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人教版高中政治必修2對人民負責說課稿

  • 人教版高中歷史必修3“百家爭鳴”和儒家思想的形成教案

    人教版高中歷史必修3“百家爭鳴”和儒家思想的形成教案

    1、知識與能力:知道諸子百家,認識春秋戰(zhàn)國時期“百家爭鳴”局面形成的重要意義;了解孔子、孟子和荀子的主要觀點,理解儒家思想的形成。2、過程與方法:適度引入古代中國政治發(fā)展與傳統(tǒng)文化方面的材料 ,啟發(fā)學生思考百家爭鳴局面形成的重要意義。以列表的方法,從時代、主要觀點、影響等方面,指導學生歸納孔子、孟子和荀子的主要內(nèi)容。以百家爭鳴為主題,組織學生談一談繼承中國傳統(tǒng)文化思想的認識和感受。組織一次“我讀《論語》的讀書活動”。3、情感態(tài)度價值觀:感受中國古代思想的博大精深:通過學習早期儒家的民本思想,培養(yǎng)學生的人文關(guān)懷精神;了解儒家文化是我國傳統(tǒng)文化的最主要部分,認識其在世界文化史上的地位和對后世的影響;聯(lián)系現(xiàn)實,使學生正確對待儒家傳統(tǒng)文化,發(fā)揮其在當代的積極意義。

  • 人教版高中歷史必修3從“師夷長技”到維新變法教案

    人教版高中歷史必修3從“師夷長技”到維新變法教案

    4、維新思想推動下的變法運動雖然失敗了。但這是中國近代真正意義上的一次思想解放潮流,為什么?展開:維新派提倡西學,興民權(quán),對封建專制制度和傳統(tǒng)觀念進行了沖擊,促進了中國人民的覺醒,為資產(chǎn)階級民主思想的傳播奠定了基礎,具有思想解放的啟蒙作用。是一次救亡圖存的愛國運動,也是一次發(fā)展資本主義的改革運動;他們提倡資產(chǎn)階級新學,批判封建主義舊學,引導人們重新認識世界,他們痛感民族危機的嚴重,號召人們奮起救國,謀求國家的獨立富強;給古老的中國社會注入的活力是不可低估的,站在歷史長河的高度看,由傳統(tǒng)農(nóng)耕社會向近代工業(yè)社會轉(zhuǎn)變是一股不可抗拒的歷史潮流,盡管它在19世紀末的中國遭到了暫時挫折,但對清朝的封建專制統(tǒng)治卻是一次巨大的強烈的沖擊波,它留下的痕跡是永不磨滅的,是永遠鼓舞與啟迪后人的。

  • 新人教版高中英語必修1Unit 3 Sports and Fitness- Discovering Useful Structures—tag questions教案

    新人教版高中英語必修1Unit 3 Sports and Fitness- Discovering Useful Structures—tag questions教案

    【教材分析】This teaching period mainly deals with the grammar: tag questions.This period carries a considerable significance to the cultivation of students’ spoken English. The teacher is expected to enable students to master this period thoroughly and consolidate the knowledge by doing some exercise of good quality.【教學目標與核心素養(yǎng)】1. Get students to have a good understanding of the basic usages of tag questions.2. Enable students to use the basic phrases structures flexibly.3. Develop students’ speaking and cooperating abilities.4. Strengthen students’ great interest in grammar learning.【教學重難點】1. How to enable students to have a good understanding of the basic usages of tag questions.2. How to enable students to use the basic usages of tag questions flexibly.【教學過程】Step1: 語法自主探究一、基本組成方法1.肯定式陳述部分+否定附加疑問部分(前肯后否) You often play badminton, don’t you? 你經(jīng)常打羽毛球,是嗎?You are going to the gym with me, aren’t you?你要和我一起去健身房,是嗎?She’s been to shanghai before, hasn’t she? 她以前去過上海,是嗎?2.否定式陳述部分+肯定附加疑問部分(前否后肯) It isn't a beautiful flower, is it? 那不是美麗的花,是嗎?You didn't go skating yesterday, did you? 你昨天沒去滑冰,是嗎?They can’t finish it by Friday, can they?他們不能在星期五之前完成,是嗎?

