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新人教版高中英語(yǔ)選修2Unit 2 Reading and thinking教學(xué)設(shè)計(jì)
Her tutor told her to acknowledge __________ other people had said if she cited their ideas, and advised her _______（read） lots of information in order to form __________wise opinion of her own.Now halfway __________ her exchange year, Xie Lei felt much more at home in the UK. She said __________ (engage) in British culture had helped and that she had been__________ (involve) in social activities. She also said while learning about business, she was acting as a cultural messenger __________（build） a bridge between the two countries. keys:Xie Lei, a 19yearold Chinese student, said goodbye to her family and friends in China and boarded (board) a plane for London six months ago in order to get a business qualification. She was ambitious(ambition) to set up a business after graduation. It was the first time that she had left (leave) home.At first, Xie Lei had to adapt to life in a different country. She chose to live with a host family, who can help with her adaptation (adapt) to the new culture. When she missed home, she felt comforted (comfort) to have a second family. Also Xie Lei had to satisfy academic requirements. Her tutor told her to acknowledge what other people had said if she cited their ideas, and advised her to read lots of information in order to form a wise opinion of her own.Now halfway through her exchange year, Xie Lei felt much more at home in the UK. She said engaging (engage) in British culture had helped and that she had been involved (involve) in social activities. She also said while learning about business, she was acting as a cultural messenger building a bridge between the two countries.
新人教版高中英語(yǔ)選修2Unit 2 Reading for writing教學(xué)設(shè)計(jì)
The theme of this section is to express people's views on studying abroad. With the continuous development of Chinese economic construction, especially the general improvement of people's living standards, the number of Chinese students studying abroad at their own expense is on the rise. Many students and parents turn their attention to the world and regard studying abroad as an effective way to improve their quality, broaden their horizons and master the world's advanced scientific knowledge, which is very important for the fever of going abroad. Studying abroad is also an important decision made by a family for their children. Therefore, it is of great social significance to discuss this issue. The theme of this section is the column discussion in the newspaper: the advantages and disadvantages of studying abroad. The discourse is about two parents' contribution letters on this issue. They respectively express their own positions. One thinks that the disadvantages outweigh the advantages, and the other thinks that the advantages outweigh the disadvantages. The two parents' arguments are well founded and logical. It is worth noting that the two authors do not express their views on studying abroad from an individual point of view, but from a national or even global point of view. These two articles have the characteristics of both letters and argumentative essays1.Guide the students to read these two articles, and understand the author's point of view and argument ideas2.Help the students to summarize the structure and writing methods of argumentative writing, and guides students to correctly understand the advantages and disadvantages of studying abroad3.Cultivate students' ability to analyze problems objectively, comprehensively and deeply
新人教版高中英語(yǔ)選修2Unit 2 Using langauge-Listening教學(xué)設(shè)計(jì)
? B: Absolutely! Getting involved with Chinese cultural activities there definitely helped a lot. I got to practice my Chinese on a daily basis, and I could learn how native Chinese speakers spoke.? A: What do you feel is your biggest achievement?? B: Learning Chinese characters! I have learnt about 1,500 so far. When I first started, I didn't think it was even going to be possible to learn so many, but now I find that I can read signs, menus, and even some easy newspaper articles.? A: What are you most keen on?? B: I've really become keen on learning more about the Chinese culture, in particular Chinese calligraphy. As I have learnt Chinese characters, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way. ? A: Finally, what do you want to say to anyone interested in learning Chinese?? I have really become keen on learning more about the Chinese culture, in particular Chinese Calligraphy. As I have learnt Chinese character, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way.? A: Finally, what do you want to say to anyone interested in learning Chinese?? B: I'd say, give it a shot! While some aspects may be difficult, it is quite rewarding and you will be happy that you tried.? A: Thanks for your time. ? B:You're welcome.
