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人教版高中歷史必修2發(fā)達(dá)的古代農(nóng)業(yè)教案2篇
（四）概括古代中國農(nóng)業(yè)經(jīng)濟的基本特點從歷史地位、生產(chǎn)結(jié)構(gòu)、基本特征、基本模式等幾方面，小組討論古代中國農(nóng)業(yè)經(jīng)濟的特點，然后展示。1、歷史地位：中國是獨立發(fā)展、自成體系的世界農(nóng)業(yè)起源中心之一。2、生產(chǎn)結(jié)構(gòu)：種植業(yè)和家畜飼養(yǎng)業(yè)相結(jié)合，以種植業(yè)為主，家畜飼養(yǎng)業(yè)為輔。3、基本特征：農(nóng)業(yè)生產(chǎn)精耕細(xì)作。 4、基本模式：一家一戶的小農(nóng)經(jīng)濟。知識拓展：當(dāng)今中國農(nóng)村人口膨脹，農(nóng)民生活條件急需提高，如何處理好“三農(nóng)”問題是中國社會走向和諧健康發(fā)展的重要課題，回顧中國古代農(nóng)業(yè)的發(fā)展歷程，結(jié)合農(nóng)業(yè)發(fā)展的現(xiàn)狀，談?wù)勀愕目捶ê徒ㄗh。展示：1.因地制宜，發(fā)揮各地特色優(yōu)勢2、精耕細(xì)作和現(xiàn)代科學(xué)相結(jié)合； 3.保護生態(tài)環(huán)境，堅持可持續(xù)發(fā)展；4.完善水利設(shè)施，政府重視。
人教版高中語文必修2《美的發(fā)現(xiàn)學(xué)習(xí)抒情》教案2篇
寫作指導(dǎo)：第一題要求寫出自然美，在自然美中融進(jìn)自己的感情。小路、流水、山巒、森林、天空、大?！际菍嶓w事物，因此首先要求用寫生的辦法把它們表現(xiàn)出來，要寫得準(zhǔn)確，寫出它們的特點和個性，尤其是寫出它們的美。同時，也要把贊美之情不落痕跡地融化在描寫之中。第二題是寫一幅風(fēng)景畫或一張風(fēng)景照片中的自然美景，以及美景中的一些細(xì)節(jié)，同時把自己心動的感覺寫出來。在這里，關(guān)鍵是找到畫或照片中的美，找到心動的感覺，如果找到了，再用文字把這美和感覺表達(dá)出來。當(dāng)然，寫風(fēng)景美和寫自己的感覺應(yīng)是乳水交融的。第三題是用動情的筆墨把自己的一種經(jīng)歷寫出來。這些經(jīng)歷似乎都是細(xì)節(jié)，都不是驚天動地的大事。是細(xì)節(jié)，就容易碰到，在題目列舉的四種中，學(xué)生不難找到。即使不在這四種中，也可以，只要這種經(jīng)歷給了自己心靈以震撼或潛移默化的影響。
人教版高中歷史必修2世界經(jīng)濟的區(qū)域集團化教案2篇
1、知識與能力：（1）了解歐洲聯(lián)盟的形成過程，剖析歐洲國家的一體化由經(jīng)濟實體向政治實體轉(zhuǎn)變的原因和實質(zhì)；（2）了解北美自由貿(mào)易區(qū)的形成過程，由北美自由貿(mào)易區(qū)的形成原因分析世界經(jīng)濟全球化與經(jīng)濟區(qū)域集團化之間的關(guān)系和影響。（3）了解亞太經(jīng)濟合作組織的形成過程，明確其特點及出現(xiàn)此特點的原因。掌握中國在加入該組織后所發(fā)揮的作用，并由此引申出中國在經(jīng)濟區(qū)域集團化過程中所發(fā)揮的作用。2、過程與方法：（1）通過學(xué)生對三大經(jīng)濟區(qū)域集團形成過程和特點的比較，鍛煉學(xué)生把具體的歷史現(xiàn)象與整體的社會背景聯(lián)系的能力，培養(yǎng)學(xué)生建立起全面的歷史觀。（2）通過對經(jīng)濟區(qū)域集團化趨勢的出現(xiàn)和它與經(jīng)濟全球化之間關(guān)系的分析，培養(yǎng)學(xué)生辨證的看問題，透過現(xiàn)象分析本質(zhì)的能力。
