別是多大？這說明聲速跟什 么因素有關(guān)？問題3:從表中可以發(fā)現(xiàn)哪些規(guī)律？得到結(jié)論：聲音在不同介質(zhì)中的傳播速度不同，一般來說，固體中最快，液體中較慢，氣體中最慢。（板書）聲音在同種介質(zhì)中的傳播速度與溫度有關(guān)。（板書）播放一個(gè)回聲資料，讓學(xué)生感受回聲。教師提問：什么叫回聲？（學(xué)生討論得出：當(dāng)聲波碰到一個(gè)障礙物（如懸崖）時(shí)，它會反彈回來，我們會再聽到這個(gè)聲音。）教師追問：任何有障礙的地方都能產(chǎn)生回音，但我們?nèi)粘Ｉ钪袇s不容易分辨。學(xué)習(xí)反饋：例題聲在空氣中的彳播速度是 340米/秒。而人耳能夠把兩個(gè)聲音分辨出來所需要的最短時(shí)間為0.1秒，否則原聲與回聲混在一起，使聲音加強(qiáng)，此時(shí)就分

9、辨不出回聲了。要想聽到自己的回聲，你能推測出自己距離障礙物至少多遠(yuǎn)嗎？ （17米）三、課堂小結(jié)學(xué)生反思本節(jié)課學(xué)到了什么？知識：.聲是由物體的振動(dòng)產(chǎn)生的。.聲的傳播需要介質(zhì)，真空不能傳聲。.聲在不同介質(zhì)中的聲速不同。.回聲的產(chǎn)生和聽到回聲的條件。方法與技能：.體驗(yàn)探究式學(xué)習(xí)的過程。.用放大法研究微小變化。 四、選擇與填空.用力敲銅鑼，銅鑼發(fā)出聲音，停止敲擊，銅鑼“余音未止”，用手按住鑼面，鑼聲消失了，手開始有點(diǎn)麻的感覺，下列說法正確的是（B）A. “余音未止”是回聲現(xiàn)象B.有“余音”說明停止敲擊，銅鑼仍在振動(dòng)C.手有麻的感覺與振動(dòng)無關(guān)D.鑼聲消失了，是手阻礙了聲音的傳播“神舟”七號飛船項(xiàng)目正在籌

10、備過程中。 航天員在飛船內(nèi)可以直接對話， 但在飛船外共 同作業(yè)時(shí)，他們不能直接對話， 必須借助電子通信設(shè)備進(jìn)行交流， 原因是 聲音不能在真空中傳播。.為了探究聲音產(chǎn)生的原因，有人建議利用以下幾個(gè)聲學(xué)實(shí)驗(yàn)現(xiàn)象。（動(dòng)畫：發(fā)聲體）甲：放在鐘罩內(nèi)的鬧鐘正在響鈴，把鐘罩內(nèi)的空氣抽出一些后，鈴聲明顯減弱。乙：使正在發(fā)聲的音叉接觸水面，水面濺起水花。丙：敲擊長鋼管的一端，另一端的同學(xué)可以聽到兩次聲音。?。涸诘踔拇箸娚瞎潭ㄒ恢Ъ?xì)小的筆，把鐘敲響后，讓紙?jiān)诠P尖上迅速滑過，可以在本次課標(biāo)題Unit 2 Love at Home授課教師紙上畫出一條來回彎曲的細(xì)線。你認(rèn)為，能說明聲音產(chǎn)生原因的實(shí)驗(yàn)現(xiàn)象是 乙、丁 ?

11、其它現(xiàn)象雖然不能說明聲音產(chǎn)生的原因，但是分別說明了什么問題？.改革開放后，農(nóng)村產(chǎn)生了巨大的變化.這是小明家車的圖片（我家的車聲），說一說 你家的變化！五、布置作業(yè)5題。2.設(shè)計(jì)一個(gè)實(shí)驗(yàn)：探究聲音是由物體的振動(dòng)產(chǎn)生的?！跋胂胱鲎觥保凑l設(shè)計(jì)的方案更好?！巴岭娏?、板書設(shè)計(jì)一、聲音的產(chǎn)生2.固體、液體、氣體的振動(dòng)都可以發(fā)聲二、聲音的傳播1.聲音的傳播需要介質(zhì)，真空不能傳播聲音聲波3.聲音在不同介質(zhì)中的傳播速度不同，一般來說，固體中最快，液體中較慢，氣體中最三、回聲：聽到回聲的最短時(shí)間為0.1秒，距離17米16級大學(xué)英語C課程單元教學(xué)設(shè)計(jì)（教案）Unit 2 （綜合教程）授課班級授課時(shí)間月 日 節(jié)月