新人教版高中英語(yǔ)選修2Unit 4 Learning about Language教學(xué)設(shè)計(jì)
This section guides students to pay attention to the typical context of vocabulary use, helps students accumulate vocabulary around the key vocabulary of this unit, and uses the learned words and word chunks in different contexts to deeply understand their meaning and usage, so as to achieve the purpose of review and consolidation.The teaching design activities aim to guide students to pay attention to the typical context in which the target vocabulary is used, as well as the common vocabulary used in collocation, so that students can complete the sentence with correct words. In terms of vocabulary learning strategies, this unit focuses on cultivating students' ability to pay attention to collocation of words and to use word blocks to express meaning.For vocabulary learning, it is not enough just to know the meaning of a single word, but the most important thing is to master the common collocations of words, namely word blocks.Teachers should timely guide students to summarize common vocabulary collocation, such as verb and noun collocation, verb and preposition collocation, preposition and noun collocation, and so on.1. Guide students to understand and consolidate the meaning and usage of the vocabulary in the context, 2. Guide the students to use the unit topic vocabulary in a richer context3. Let the students sort out and accumulate the accumulated vocabulary, establishes the semantic connection between the vocabulary,4. Enable students to understand and master the vocabulary more effectivelyGuiding the Ss to use unit topic words and the sentence patterns in a richer context.
新人教版高中英語(yǔ)選修2Unit 4 Reading for writing教學(xué)設(shè)計(jì)
假定你是英國(guó)的Jack，打算來(lái)中國(guó)旅行，請(qǐng)你給你的中國(guó)筆友李華寫(xiě)一封信，要點(diǎn)如下：1．你的旅行計(jì)劃：北京→泰山→杭州；2．征求建議并詢(xún)問(wèn)他是否愿意充當(dāng)你的導(dǎo)游。注意：1.詞數(shù)80左右(開(kāi)頭和結(jié)尾已給出，不計(jì)入總詞數(shù))；2．可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。參考詞匯：故宮 the Forbidden City；泰山 Mount TaiDear Li Hua，I'm glad to tell you that 'm going to visit China.First，I am planning to visit Beijing，the capitalof China，where I am looking forward to enjoying the Great Wall，the Forbidden City and somebeautiful parks.Then I intend to go to visit Mount Tai in Shandong Province.I've heard that it is one ofthe most famous mountains in China and I can't wait to enjoy the amazing sunrise there.After that，I amalso going to Hangzhou.It is said that it is a beautiful modern city with breathtaking natural sights，among which the West Lake is a well- known tourist attraction.What do you think of my travel plan? Will you act as my guide? Hope to hear from you soon.
新人教版高中英語(yǔ)選修2Unit 4 Using langauge-Listening教學(xué)設(shè)計(jì)
The theme of the listening section is " talking about scenery and culture along a journey."The part is designed to further lead the students to understand Canadian natural geography and social environment, and integrated into the cultural contrast by mentioning the long train journey from Beijing to Moscow routes. On this basis, the part activates students related travel experience, lets the student serial dialogue, guides the student to explore further the pleasure and meaning of the long journey, and Chinese and foreign cultural comparison.The part also provides a framework for the continuation of the dialogue, which is designed to provide a framework for students to successfully complete their oral expressions, and to incorporate an important trading strategy to end the dialogue naturally.1. Help students to understand and master some common English idioms in the context, and experience the expression effect of English idioms.2. Guide the students to understand the identity of different people in the listening context, and finish the dialogue according to their own experience.3. Instruct the students to use appropriate language to express surprise and curiosity about space and place in the dialogue, and master the oral strategy of ending the dialogue naturally.1. Instruct students to grasp the key information and important details of the dialogue.2. Instruct students to conduct a similar talk on the relevant topic.