人教版高中地理必修2人口的數(shù)量變化精品教案
過渡：下面我們從時間角度分析世界人口數(shù)量變化的趨勢是怎樣的呢？為什么會這樣呢？板書：1、人口自然增長的時間變化（引導(dǎo)學(xué)生讀課本圖1.2和圖1.3，讓學(xué)生分析）教師首先讓學(xué)生說出閱讀地理曲線統(tǒng)計圖的一般步驟和方法，然后總結(jié)歸納：1、 讀圖名。2、 讀各個坐標(biāo)分別表示什么變量（兩圖橫坐標(biāo)均表示時間，縱坐標(biāo)均為相應(yīng)時期人口數(shù)）。3、 判讀圖形變化特征（兩圖中曲線曲率的變化反映對應(yīng)時段內(nèi)人口自然增長率的大?。?。4、 思考變量之間的因果關(guān)系（兩圖均反映不同歷史時期世界人口數(shù)量增長的不同特點）。問：世界人口數(shù)量變化的總趨勢是什么？（讓學(xué)生結(jié)合課本P2讀圖思考題，分析回答同時讓學(xué)生閱讀課本圖1.3，在圖1.2中找出圖1.3所在的時段，指導(dǎo)學(xué)生自學(xué)P3第一段，讓學(xué)生分析近100年全球人口快速增長的原因。最后師生共同歸納總結(jié)，填寫下表。）
人教版高中地理必修2人地關(guān)系思想的演變精品教案
生1：公平性原則——同代人之間要公平，代際之間、人類與其他生物種群之間、不同國家與地區(qū)之間也要公平。生2：持續(xù)性原則——地球的承載力是有限的，人類的經(jīng)濟活動和社會發(fā)展必須保持在資源和環(huán)境的承載力之內(nèi)。生3：共同性原則——發(fā)展經(jīng)濟和保護環(huán)境是全世界各國共同的任務(wù)，需要各國的共同參與。同時，地球作為一個整體，地區(qū)性問題往往會變?yōu)槿蛐詥栴}，所以地區(qū)的決策和行動，應(yīng)有助于實現(xiàn)全球整體的協(xié)調(diào)?；顒优c探究：2·閱讀下面一篇新聞報道，你認(rèn)為“給蛇讓道”有沒有必要?答：有必要·人類在森林區(qū)內(nèi)修筑公路，已經(jīng)侵占和破壞了蛇的生存環(huán)境，如果再不對蛇的遷移進(jìn)行保護，蛇數(shù)量的減少以至滅絕將不可避免。這種做法體現(xiàn)了可持續(xù)發(fā)展的公平性原則和共同性原則。3·用可持續(xù)發(fā)展的觀念作為衡量標(biāo)準(zhǔn)，對下列觀點作出評價。(1)人類有義務(wù)保護地球上所有的物種，人類的發(fā)展不應(yīng)該危及其他物種的生存。答：正確。符合可持續(xù)發(fā)展的公平性原則。
人教版高中地理必修2人口的空間變化精品教案
經(jīng)濟因素對人口遷移是主要的，經(jīng)常起作用的因素，是人口遷移的基本動因。通常情況下，經(jīng)濟發(fā)展水平的差異決定著人們遷移的方向，人們遷移是為了追求更好的就業(yè)機會和更高的經(jīng)濟收入。經(jīng)濟發(fā)展水平高的地區(qū)往往成為人口遷入地，人口的遷移量取決于遷入地對勞動力的需求狀況和遷出地人口相對過剩的狀況。師：20世紀(jì)80年代深圳、珠海等地設(shè)立了經(jīng)濟特區(qū)’吸I了大量的人口遷入。這又說明了什么問題? （生回答，師總結(jié)）從宏觀上看，經(jīng)濟布局也會造成大量的人口遷移。說明經(jīng)濟越發(fā)達(dá)，對人口的吸引力（即拉力）越大。經(jīng)濟發(fā)展水平、規(guī)模和速度決定著人口遷移的流向、流量和流速。師：交通和通訊又如何影響著人口的遷移呢?生：交通和通訊的發(fā)展，縮小了地區(qū)之間的距離，促進(jìn)了人口遷移。
人教版高中歷史必修1夏、商、西周的政治制度教案3篇