  • 新人教版高中英語必修3Unit 3 Diverse Cultures-Reading for Writing教學設計

    新人教版高中英語必修3Unit 3 Diverse Cultures-Reading for Writing教學設計

    The topic of this part is “Describe a place with distinctive cultural identity”.This section focuses on Chinese culture by introducing Chinatown, whose purpose is to show the relationship between the Chinese culture and American culture. The Chinese culture in Chinatown is an important part of American culture. Chinatown is an important window of spreading Chinese culture and the spirit homeland of oversea Chinese, where foreigners can experience Chinese culture by themselves.Concretely, the title is “Welcome to Chinatown!”, from which we can know that the article aims at introducing Chinatown. The author used the “Introduction--Body Paragraph--Conclusion” to describe the people, language, architecture, business, famous food and drinks and people’s activities, which can be a centre for Chinese culture and shows its unique charm.1. Read quickly to get main idea; read carefully to get the detailed information.2. Learn the characteristics of writing and language.3. Learn to introduce your own town according to the text.4. Learn to correct others’ writing.1. Learn the characteristics of writing and language.2. Learn to introduce your own town according to the text.Step 1 Lead in ---Small talkIn the reading part, we mentioned the Chinatown of San Francisco. How much do you know about Chinatown of San Francisco ?Chinatown is a main living place for Chinese immigrants, where you can see many Chinese-style buildings, costumes, operas, restaurants, music and even hear Chinese.Step 2 Before reading ---Predict the contentWhat is the writer’s purpose of writing this text ? How do you know ?From the title(Welcome to Chinatown) and some key words from the text(tourist, visit, visitors, experience), we can know the purpose of the text is to introduce Chinatown and show the relationship between Chinese culture and American culture.

  • 新人教版高中英語必修3Unit 4 Space Exploration-Reading and Thinking教學設計二

    新人教版高中英語必修3Unit 4 Space Exploration-Reading and Thinking教學設計二

    The theme of this unit focuses on “space exploration.” Students will learn about the training and experience needed to become an astronaut. The text is mainly about the development of space exploration. On the one hand, the text helps students to have a good understanding about the great feats humans have achieved, on the other hand, they will further understand the contributions that we Chinese have achieved, and feel confident and proud about our homeland and strengthen their love for our country. The teacher should instruct students to aim high and study harder to make great progress in the space career if possible.1. Read about the development and value of space exploration.2. Explore the mysteries of the universe and the achievements in space exploration.3. Skillfully use the vocabulary of this text to cultivate self-study ability 4. Develop cooperative learning ability through discussion.1. Enable the Ss to talk about the development and value of space exploration.2. Guide the Ss to summarize the main idea of each paragraph as well as the main idea of the text.3. Help Ss comprehend the main reasons for space exploration. Multi-media, textbook, notebooks.Step 1: Warming up and predictionLook at the title and the pictures of the text and predict what the text will be about?2. What are the main reasons for space exploration?

  • 新人教版高中英語必修3Unit 4 Space Exploration-Reading for Writing教學設計二

    新人教版高中英語必修3Unit 4 Space Exploration-Reading for Writing教學設計二

    ⑦在我看來, 探索太空是值得的。As far as I am concerned, it is worthwhile to explore the space.Step 10 Writing---draftRecently, students in our class have had heated a discussion on whether space is worth exploring. Students hold different ideas about it.30% of us think space exploration is not worthwhile. They think space is too far away from us and our daily life and is a waste of money. And the money spent on space exploration can be used to solve the earth’s problems such as starvation and pollution.On the other hand,70% think space is worth exploring because we have benefited a lot from it,such as using satellites for communication and weather forecast. What’s more,with further space research,we may solve the population problem by moving to other planets one day. Also,space research will enable us to find new sources to solve the problem of energy shortages on the earth.As far as I am concerned, it is worthwhile to explore the space. Not only can it promote the development of society but also enrich our life. Step 11 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1.Does the writer explain why he/she changed/wanted to change?2.Does the writer tell how the changes have improved or will improve his/her life?3.Is the text well-organised?4.Does the writer use words and expressions to show similarities and differences?5.Are there any grammar or spelling errors?6.Does the writer use correct punctuation?