新人教版高中英語(yǔ)選修2Unit 5 Learning about Language教學(xué)設(shè)計(jì)
The purpose of this section of vocabulary exercises is to consolidate the key words in the first part of the reading text, let the students write the words according to the English definition, and focus on the detection of the meaning and spelling of the new words. The teaching design includes use English definition to explain words, which is conducive to improving students' interest in vocabulary learning, cultivating their sense of English language and thinking in English, and making students willing to use this method to better grasp the meaning of words, expand their vocabulary, and improve their ability of vocabulary application. Besides, the design offers more context including sentences and short passage for students to practice words flexibly.1. Guide students to understand and consolidate the meaning and usage of the vocabulary in the context, 2. Guide the students to use the unit topic vocabulary in a richer context3. Let the students sort out and accumulate the accumulated vocabulary, establishes the semantic connection between the vocabulary,4. Enable students to understand and master the vocabulary more effectivelyGuiding the Ss to use unit topic words and the sentence patterns in a richer context.Step1: Read the passage about chemical burns and fill in the blanks with the correct forms of the words in the box.
新人教版高中英語(yǔ)選修2Unit 5 Reading and thinking教學(xué)設(shè)計(jì)
The theme of this activity is to learn the first aid knowledge of burns. Burns is common in life, but there are some misunderstandings in manual treatment. This activity provides students with correct first aid methods, so as not to take them for granted in an emergency. This section guides students to analyze the causes of scald and help students avoid such things. From the perspective of text structure and collaborative features, the text is expository. Expository, with explanation as the main way of expression, transmits knowledge and information to readers by analyzing concepts and elaborating examples. This text arranges the information in logical order, clearly presents three parts of the content through the subtitle, accurately describes the causes, types, characteristics and first aid measures of burns, and some paragraphs use topic sentences to summarize the main idea, and the level is very clear.1. Guide students to understand the causes, types, characteristics and first aid methods of burns, through reading2. Enhance students’ ability to deal withburnss and their awareness of burns prevention3. Enable students to improve the ability to judge the types of texts accurately and to master the characteristics and writing techniques of expository texts.Guide students to understand the causes, types, characteristics and first aid methods of burns, through readingStep1: Lead in by discussing the related topic:1. What first-aid techniques do you know of ?CPR; mouth to mouth artificial respiration; the Heimlich Manoeuvre
新人教版高中英語(yǔ)選修2Unit 5 Using langauge-Listening教學(xué)設(shè)計(jì)
The theme of this section is to learn how to make emergency calls. Students should learn how to make emergency calls not only in China, but also in foreign countries in English, so that they can be prepared for future situations outside the home.The emergency telephone number is a vital hotline, which should be the most clear, rapid and effective communication with the acute operator.This section helps students to understand the emergency calls in some countries and the precautions for making emergency calls. Through the study of this section, students can accumulate common expressions and sentence patterns in this context. 1.Help students accumulate emergency telephone numbers in different countries and learn more about first aid2.Guide the students to understand the contents and instructions of the telephone, grasp the characteristics of the emergency telephone and the requirements of the emergency telephone.3.Guide students to understand the first aid instructions of the operators.4.Enable Ss to make simulated emergency calls with their partners in the language they have learned1. Instruct students to grasp the key information and important details of the dialogue.2. Instruct students to conduct a similar talk on the relevant topic.Step1:Look and discuss:Match the pictures below to the medical emergencies, and then discuss the questions in groups.