【大宗與小宗的關(guān)系：君臣關(guān)系、兄弟關(guān)系】4、影響：宗法制保證了貴族在政治上的壟斷和特權(quán)地位，也有利于統(tǒng)治集團內(nèi)部的穩(wěn)定和團結(jié)?！竞献魈骄俊糠址庵婆c宗法制的關(guān)系兩者互為表里、相輔相成：從根本上說，分封制就是宗法制作用于國家地方政治制度的重要舉措和體現(xiàn)。宗法制是分封制的內(nèi)核和紐帶，維護貴族統(tǒng)治集團內(nèi)部的穩(wěn)定與團結(jié)。宗法制與分封制結(jié)合緊密，宗法制是西周政治制度的基礎(chǔ)，分封制基于宗法制而產(chǎn)生，與宗法制互為表里。小結(jié)：我國早期政治制度（夏商周）發(fā)展脈絡(luò)：起源于夏——初步建立于夏商——完善于西周——瓦解于西周末年到春秋——崩潰于戰(zhàn)國★問題解答⊙【學(xué)思之窗】從這段記載，你能看出商朝的相權(quán)有多大嗎？答案提示：相是商朝中央最高官吏，相權(quán)很大，包括參定政制、主持政務(wù)、輔佐商王等，甚至有時可廢立商王。
新人教版高中英語必修1Unit 3 Sports and Fitness-Listening and Speaking & Listening and Talking教案
Finally, after finishing the task above, the teacher is expected to instruct students to work in groups to finish the following project:Speaking ProjectWhat event or activity would you like to invite your friend to? Make a conversation with a partner.Ski Race: Zhangjiakou, a beautiful city in northern China, will host the Youth Ski Race in December.Track Meet: a great event for track –and –field lovers on 26 October.Gym Class: come and work out at a gym! You can make it.Part 2: Listening and Talking:The teacher is advised to talk with their new students about the related topic: Boys and girls , what do you think of sportsmanship? Let’s listen and find out:Play the listening and match each opinion with the right speaker. Who do you agree with? Why?Cao Jing _____________ Lily _____________ Max _____________A. An athlete should do his/her best to win.B. The girl should stop and help the other girl. Good sportsmanship is more important than wining!C. An athlete should think about honor and his/her fans if he/she is competing for his/her country.Listen again and circle the expressions that you hear in the conversation.