12、日節(jié)月 日 節(jié)月 日節(jié)授課地點(diǎn)棟室棟 室棟室棟 室能力（技能）目標(biāo)知識目標(biāo)教學(xué)目標(biāo)To introduce some English skills on family relations.To improve students reading ability by studying Text ATo improve students communication ability.To improve students listening skills.Ask students to think who do you love most and what kind of a father do y

13、ou have?To know the meaning and usage of some important words, phrases and patternsTo get main idea of the passage第心 容Warm upTalking about family conditionsPre-reading ActivitiesBackground informationWords and Expressions0 薦 共 利 加iFTo know the meaning and usage of some important words, phrases and e

14、xpressions1. stepfather 2. In time3. marry 4. lawnmudPile 7. scatter 8. possibility 9. Shade 10. apartmentresembletouch 13. unique 14. traditionDrop off, the opposite of which is pick up參考資料全新版大學(xué)英語綜合教程預(yù)備級（上海外語教育出版社） 全新版大學(xué)英語聽說教程預(yù)備級（上海外語教育出版社）編號：1Steps（步驟）教學(xué)組織Step One（步驟一）Teaching ProceduresStep I. Wa

15、rm-upFamily lead-in activityHow many members are there in your family?Who are they?What do they look like?What are they like?Who is your favorite?Here are some words for choice:Sibling little sister/brother elder sister/brother only child pretty attractive Lonely slender funny reliable tender gentle

16、 independent hard-working helpful thoughtful2. Background information1). USAPRCParental relations in the WestParental relations in ChinaStep Two（步驟二）Step 2. Pre-reading ActivitiesIntroduce the theme of love at h ome by showing Ss the title of the text.Ask students following questions about their fam

17、ilies (show them on the screen).Who do you love and admire most?What kind of a father do you have?How do you think a father wins the love of his children?Reference:They say that parents are our very first teachers. The way our parents behave has a profound impact on us as we grow up. Admittedly, mos

18、t of the parents around are positive role models for their offspring. They tend to make lots of sacrifices for their children. So as a son or daughter, we will have many thankful stories to share with the rest of the class.Group discussion and question answerStep Three(步驟三)Necessary Words, Phrases a

19、nd Expressions Input:stepfather 繼父Stepmother 繼母 stepchild/stepbrotherin timeOne,經(jīng)過時(shí)間，早晚 e.g. You will learn how to do it Two, 及時(shí) e.g. We were for the train.marryBe married to rather than with ”apartmentContrast with department, which is kinda confusing.uniqueOne, 唯的. #一的 e.g. As far as I know, it s

20、unique and therefore very valuable.Two, 無與倫比的 e.g. This medal is an award for your achievement.Three, 稀罕的, 獨(dú)特的 e.g. The tour gave us the opportunity of seeing what life was really like in the desert.tradition 傳統(tǒng) e.g. It is particularly important for us to keep up our fine Chinese .drop off 讓某人 卜車 e.

21、g. Please drop me off at the next turning.take something for granted 認(rèn)為某事理所當(dāng)然e.g. When Kevin and Julie got married,they took it for granted that they d live happily ever after.Homework（作業(yè)）To memorize the new words and expressions;To preview Text AConclusion（總結(jié)）16級大學(xué)英語C課程單元教學(xué)設(shè)計(jì)（教案）一Unit 1（綜合教程）編號：2本次

22、課標(biāo)題Unit 2 Text AMy Stepfather, My Friend授課教師授課班級授課時(shí)間月 日 節(jié)月 日節(jié)月 日 節(jié)月 日節(jié)授課地點(diǎn)棟室棟 室棟室棟 室教學(xué)目標(biāo)能力（技能）目標(biāo)知識目標(biāo)To develop Ss group discussion skillTo improve Ss ability to retrieve the relevant informationTo stimulate Ss creative thinkingTo arouse Ss interest in learning thes 1. Learn to analyze the text struc