人教版高中地理選修1第三章第一節(jié)地球的早期演化和地質(zhì)年代教案
地質(zhì)年代可分為相對(duì)年代和絕 對(duì)年齡（或同位素年齡）兩種。相對(duì)地質(zhì)年代是指巖石和地層之間的相對(duì)新老關(guān)系和它們的時(shí)代順序。地質(zhì)學(xué)家和古生物學(xué)家根據(jù)地層自然形成的先后順序，將地層分為5代12紀(jì)。即早期的太古代和元古代（元古代 在中國(guó)含有1個(gè)震旦紀(jì)），以后的古生代、中生代和新生代。古生代分為寒武紀(jì)、奧陶紀(jì)、志留紀(jì)、泥盆紀(jì)、石炭紀(jì)和二疊紀(jì)，共7個(gè)紀(jì)；中生代分為三疊紀(jì)、侏羅紀(jì)和白堊紀(jì)，共3個(gè)紀(jì)；新生代只有第三紀(jì)、第四紀(jì)兩個(gè)紀(jì)。在各個(gè)不同時(shí)期的地層里，大都保存有古代動(dòng)、植物的標(biāo)準(zhǔn)化石。各類(lèi)動(dòng)、植物化石出現(xiàn)的早晚是有一定順序的，越是低等的，出現(xiàn)得越早，越是高等的，出現(xiàn)得越晚。絕對(duì)年齡是根據(jù)測(cè)出巖石中某種放射性元素及其蛻變產(chǎn)物的含量而計(jì)算出巖石的生成后距今的實(shí)際年 數(shù)。越是老的巖石，地層距今的年數(shù)越長(zhǎng)。
人教版高中地理選修2三峽工程對(duì)生態(tài)環(huán)境和名勝古跡的影響及對(duì)策教案
一、三峽工程的生態(tài)環(huán)境效應(yīng)三峽工程的生態(tài)環(huán)境效應(yīng)是指建設(shè)三峽工程對(duì)生態(tài)與環(huán)境的有利和不利影響。1、有利影響（1）防洪：（2）防治血吸蟲(chóng)?。海?）減輕洞庭湖淤積（4）增加枯水期流量，改善水（5）調(diào)節(jié)局部氣候：（6）減輕環(huán)境污染：綜上所述，三峽工程對(duì)生態(tài)環(huán)境的有利影響主要在中下游。2、不利影響及措施（1）淹沒(méi)土地、耕地：水庫(kù)蓄水將淹沒(méi)土地、耕地。（2）加劇水土流失和環(huán)境污染：在移民開(kāi)發(fā)和城市遷建過(guò)程中，處理不當(dāng)可能產(chǎn)生新的水土流失和環(huán)境污染等問(wèn)題。（3）誘發(fā)地質(zhì)災(zāi)害（地震、滑坡）：水庫(kù)蓄水改變了原有地應(yīng)力的平衡，可能誘發(fā)地震，并使庫(kù)岸發(fā)生滑坡等地質(zhì)災(zāi)害的可能性增大。（4）加重泥沙淤積：水庫(kù)蓄水，使庫(kù)區(qū)水流速度變慢，庫(kù)區(qū)和庫(kù)尾的泥沙淤積加重。
人教版高中數(shù)學(xué)選修3成對(duì)數(shù)據(jù)的相關(guān)關(guān)系教學(xué)設(shè)計(jì)
由樣本相關(guān)系數(shù)??≈0.97,可以推斷脂肪含量和年齡這兩個(gè)變量正線性相關(guān)，且相關(guān)程度很強(qiáng)。脂肪含量與年齡變化趨勢(shì)相同.歸納總結(jié)1．線性相關(guān)系數(shù)是從數(shù)值上來(lái)判斷變量間的線性相關(guān)程度，是定量的方法．與散點(diǎn)圖相比較，線性相關(guān)系數(shù)要精細(xì)得多，需要注意的是線性相關(guān)系數(shù)r的絕對(duì)值小，只是說(shuō)明線性相關(guān)程度低，但不一定不相關(guān)，可能是非線性相關(guān)．2．利用相關(guān)系數(shù)r來(lái)檢驗(yàn)線性相關(guān)顯著性水平時(shí)，通常與0.75作比較，若|r|>0.75，則線性相關(guān)較為顯著，否則不顯著．例2. 有人收集了某城市居民年收入(所有居民在一年內(nèi)收入的總和)與A商品銷(xiāo)售額的10年數(shù)據(jù),如表所示.畫(huà)出散點(diǎn)圖，判斷成對(duì)樣本數(shù)據(jù)是否線性相關(guān)，并通過(guò)樣本相關(guān)系數(shù)推斷居民年收入與A商品銷(xiāo)售額的相關(guān)程度和變化趨勢(shì)的異同.