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(xué)目標(biāo)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(xué)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(xué)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 1 Festivals and Celebrations-Listening &Speaking＆Talking教學(xué)設(shè)計
The theme of this section is “Talk about festival activities and festival experiences”.Festival and holiday is a relaxing and interesting topic for students. This part talks about the topic from the daily life of students’. In the part A ---Listening and Speaking, there are three conversations among different speakers from three countries(Japan, Rio and China), where the speakers are participating in or going to participate in the festivals and celebrations. So listening for the relationship among them is a fundamental task. Actually, with the globalization and more international communication, it is normal for Chinese or foreigners to witness different festivals and celebrations in or out of China. In the Conversation 1, a foreign reporter is interviewing a Japanese young girl who just had participated in the ceremony of the Coming-of-Age Day on the street and asking her feeling about the ceremony and the afterwards activities. Conversation 2, Chinese girl Li Mei is witnessing the Rio Carnival for the first time, and her friend Carla gives her some advice on the costumes which enables her to match with the carnival to have a good time. Conversation 3, a Chinese guide is showing a group of foreign visitors around the Lantern Festival and introducing the customs of the festival to them. The three conversations have a strong vitality and insert the festival and cultural elements from different countries. So perceiving the festivals and cultures from different countries is the second task. At the same time, the scripts also insert the targeted grammar --- v-ing as attributive and predicative, which students can perceive and experience in a real context and make a road for the further study. That is the third task. In the Part B--- Listening and Talking, the theme is “Talk about festival experience”, which is the common topic in our daily conversations. During the conversation, Song Lin, a Chinese student, asked Canadian friend Max about how to spend Christmas. In the conversation, Song Lin talked about experience and the feelings during the Chinese Spring Festival, during which there are not only some enjoyable things but some unpleasant things. After the listening, perhaps students find there are some similarities between Christmas and the Chinese Spring Festival as there are some differences in the origins and celebrations. For example, people always visit friends and relatives, decorate their houses, have a big dinner together, chat and give presents to each other.
新人教版高中英語必修3Unit 1 Festivals and Celebrations-Reading and Thinking教學(xué)設(shè)計
The topic of this part is “Discover the reasons for festivals and celebrations.The Listening & Speaking & Talking part aims at talking about the experiences and feelings or emotions about the festivals and celebrations. This section aims at detecting the reason why the people celebrate the festivals, the time, the places, the types and the way of celebrations. It also explains why some traditions in the old celebrations are disappearing, like the firecrackers in the big cities and some new things are appearing like the prosperity of business or commerce. 1. Students can talk about what festivals they know and the reasons and the way of celebrating them.2. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.3. Students can understand the past, the present situation of some festival around the world and why there are some changes about them. 4. Students can have the international awareness about the festivals.1. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.2. Students can understand the past, the present situation of some festival around the world and why there are some changes about them.Step 1 Lead in---Small talkWhat festival do you like best ? Why ?I like the Spring Festivals because I can set off the fireworks, receive the lucky money and enjoy the Gala with my families.Step 2 Before reading---Pair workWhy do people celebrate different festivals ?The Spring Festivals is to celebrate the end of winter and the coming of spring and new life.The Mid-autumn Day is to celebrate the harvest and admire the moon.
新人教版高中英語必修3Unit 1 Festivals and Celebrations-Reading for Writing教學(xué)設(shè)計一
The topic of this part is “Write about your festival experience”.During the Listening and Speaking and Talking, students are just asked to say out their festival experiences such as the Spring Festival, Mid-autumn Day, but this part students will be asked to write down their own festival experiences. During the reading part, it introduces the Naadam Festival in Inner Mongolia Autonomous Region, which can give students a good example to imitate. Students not only learn the festival, but touch and feel the Inner Mongolian’s character, the spirit and cultural atmosphere, which can help students form the cultural awareness and learn to enjoy and value the diversity of Chinese culture.Concretely, the dairy tells the experience that the author spent the Naadam Festival in Inner Mongolia Autonomous Region with his/her friend. The structure is clear. In the opening paragraph, it introduces the topic of the Naadam Festival and the whole feeling. Then it introduces the items of the festival like the ceremony, wrestling and horse racing. Finally, it summarizes this experience. Because this part is a travel journal, we must guide students pay more attention to these details: 1. use the first person. 2. use the past tense to tell the past thing and use the present or future tense to describe the scenery. 3. use the timeline to tell the development. 4. be careful for the author’s psychology, emotion and feeling, etc.1. Read quickly to get main idea; read carefully to get the detailed information about Naadam Festival.2. Learn the structure of the reading article and language.3. Write an article about a festival experience4. Learn to use the psychology, emotions and feeling in the writing.1. Write an article about a festival experience.2. Use the structure of the reading article and language.