  • 新人教版高中英語必修3Unit 5 The Value of Money-Listening &Speaking教學設計

    新人教版高中英語必修3Unit 5 The Value of Money-Listening &Speaking教學設計

    Step 4: Listen again and decide if the following statements are true (T) or false (F).1 It was the first time Chen Liyan's story was reported. T口 F口2 Chen found 10,000 yuan in a small plastic bag in Taiyuan railway station口 F口3 Wang Zheng apologized to Chen because he couldn't offer her more money. T口 F口4 Chen took out a large loan to cure her daughter, T口 F口5 Wang set up a fundraising website for Chen's daughter after Chen told him about her situation. T口 F口Step 5:After listening, discuss the questions.1 What kind of person do you think Chen Liyan is?Chen Liyan is generous and honest because she returned a large sum of money to the owner.2 Did Chen return the money because she didn't need it?No. She returned the money because it was the right thing to do. Evidence for this is that she refused to accept the reward money because she felt that it had not been earned. 3 Is it common for people to do what Chen did?It depends on the culture. In some countries it is quite common to return money that has been found. In other countries, people believe "Finders are keepers!" 4 How did Wang Zheng feel about the return of his money?He must have been very happy and relieved to have gotten his money back. We know this because he thanked Chen repeatedly and even offered her a reward.5 Why did Ma Dongbao tell Wang about Chen's family?He must have had great sympathy for Chen and her daughter and wanted to help them.'We know this because he arranged help for them. 6 How did the news reporter feel about Chen's actions?The news reporter felt that it showed that money wasn't the most important thing in life. We know this because the reporter told us that this is what Chen believes. and then said, “that's a great attitude to take."

  • 新人教版高中英語必修3Unit 5 The Value of Money-Reading for Writing教學設計二

    新人教版高中英語必修3Unit 5 The Value of Money-Reading for Writing教學設計二

    2. 您能看到, 我頭發(fā)太長了。You can see that my hair is much too long.3. 無論什么時候, 只要您想回來就回來。Please come back whenever you want.4. 您僅有很少的頭發(fā)要理! You only have too little hair to cut !5. 為您服務是我的榮幸!It is my honour to serve you!Step 9 Writing(Henry is walking down the street when he sees a sign for a place that cuts hair. He decides to have it cut. )H=Henry B=BarberH: Good afternoon, I’d like to have my hair cut, if I may. (The barber looks at Henry’s hair and continues cutting another man’s hair. ) Er, I’d really like a haircut. As you can see it’s much too long. B: (in a rude manner) Yes, I can see that. Indeed, I can. H: Fine, well, I’ll have a seat then. (He sits in one of the barber’s chairs. The barber turns to look at Henry. )B: It’s quite expensive here, you know! Are you sure you can afford it?H: Yes. I think so. (After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B: Why Mr. . . (looks shocked)H: Adams. Henry Adams. I’m sorry. I don’t have any change. B: Please don’t worry! (wearing a big smile) Nothing to worry about! Nothing at all! Please come back whenever you want, even if you only have too little hair to cut! It will be my honour to serve you!Step 10 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Are all the elements of a play included and in good order ?2. Do the character use suitable language ?3. Are the stage directions clear and useful ?4. Is the plot clear and exciting enough ?

  • 人教版高中地理必修1第三章第三節(jié)水資源的合理利用教案

    人教版高中地理必修1第三章第三節(jié)水資源的合理利用教案

    5、請列舉開源的措施。(包括合理開發(fā)和提取地下水;修筑水庫;開渠引水實行跨流域調(diào)水;海水淡化;人工增雨等。6、開源“五水”歌:開發(fā)地下水、蓄積洪水,跨流域調(diào)水,淡水海水,人增雨水。能馬上背出來嗎?7、請列舉節(jié)流的措施。(包括加強宣傳教育,提高公民節(jié)水意識;重視改進農(nóng)業(yè)灌溉技術(shù),提高工業(yè)用水的重復利用率等。)8、水資源時刻影響著我們的生存和發(fā)展,盡管我們已經(jīng)學習了關(guān)于如何合理利用水資源的知識,但關(guān)鍵還是要研究問題和解決問題,面對復雜的生活環(huán)境,具體問題要具體分析,看課本70頁“活動”,請小組派代表回答問題。提示:(1)西北地區(qū)的水資源供給,從可持續(xù)發(fā)展的角度,解決水資源的供求矛盾應體現(xiàn)在:控制人口數(shù)量,減少用水規(guī)模;發(fā)展節(jié)水農(nóng)業(yè);保護生態(tài)環(huán)境,退耕還林還草。(2)我國缺水問題,談談看法:通過電視、報紙雜志、互聯(lián)網(wǎng)收集有關(guān)水資源的資料;確定綜合思維、立體思維的方法,全面多角度地尋找解決缺水的對策。