人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量及其分布列(1)教學(xué)設(shè)計(jì)
4.寫(xiě)出下列隨機(jī)變量可能取的值，并說(shuō)明隨機(jī)變量所取的值表示的隨機(jī)試驗(yàn)的結(jié)果．(1)一個(gè)袋中裝有8個(gè)紅球，3個(gè)白球，從中任取5個(gè)球，其中所含白球的個(gè)數(shù)為X.(2)一個(gè)袋中有5個(gè)同樣大小的黑球，編號(hào)為1,2,3,4,5，從中任取3個(gè)球，取出的球的最大號(hào)碼記為X.(3). 在本例(1)條件下，規(guī)定取出一個(gè)紅球贏2元，而每取出一個(gè)白球輸1元，以ξ表示贏得的錢(qián)數(shù)，結(jié)果如何？[解] (1)X可取0,1,2,3.X＝0表示取5個(gè)球全是紅球；X＝1表示取1個(gè)白球，4個(gè)紅球；X＝2表示取2個(gè)白球，3個(gè)紅球；X＝3表示取3個(gè)白球，2個(gè)紅球．(2)X可取3,4,5.X＝3表示取出的球編號(hào)為1,2,3；X＝4表示取出的球編號(hào)為1,2,4；1,3,4或2,3,4.X＝5表示取出的球編號(hào)為1,2,5；1,3,5；1,4,5；2,3,5；2,4,5或3,4,5.(3) ξ＝10表示取5個(gè)球全是紅球；ξ＝7表示取1個(gè)白球，4個(gè)紅球；ξ＝4表示取2個(gè)白球，3個(gè)紅球；ξ＝1表示取3個(gè)白球，2個(gè)紅球．
人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量的方差教學(xué)設(shè)計(jì)
3.下結(jié)論.依據(jù)均值和方差做出結(jié)論.跟蹤訓(xùn)練2. A、B兩個(gè)投資項(xiàng)目的利潤(rùn)率分別為隨機(jī)變量X1和X2，根據(jù)市場(chǎng)分析， X1和X2的分布列分別為X1 2% 8% 12% X2 5% 10%P 0.2 0.5 0.3 P 0.8 0.2求：(1)在A、B兩個(gè)項(xiàng)目上各投資100萬(wàn)元， Y1和Y2分別表示投資項(xiàng)目A和B所獲得的利潤(rùn)，求方差D(Y1)和D(Y2)；(2)根據(jù)得到的結(jié)論，對(duì)于投資者有什么建議？ 解：(1)題目可知，投資項(xiàng)目A和B所獲得的利潤(rùn)Y1和Y2的分布列為：Y1 2 8 12 Y2 5 10P 0.2 0.5 0.3 P 0.8 0.2所以 ;; 解：(2) 由(1)可知 ，說(shuō)明投資A項(xiàng)目比投資B項(xiàng)目期望收益要高；同時(shí) ，說(shuō)明投資A項(xiàng)目比投資B項(xiàng)目的實(shí)際收益相對(duì)于期望收益的平均波動(dòng)要更大.因此，對(duì)于追求穩(wěn)定的投資者，投資B項(xiàng)目更合適;而對(duì)于更看重利潤(rùn)并且愿意為了高利潤(rùn)承擔(dān)風(fēng)險(xiǎn)的投資者，投資A項(xiàng)目更合適.