新人教版高中英語必修3Unit 1 Festivals and celebrations-Discovering Useful Structure教學(xué)設(shè)計
4.That was an experience that frightened everyone. →That was _____________________. 答案：1. taking 2. being discussed 3. in the reading room 4. a frightening experienceStep 6 The meaning and function of V-ing as the predicative動詞-ing形式作表語，它通常位于系動詞后面，用以說明主語“是什么”或“怎么樣”一種表示主語的特質(zhì)、特征和狀態(tài), 其作用相當(dāng)于形容詞; 另一種具體說明主語的內(nèi)容, 即主語等同于表語, 兩者可互換。The music they are playing sounds so exciting. 他們演奏的音樂聽起來令人激動。The result is disappointing. 結(jié)果令人失望。Our job is playing all kinds of music. 我們的工作就是演奏各種音樂。Seeing is believing. 眼見為實。Step 7 Practice1. It is ________(amaze) that the boy is able to solve the problem so quickly.2. Buying a car is simply _______(waste) money. 3. Please stop making the noise—it’s getting ________(annoy). 4. complete the passage with the appropriate -ing form.La Tomatina is a festival that takes place in the Spanish town Bunol every August. I think many food festivals are __________ because people are just eating. however, this festival is _________ because people don't actually eat the tomatoes. Instead, they throw them at each other! the number of people ________ part in this tomato fight, can reach up to 20,000, and it is a very __________ fight that lasts for a whole hour. The _______ thing is how clean Bunol is after the tomatoes are washed away after the fight. this is because the juice form tomatoes is really good for making surfaces clean!答案：1. amazing 2. wasting 3. annoying4. boring interesting taking exciting amazing
人教版高中數(shù)學(xué)選擇性必修二等比數(shù)列的概念 (2) 教學(xué)設(shè)計
二、典例解析例4. 用 10 000元購買某個理財產(chǎn)品一年.（1）若以月利率0.400%的復(fù)利計息，12個月能獲得多少利息（精確到1元）？（2）若以季度復(fù)利計息，存4個季度，則當(dāng)每季度利率為多少時，按季結(jié)算的利息不少于按月結(jié)算的利息（精確到10^(-5)）？分析：復(fù)利是指把前一期的利息與本金之和算作本金，再計算下一期的利息.所以若原始本金為a元，每期的利率為r ，則從第一期開始，各期的本利和a , a(1+r)，a(1+r)^2…構(gòu)成等比數(shù)列.解：（1）設(shè)這筆錢存 n 個月以后的本利和組成一個數(shù)列{a_n }，則{a_n }是等比數(shù)列，首項a_1=10^4 (1+0.400%)，公比 q=1+0.400%，所以a_12=a_1 q^11 〖=10〗^4 (1+0.400%)^12≈10 490.7.所以，12個月后的利息為10 490.7-10^4≈491（元）.解：（2）設(shè)季度利率為 r ，這筆錢存 n 個季度以后的本利和組成一個數(shù)列{b_n }，則{b_n }也是一個等比數(shù)列，首項 b_1=10^4 (1+r)，公比為1+r，于是 b_4=10^4 (1+r)^4.