  • 人教版高中地理必修1第二章第三節(jié)常見的天氣系統(tǒng)教案

    人教版高中地理必修1第二章第三節(jié)常見的天氣系統(tǒng)教案

    一、知識和技能1.了解鋒面系統(tǒng)、低壓系統(tǒng)、高壓系統(tǒng)的特點2.理解氣旋與反氣旋的形成過程、氣流運動特點,掌握氣旋、反氣旋氣流運動的規(guī)律性3.使學生掌握氣旋和反氣旋控制下的天氣狀況二、過程和方法1.掌握各天氣系統(tǒng)活動規(guī)律和處在不同天氣系統(tǒng)及其不同部位的天氣特點,利用天氣圖進行天氣形勢分析預報2.能夠說明這些天氣系統(tǒng)是如何對所到達地區(qū)的天氣產(chǎn)生影響的,能夠結(jié)合當?shù)厍闆r分析學校所在地曾經(jīng)發(fā)生的災害性天氣及其影響下的天氣系統(tǒng)3.通過研究氣旋和反氣旋的形成過程,使學生初步具備研究問題的方法與步驟4.通過對冷鋒與暖鋒天氣系統(tǒng)的對比分析來實現(xiàn)學生地理綜合分析能力的提高。通過對鋒面氣旋的分析來建立地理空間思維的習慣三、情感、態(tài)度、價值觀1.通過本節(jié)課學習,讓學生懂得學科學、愛科學,獻身氣象事業(yè),為“四化”建設服務

  • 人教版高中地理必修1第四章第二節(jié)山岳的形成教案

    人教版高中地理必修1第四章第二節(jié)山岳的形成教案

    一、明確課標要求1.了解褶皺的概念和褶皺的基本形態(tài);2.了解褶皺山的形成和褶皺山的基本形態(tài)特征;3.能夠在不同的示意圖中識別和判讀背斜與向斜;4.知道和理解斷層的概念和斷塊山的形成,了解斷塊山的基本形態(tài)特征;5.知道火山的形成、結(jié)構(gòu)和規(guī)模。二、教學目標知識目標:1.結(jié)合具體圖像,了解褶皺山的形成及基本形態(tài)特征。2.能在示意圖上識別和判斷背斜和向斜。3.理解內(nèi)外力共同作用下形成的“背斜成谷,向斜成山”,并能夠明白其形成的原因。4.能夠結(jié)合實例,理解斷塊山的形成及基本特征。5.知道火山的形成、結(jié)構(gòu)和規(guī)模。過程與方法目標:1.結(jié)合實例,分析造成地表形態(tài)變化的內(nèi)力、外力因素。2.通過案例,嘗試聯(lián)系實際,培養(yǎng)動手演示、判讀圖像、比較、分析、歸納的能力。

  • 人教版高中地理必修1第五章第二節(jié)自然地理環(huán)境的差異性教案

    人教版高中地理必修1第五章第二節(jié)自然地理環(huán)境的差異性教案

    【補充說明】我們這節(jié)課簡要地分析了陸地環(huán)境的三種地域分異規(guī)律。實際上,世界上的任何事物有其一般性,也有它的特 殊性。在地帶性分異規(guī)律的基礎上,陸地環(huán)境因為受到海陸分布、地形 起伏等因素的影響,也會出現(xiàn)一些不規(guī)律的現(xiàn)象,這種現(xiàn)象稱為非地帶性。例如,我們在初中地理中學過綠洲。還記得什么叫綠洲嗎?再比如,在南美洲的西海岸(太平洋沿岸),有一條狹長的(熱帶)荒漠帶,而缺少熱帶草原帶,熱帶雨林帶主要是分布在赤道以北地區(qū)。這主要是受大的地形起伏的影響。因為南美洲西部是一列高大的安第斯山脈,受其影響,兩邊的氣候狀況不同,所以就出現(xiàn)了分布規(guī)律不同的自然帶,這也是一種非地帶性現(xiàn)象?!究偨Y(jié)】有規(guī)律分布的自然帶構(gòu)成了全球和諧的自然環(huán)境整體。自然帶之間錯綜復雜的、微妙的要素關(guān)系,有許多是人類還沒有認識到的。因此,人類不能隨意去破壞任何哪怕是極微小的環(huán)節(jié),也許它 帶來的影響會是全球性的。保護全球環(huán)境,人人有責。