23、ture 2.To grasp necessary words, phrases ar expressions input before reading the tex 3. Let students master some language u points.教學(xué)基本內(nèi)容While-reading ActivitiesFast ReadingAnalyze the text structureIntensive Reading教學(xué)重點(diǎn)和難點(diǎn)Ask students to analyze the text structureExplain some language points.參考資料全新

24、版大學(xué)英語綜合教程預(yù)備級（上海外語教育出版社）Steps（步驟）教學(xué)組織Step One（步驟一）Teaching Procedures While-reading Activities1.1. Fast Reading: Ask Ss to read the passage as quickly as they can. Ask them to underline the topic sentence in each paragraph or summarize it by simple word.Part Division of the Text:Part 1 (Para 1) Main

25、Ideas: The author realized that his stepfather Leo was not only his friend but also his father.Part 2 (Para 2-4) Main Ideas: The author recalled a few incidents that Leo made the family life warm.Part 3 (Para 5-7) Main Ideas: The author described how and why his biological father s request to see hi

26、m regularly was declined and his affection for Leo.Step Two（步驟二）2.2 Ask students to analyze the text structure and fill in the chart with the following expressions.having a divorce and not coming to see the children for a long timeseeing the bright side of thingsready to take on family dutieshaving

27、little sense of responsibility for supporting the familyimpatient, angry and cruelnever shopping with the children or sending them to schoolenjoying family life and ready to accept responsibilitiesloving and devotedcold and hatefulshopping with the child, driving the child to school, and spending ti

28、me with the childStepfatherReal fathertiPersonality2 seeing the bright side of things5 impatient, angry and cruelFeelings for family members8 loving and devoted9 cold and hatefulSense of responsibility3 ready to take on family duties4 having little sense of responsibilityforsupporting the familyPare

29、nt-child relationship7 enjoying family life and ready to accept responsibilities1 having a divorce and nc coming to see the children for a long timeFamily activity10 shopping with the child, driving the child to school, and spending time with the child6 never shopping with the children or sending th

30、em to schoolIntensive Reading: T guides Ss to read the text intensively by explaining some language points.Language Points:At first, he was no one special in my life. (Para.1)形容詞作定語修飾 no one, nobody, nothing, anyone, anybody, anything, someone, somebody, somethin第不定代詞時(shí)，般為后置定語。e.g.Some people might t

31、hink that going shopping together is nothing special, .“Your mother wants flowers; she can plant them here, where there s lots of sun, he said, . (Para.2)where引導(dǎo)非限制性定語從句修飾先行詞hereChinese meaning: “你媽媽喜歡花；她可以在這兒栽，這兒陽光充足，” 他說道，Step Three(步驟三)For years Leo lived in an apartment by himself, and now he wa

32、s putting down roots in the suburbs. (Para.3)The phrase “put down roots means “to leave the old place to settle permanently in a new place .Chinese meaning:里奧多年獨(dú)自一人住在一套公寓房中，現(xiàn)在他終于在郊區(qū) 扎下根來。Little touches my mother s flower garden, Leo s trees made our house unique. (Para.3)The word “touch in this sent

33、ence is a noun, meaning “a distinguishing style. Chinese meaning:母親的花園，里奧栽的樹，這些看似不經(jīng)意的點(diǎn)綴使我們 的房子顯得獨(dú)一無二。Having a father drop you off may have been something my classmates took for granted, but I always thought it was wonderful. (Para.6) 本旬的第一個(gè)分句中動(dòng)名詞復(fù)合結(jié)構(gòu) having a father drop you off作主語；表 語中包括定語從旬 my cla

34、ssmates took for granted飾 something。Chinese meaning:在我的同學(xué)們看來，由父親開車把你送到校門口可能是理 所當(dāng)然的事，可我總感覺棒極了。Homework(作業(yè))Ask students to finish the exercises of sentence structures on pages 22-23Conclusion（總結(jié)）16級大學(xué)英語C課程單元教學(xué)設(shè)計(jì)（教案）一 Unit 2 （綜合教程）編號：3本次課標(biāo)題Unit 2 Text AMy Stepfather, My Friend授課教師授課班級授課時(shí)間月 日 節(jié)月 日節(jié)月 日節(jié)月

35、 日節(jié)授課地點(diǎn)棟室棟 室棟室棟 室能力（技能）目標(biāo)知識目標(biāo)教學(xué)目標(biāo)Students can master some reading skills.Let students work on their contrastive writing skill.Review the phrases and expressions of Text A.students can find out word meanings in the passage by learning the reading skills教學(xué)基本內(nèi)容Text A Post-reading ActivitiesWritingExpla