人教版高中數(shù)學(xué)選擇性必修二等比數(shù)列的前n項和公式 (2) 教學(xué)設(shè)計
二、典例解析例10. 如圖，正方形ABCD 的邊長為5cm ，取正方形ABCD 各邊的中點E,F,G,H, 作第2個正方形 EFGH，然后再取正方形EFGH各邊的中點I,J,K,L，作第3個正方形IJKL ，依此方法一直繼續(xù)下去. (1) 求從正方形ABCD 開始，連續(xù)10個正方形的面積之和；(2) 如果這個作圖過程可以一直繼續(xù)下去，那么所有這些正方形的面積之和將趨近于多少？分析：可以利用數(shù)列表示各正方形的面積，根據(jù)條件可知，這是一個等比數(shù)列。解：設(shè)正方形的面積為a_1，后續(xù)各正方形的面積依次為a_2, a_(3, ) 〖…,a〗_n,…，則a_1=25,由于第k+1個正方形的頂點分別是第k個正方形各邊的中點，所以a_(k+1)=〖1/2 a〗_k,因此{(lán)a_n}，是以25為首項，1/2為公比的等比數(shù)列.設(shè){a_n}的前項和為S_n（1）S_10=(25×[1-(1/2)^10 ] )/("1 " -1/2)=50×[1-(1/2)^10 ]=25575/512所以，前10個正方形的面積之和為25575/512cm^2.(2)當(dāng)無限增大時，無限趨近于所有正方形的面積和
人教版高中數(shù)學(xué)選擇性必修二等差數(shù)列的前n項和公式（2）教學(xué)設(shè)計
課前小測1．思考辨析(1)若Sn為等差數(shù)列{an}的前n項和，則數(shù)列Snn也是等差數(shù)列．( )(2)若a1>0，d<0，則等差數(shù)列中所有正項之和最大．( )(3)在等差數(shù)列中，Sn是其前n項和，則有S2n－1＝(2n－1)an.( )[答案] (1)√ (2)√ (3)√2．在項數(shù)為2n＋1的等差數(shù)列中，所有奇數(shù)項的和為165，所有偶數(shù)項的和為150，則n等于( )A．9 B．10 C．11 D．12B [∵S奇S偶＝n＋1n，∴165150＝n＋1n.∴n＝10.故選B項．]3．等差數(shù)列{an}中，S2＝4，S4＝9，則S6＝________.15 [由S2，S4－S2，S6－S4成等差數(shù)列得2(S4－S2)＝S2＋(S6－S4)解得S6＝15.]4．已知數(shù)列{an}的通項公式是an＝2n－48，則Sn取得最小值時，n為________.23或24 [由an≤0即2n－48≤0得n≤24.∴所有負(fù)項的和最小，即n＝23或24.]二、典例解析例8.某校新建一個報告廳，要求容納800個座位，報告廳共有20排座位，從第2排起后一排都比前一排多兩個座位. 問第1排應(yīng)安排多少個座位？分析：將第1排到第20排的座位數(shù)依次排成一列，構(gòu)成數(shù)列{an} ，設(shè)數(shù)列{an} 的前n項和為S_n。
人教版高中歷史必修2二戰(zhàn)后蘇聯(lián)的經(jīng)濟改革教案
⑤強調(diào)對外關(guān)系的靈活性。戈爾巴喬夫指出在對外政策中要采取多種辦法選擇不同的策略路線達(dá)到既定目標(biāo)。在外交談判中不要為自己制造死胡同，也不要給對方制造死胡同，要善于迎合伙伴，尋求接觸點。在這種思想指導(dǎo)下，蘇共采取的對外戰(zhàn)略是以軍控為中心的緩和戰(zhàn)略，具體政策是繼續(xù)與美國就裁軍、消減核武器、限制地區(qū)沖突等問題進(jìn)行談判，緩解蘇美關(guān)系；對西歐爭取建立“全歐大廈”；對東歐實行糾偏、不干涉政策；對中國改善關(guān)系，實現(xiàn)關(guān)系正?；徽{(diào)整與第三世界國家關(guān)系，解決阿富汗、柬埔寨等問題。 3、影響：①經(jīng)濟改革措施倉促上馬，缺少宏觀決策和相應(yīng)的配套措施；加上戈爾巴喬夫沒有放棄蘇聯(lián)的傳統(tǒng)做法，繼續(xù)優(yōu)先發(fā)展重工業(yè)，致使改革未達(dá)到預(yù)期的效果，蘇聯(lián)經(jīng)濟持續(xù)下滑②經(jīng)濟體制改革受挫后，把改革的重點轉(zhuǎn)向政治領(lǐng)域，最終導(dǎo)致國內(nèi)局勢的失控和蘇聯(lián)的解體。