  • 人教版高中地理必修1第一章第四節(jié)地球的圖層結(jié)構(gòu)教案

    人教版高中地理必修1第一章第四節(jié)地球的圖層結(jié)構(gòu)教案

    一、知識和技能1.使學生了解地球的圈層構(gòu)造,初步掌握地球內(nèi)部圈層的組成和劃分依據(jù)2.使學生了解各內(nèi)部圈層的界限、厚度、物理性狀等。二、過程和方法1.使學生了解研究地球內(nèi)部構(gòu)造的方法,從而認識人類對未知事物所進行的探索實踐,激發(fā)同學們學科學、愛科學的興趣及責任感。2.了解地球內(nèi)部圈層劃分實況及各層主要特點,從宏觀上認識全球的整體面貌,形成地球系統(tǒng)觀念。3.通過歸納、總結(jié)、對比地球內(nèi)部各層的特點,對學生進行綜合歸納等思維能力的培養(yǎng)和訓練。三、情感、態(tài)度、價值觀通過學習對學生進行熱愛自然、熱愛科學的教育,鼓勵學生獻身于科學教育事業(yè)?!窘虒W重點】1.地震波的波速及傳播特點,區(qū)別橫波與縱波。2.地球內(nèi)部圈層劃分實況及各層主要特點,特別是地殼的特點。3.巖石圈概念,軟流層知識。

  • 人教版高中地理必修1自然地理環(huán)境的整體性教案

    人教版高中地理必修1自然地理環(huán)境的整體性教案

    1.生產(chǎn)功能:合成有機物的能力2.平衡功能:使自然地理要素的性質(zhì)保持穩(wěn)定的能力【教師講解】生產(chǎn)功能主要依賴于光合作用。在光合作用過程中,植物提供葉綠素,大氣提供熱量和二氧化碳,土壤及水圈、巖石圈提供水分及無機鹽。光合作用通過物質(zhì)和能量的交換,將生物、大氣、水、土壤、巖石等地理要素統(tǒng)一在一起,在一定的條件下,生產(chǎn)出有機物。由此可見,生產(chǎn)功能是自然環(huán)境的整體功能而非單個地理要素的功能。大氣本身不具有減緩二氧化碳增加的功能,但是,在自然地理環(huán)境中,通過各地理要素的相互作用,卻能消除部分新增的二氧化碳的能力,既為自然地理環(huán)境的平衡功能。請大家閱讀教材P94活動,利用平衡功能的原理,解釋一定范圍內(nèi)各物種的數(shù)量基本恒定這一現(xiàn)象?!緦W生討論回答】略。(可參考教參)【轉(zhuǎn)折】自然地理環(huán)境各要素每時每刻都在演化,如我們熟知的氣候變化、地貌變化等。各個要素的發(fā)展演化是統(tǒng)一的,一個要素的演化伴隨著其他各個要素的演化。

  • 人教版高中地理必修3第三章第一節(jié)能源資源的開發(fā)教案

    人教版高中地理必修3第三章第一節(jié)能源資源的開發(fā)教案

    山西省總結(jié)出了許多重點工礦區(qū)的生態(tài)環(huán)境建設模式,即圍繞煤田的露天開采區(qū)、居民點和主要交通線建設區(qū),通過工程及生物措施,結(jié)合土地的復墾,充分利用廠礦的人力、財力和科技優(yōu)勢,建立集約經(jīng)營的高效蔬菜、水果及肉蛋奶生產(chǎn)基地(圖3.13)。1.說一說圖中各種工程及生物措施的作用。點撥:參考圖3.13圖中各工程及措施的作用:(1)隔離護壩:主要作用是將采掘區(qū)與河流隔開,以免河水流入采掘區(qū)。(2)排水溝:主要作用是引開可能進入采掘區(qū)的雨水或其他水源。(3)公路緊靠采掘區(qū),方便運輸車輛就近從工地上公路。(4)“固沙草方格”,即在流沙表面用麥草、稻草扎成1×1米的草方格,使流沙不易被風 吹起,達到阻沙、固沙的目的,并在草方格上栽種沙蒿、花棒、籽蒿、擰條等沙生植物,建立起旱生植物帶,營造擋沙樹林。