36、in the Basic Sentence PatternsContrastive WritingReading Skills教學(xué)重點(diǎn)和難點(diǎn)Contrastive WritingReading SkillsFinding out Word MeaningsIn order to find out word meanings we have to pay attention to the following clues: a)Definition b)Examples c) Synonyms d) AntonymsWord stems and affixesGeneral sense of a

37、sentence參考資料全新版大學(xué)英語綜合教程預(yù)備級（上海外語教育出版社） 全新版大學(xué)英語閱讀教程預(yù)備級（上海外語教育出版社）Steps（步驟）教學(xué)組織Step One（步驟一）Teaching Procedures ReadingStepl. Post-reading ActivitiesAnswer the comprehension questions on page 23.Summarize the main idea: The author loves his stepfather dearly.Review the text structure:Part 1 (Para 1) Ma

38、in Ideas: The author realized that his stepfather Leo was not only his friend but also his father.Part 2 (Para 2-4) Main Ideas: The author recalled a few incidents that Leo made the family life warm.Part 3 (Para 5-7) Main Ideas: The author described how and why his biological father s request to see

39、 him regularly was declined and his affection for Leo.Learning English for communication should become a learning objective.Step Two（步驟二）Writing. Explain the Basic Sentence PatternsSubject + Link Verb + Predicative 住 + 系+#)Subject + Intransitive Verb 住 +謂)Subject + Transitive Verb + Object 住+謂+賓)Sub

40、ject + Transitive Verb + Indirect Object +Direct Object (主+謂+間賓+直賓)Subject + Transitive Verb + Object + Complement(主+謂+賓+補(bǔ))Contrastive WritingWhen you compare two things or people by writing, you are having a contrastive writing. List things your parents have done for you and things you have done fo

41、r your parents. Then write a composition on the list.Step Three(步驟三)3. Reading SkillsFinding out Word MeaningsIn order to find out word meanings we have to pay attention to the following clues:a)Definition b)Examples c) Synonyms d) Antonyms e) Word stems and affixes f) General sense of a sentencePur

42、pose: Introduce the reading skill to the Ss and improve their reading abilities.Method: Use multimedia instruction and talk in groups; Use task-based language teaching method, reading approach, communicative approach and total physical response method.T explains the reading skill (reading for the ke

43、y idea in a sentence). Ss practice the skill by doing the exercise on page 18 in pairs.Homework（作業(yè)）Review the key points of Text AFinish the rest of the exercises after classPreview Listening and Speaking courseConclusion（總結(jié)）16級大學(xué)英語C課程單元教學(xué)設(shè)計(jì)（教案）一 Unit 7 （聽說教程）編號：4本次課標(biāo)題Unit 7 Food授課教師授課班級授課時(shí)間月 日 節(jié)月 日

44、節(jié)月 日 節(jié)月 日節(jié)授課地點(diǎn)棟室棟 室棟室棟 室能力（技能）目標(biāo)知識目標(biāo)教學(xué)目標(biāo)To improve students listening skillsTo improve students; speaking ability on the subject of foodTo develop Ss ability to catch the general idea of some listening material and the important details.To help Ss to be more communicative with the help of the words

45、and expressions concerning food.Let students know words and expressions concerning food.To get main idea of some listening material and the important details.To master the meaning and usage of some important words, phrases and patterns教 學(xué) 基 本 內(nèi) 容Warm upGrouping food items in the tableUnderstanding s

46、hort conversationsUnderstanding a short passageSpeaking activities教 學(xué) 重 點(diǎn) 和點(diǎn)Develop students listening skills of how to better grasp the key information and the main idea of the recording materials;Improve students skills of taking down the key words and previewing the contents to be heard;Facilitat

47、e students to carry out speaking activities by using appropriate expressions t talk about food;Motivate students to share their views on food.參考資料全新版大學(xué)英語聽說教程預(yù)備級（上海外語教育出版社）Steps（步驟）教學(xué)組織Step One（步驟一）Teaching ProceduresPre-listening tasksGo through words about food and ask Ss to group the food items in the table. Work in pairs and ask each other the Qs below.Whats your favorite food?What kind of meat/drink/vegetable/fruit do you prefer?What kind of food do you like better, Chinese sty