人教版高中數(shù)學(xué)選擇性必修二等差數(shù)列的概念（2）教學(xué)設(shè)計
二、典例解析例3.某公司購置了一臺價值為220萬元的設(shè)備，隨著設(shè)備在使用過程中老化，其價值會逐年減少.經(jīng)驗表明，每經(jīng)過一年其價值會減少d(d為正常數(shù)）萬元.已知這臺設(shè)備的使用年限為10年，超過10年 ，它的價值將低于購進(jìn)價值的5%，設(shè)備將報廢.請確定d的范圍.分析：該設(shè)備使用n年后的價值構(gòu)成數(shù)列{an}，由題意可知，an＝an－1－d (n≥2). 即：an－an－1＝－d.所以{an}為公差為－d的等差數(shù)列.10年之內(nèi)（含10年），該設(shè)備的價值不小于（220×5%=）11萬元；10年后，該設(shè)備的價值需小于11萬元．利用{an}的通項公式列不等式求解．解：設(shè)使用n年后，這臺設(shè)備的價值為an萬元，則可得數(shù)列{an}．由已知條件，得an＝an－1－d（n≥2）．所以數(shù)列{an}是一個公差為－d的等差數(shù)列.因為a1＝220－d，所以an＝220－d＋(n－1)(－d)＝220－nd. 由題意，得a10≥11，a11＜11. 即：{█("220－10d≥11" @"220－11d＜11" )┤解得19<d≤20.9所以，d的求值范圍為19<d≤20.9
人教版高中政治必修2民主管理：共創(chuàng)幸福生活教案
教師活動：請同學(xué)們閱讀教材P26頁圖表，思考所提的問題。學(xué)生活動：閱讀課本，積極思考。教師點評：公民應(yīng)在本地事務(wù)中增強主人翁責(zé)任感，積極參與民主管理。在參與民主管理的過程中，學(xué)習(xí)民主管理的知識和技能，體驗民主管理的意義和價值，逐步增強和提高自己政治參與的責(zé)任意識和實際本領(lǐng)。2、青年學(xué)生應(yīng)積極參與民主管理青年學(xué)生應(yīng)著眼于未來發(fā)展，積極參與民主管理。在基層民主自治這種最廣泛的民主實踐中，獲得更多民主管理機會，以不同方式嘗試參與參與民主管理活動。在參與民主管理的過程中，學(xué)習(xí)民主管理的知識和技能，體驗民主管理的意義和價值，逐步增強和提高自己政治參與的責(zé)任意識和實際本領(lǐng)。（三）課堂總結(jié)、點評本節(jié)內(nèi)容講述了我國的基層民主管理形式和主要內(nèi)容，明確了積極參與基層民主管理的重要意義，這對我們提高自身政治素質(zhì)，增強參與政治生活的責(zé)任感和能力等，有重大作用。
人教版高中政治必修2民主選舉：投出理性的一票教案
教師活動：那種“選舉與我無關(guān)”，“選誰都可以”的想法，是公民意識不強、主人翁意識不強的表現(xiàn)。那么，怎樣才能行使好自己的選舉權(quán)呢？請同學(xué)們根據(jù)上面的學(xué)習(xí)，談?wù)勛约旱南敕āW(xué)生活動：思考討論教師點評：2、 如何行使好自己的選舉權(quán)（1）要不斷提高自己參與民主選舉的素養(yǎng)，端正參加選舉的態(tài)度，提高選舉能力，選出切實能代表人民利益的人。（2）要增強主人翁責(zé)任感和公民參與意識，積極參加選舉，認(rèn)真行使自己的選舉權(quán)。（3）要不斷提高政治參與能力，在理性判斷基礎(chǔ)上，鄭重投出自己的一票。（三）課堂總結(jié)、點評本節(jié)內(nèi)容講述了我國的選舉方式以及如何珍惜自己的選舉權(quán)利的有關(guān)知識，懂得我國是人民民主專政的社會主義國家，人民當(dāng)家作主，應(yīng)該增強主人翁責(zé)任感，自覺珍惜并運用好選舉權(quán)，以促進(jìn)我國的民主政治建設(shè)，維護人民的根本利益。