  • 人教版高中地理必修3第四章第二節(jié)區(qū)域工業(yè)化與城市化教案

    人教版高中地理必修3第四章第二節(jié)區(qū)域工業(yè)化與城市化教案

    從右圖“進出口貿(mào)易占全國的比重”可看出,珠三角地區(qū)的外向型經(jīng)濟特征很明顯,但正在緩慢的發(fā)生轉(zhuǎn)變;而長三角地區(qū)的外貿(mào)依存度在10年內(nèi)迅速增長。由此可見,珠三角地區(qū)城市化過程,是伴隨著該地特殊的經(jīng)濟發(fā)展相對自發(fā)地快速推進,缺乏宏觀而理性的規(guī)劃。閱讀通過此閱讀材料,使學生大致了解以下內(nèi)容深圳作為珠江三角洲地區(qū)迅速城市化的一個典型代表,到目前為止,對其未來發(fā)展道路的構(gòu)想,主要集中在:如何聯(lián)合和依托臨近區(qū)域、聯(lián)合優(yōu)勢資源,擴大發(fā)展空間;如何明確功能,重新定位,合理分工,突出特色?;顒娱L江三角洲地區(qū)城市的協(xié)調(diào)發(fā)展1.讀圖4.28,如果按人口規(guī)模>500萬人、100萬~500萬人、50萬~100萬人、20萬~50萬人和<20萬人將城市分為五級的話,分析長江三角洲地區(qū)城市的等級規(guī)模結(jié)構(gòu)是否合理,這對其城市的協(xié)調(diào)發(fā)展有何影響?

  • 人教版高中地理必修3第五章第二節(jié)產(chǎn)業(yè)轉(zhuǎn)移教案

    人教版高中地理必修3第五章第二節(jié)產(chǎn)業(yè)轉(zhuǎn)移教案

    1.閱讀圖5.16,說明產(chǎn)業(yè)向國外轉(zhuǎn)移對日本經(jīng)濟的不利影響。點撥:圖5.16直觀的顯示了產(chǎn)業(yè)轉(zhuǎn)移對日本經(jīng)濟的不利影響:形成“產(chǎn)業(yè)轉(zhuǎn)移出去的多,轉(zhuǎn)移進來的少→國內(nèi)生產(chǎn)投資不足,生產(chǎn)困難→市場萎縮→產(chǎn)業(yè)向外轉(zhuǎn)移,外資不愿進入”的惡性循環(huán)。2.盡管重化工業(yè)的環(huán)境污染比較嚴重,但是卻能為工業(yè)化的發(fā)展提供堅實的基礎,因此成為發(fā)達工業(yè)的象征。日本、韓國的經(jīng)濟發(fā)展都經(jīng)歷了由輕工業(yè)(勞動密集型)到重化工業(yè)(資源密集型和資金密集型)到高科技工業(yè)(技術(shù)密集型)的階段。(1)為什么日本、韓國在重點發(fā)展重化工業(yè)之前,要先發(fā)展勞動密集型工業(yè)?點撥:重化工業(yè)的發(fā)展一方面需要有一定的工業(yè)基礎和技術(shù)工人,另一方面需要投入大量的資金,先發(fā)展勞動密集型工業(yè)有利于利用勞動力資源豐富且廉價的優(yōu)勢,積累資金和造就產(chǎn)業(yè)工人。所以,勞動力豐富的發(fā)展中國家或地區(qū)的工業(yè)化往往從優(yōu)先發(fā)展勞動密集型工業(yè)開始。

  • 人教版高中數(shù)學選擇性必修二等比數(shù)列的概念 (1) 教學設計

    人教版高中數(shù)學選擇性必修二等比數(shù)列的概念 (1) 教學設計

    新知探究我們知道,等差數(shù)列的特征是“從第2項起,每一項與它的前一項的差都等于同一個常數(shù)” 。類比等差數(shù)列的研究思路和方法,從運算的角度出發(fā),你覺得還有怎樣的數(shù)列是值得研究的?1.兩河流域發(fā)掘的古巴比倫時期的泥版上記錄了下面的數(shù)列:9,9^2,9^3,…,9^10; ①100,100^2,100^3,…,100^10; ②5,5^2,5^3,…,5^10. ③2.《莊子·天下》中提到:“一尺之錘,日取其半,萬世不竭.”如果把“一尺之錘”的長度看成單位“1”,那么從第1天開始,每天得到的“錘”的長度依次是1/2,1/4,1/8,1/16,1/32,… ④3.在營養(yǎng)和生存空間沒有限制的情況下,某種細菌每20 min 就通過分裂繁殖一代,那么一個這種細菌從第1次分裂開始,各次分裂產(chǎn)生的后代個數(shù)依次是2,4,8,16,32,64,… ⑤4.某人存入銀行a元,存期為5年,年利率為 r ,那么按照復利,他5年內(nèi)每年末得到的本利和分別是a(1+r),a〖(1+r)〗^2,a〖(1+r)〗^3,a〖(1+r)〗^4,a〖(1+r)〗^5 ⑥

  • 人教版高中數(shù)學選擇性必修二等差數(shù)列的前n項和公式(1)教學設計

    人教版高中數(shù)學選擇性必修二等差數(shù)列的前n項和公式(1)教學設計

    高斯(Gauss,1777-1855),德國數(shù)學家,近代數(shù)學的奠基者之一. 他在天文學、大地測量學、磁學、光學等領(lǐng)域都做出過杰出貢獻. 問題1:為什么1+100=2+99=…=50+51呢?這是巧合嗎?試從數(shù)列角度給出解釋.高斯的算法:(1+100)+(2+99)+…+(50+51)= 101×50=5050高斯的算法實際上解決了求等差數(shù)列:1,2,3,…,n,"… " 前100項的和問題.等差數(shù)列中,下標和相等的兩項和相等.設 an=n,則 a1=1,a2=2,a3=3,…如果數(shù)列{an} 是等差數(shù)列,p,q,s,t∈N*,且 p+q=s+t,則 ap+aq=as+at 可得:a_1+a_100=a_2+a_99=?=a_50+a_51問題2: 你能用上述方法計算1+2+3+… +101嗎?問題3: 你能計算1+2+3+… +n嗎?需要對項數(shù)的奇偶進行分類討論.當n為偶數(shù)時, S_n=(1+n)+[(2+(n-1)]+?+[(n/2+(n/2-1)]=(1+n)+(1+n)…+(1+n)=n/2 (1+n) =(n(1+n))/2當n為奇數(shù)數(shù)時, n-1為偶數(shù)

  • 人教版高中數(shù)學選擇性必修二變化率問題教學設計

    人教版高中數(shù)學選擇性必修二變化率問題教學設計

    導語在必修第一冊中,我們研究了函數(shù)的單調(diào)性,并利用函數(shù)單調(diào)性等知識,定性的研究了一次函數(shù)、指數(shù)函數(shù)、對數(shù)函數(shù)增長速度的差異,知道“對數(shù)增長” 是越來越慢的,“指數(shù)爆炸” 比“直線上升” 快得多,進一步的能否精確定量的刻畫變化速度的快慢呢,下面我們就來研究這個問題。新知探究問題1 高臺跳水運動員的速度高臺跳水運動中,運動員在運動過程中的重心相對于水面的高度h(單位:m)與起跳后的時間t(單位:s)存在函數(shù)關(guān)系h(t)=-4.9t2+4.8t+11.如何描述用運動員從起跳到入水的過程中運動的快慢程度呢?直覺告訴我們,運動員從起跳到入水的過程中,在上升階段運動的越來越慢,在下降階段運動的越來越快,我們可以把整個運動時間段分成許多小段,用運動員在每段時間內(nèi)的平均速度v ?近似的描述它的運動狀態(tài)。

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