人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量及其分布列(2)教學(xué)設(shè)計(jì)
溫故知新 1.離散型隨機(jī)變量的定義可能取值為有限個(gè)或可以一一列舉的隨機(jī)變量,我們稱(chēng)為離散型隨機(jī)變量.通常用大寫(xiě)英文字母表示隨機(jī)變量,例如X,Y,Z;用小寫(xiě)英文字母表示隨機(jī)變量的取值,例如x,y,z.隨機(jī)變量的特點(diǎn): 試驗(yàn)之前可以判斷其可能出現(xiàn)的所有值，在試驗(yàn)之前不可能確定取何值；可以用數(shù)字表示2、隨機(jī)變量的分類(lèi)①離散型隨機(jī)變量:X的取值可一、一列出；②連續(xù)型隨機(jī)變量:X可以取某個(gè)區(qū)間內(nèi)的一切值隨機(jī)變量將隨機(jī)事件的結(jié)果數(shù)量化．3、古典概型:①試驗(yàn)中所有可能出現(xiàn)的基本事件只有有限個(gè)；②每個(gè)基本事件出現(xiàn)的可能性相等。二、探究新知探究1.拋擲一枚骰子,所得的點(diǎn)數(shù)X有哪些值？取每個(gè)值的概率是多少？ 因?yàn)閄取值范圍是{1，2，3，4，5，6}而且"P(X=m)"=1/6,m=1,2,3,4,5,6.因此X分布列如下表所示
人教版高中數(shù)學(xué)選修3一元線性回歸模型及其應(yīng)用教學(xué)設(shè)計(jì)
1.確定研究對(duì)象，明確哪個(gè)是解釋變量，哪個(gè)是響應(yīng)變量；2.由經(jīng)驗(yàn)確定非線性經(jīng)驗(yàn)回歸方程的模型；3.通過(guò)變換，將非線性經(jīng)驗(yàn)回歸模型轉(zhuǎn)化為線性經(jīng)驗(yàn)回歸模型；4.按照公式計(jì)算經(jīng)驗(yàn)回歸方程中的參數(shù)，得到經(jīng)驗(yàn)回歸方程；5.消去新元，得到非線性經(jīng)驗(yàn)回歸方程；6.得出結(jié)果后分析殘差圖是否有異常 ．跟蹤訓(xùn)練1.一只藥用昆蟲(chóng)的產(chǎn)卵數(shù)y與一定范圍內(nèi)的溫度x有關(guān)，現(xiàn)收集了6組觀測(cè)數(shù)據(jù)列于表中： 經(jīng)計(jì)算得： 線性回歸殘差的平方和: ∑_(i=1)^6?〖(y_i-(y_i ) ?)〗^2=236,64,e^8.0605≈3167.其中 分別為觀測(cè)數(shù)據(jù)中的溫度和產(chǎn)卵數(shù)，i=1,2,3,4,5,6.(1)若用線性回歸模型擬合，求y關(guān)于x的回歸方程 (精確到0.1）；(2)若用非線性回歸模型擬合，求得y關(guān)于x回歸方程為 且相關(guān)指數(shù)R2＝0.9522． ①試與(1)中的線性回歸模型相比較，用R2說(shuō)明哪種模型的擬合效果更好 ?②用擬合效果好的模型預(yù)測(cè)溫度為35℃時(shí)該種藥用昆蟲(chóng)的產(chǎn)卵數(shù).(結(jié)果取整數(shù)).
新人教版高中英語(yǔ)選修2Unit 3 Food and Culture-Discovering useful structures教學(xué)設(shè)計(jì)
The newspaper reported more than 100 people had been killed in the thunderstorm.報(bào)紙報(bào)道說(shuō)有一百多人在暴風(fēng)雨中喪生。(2)before、when、by the time、until、after、once等引導(dǎo)的時(shí)間狀語(yǔ)從句的謂語(yǔ)是一般過(guò)去時(shí)，以及by、before后面接過(guò)去的時(shí)間時(shí)，主句動(dòng)作發(fā)生在從句的動(dòng)作或過(guò)去的時(shí)間之前且表示被動(dòng)時(shí)，要用過(guò)去完成時(shí)的被動(dòng)語(yǔ)態(tài)。By the time my brother was 10, he had been sent to Italy.我弟弟10歲前就已經(jīng)被送到意大利了。Tons of rice had been produced by the end of last month. 到上月底已生產(chǎn)了好幾噸大米。(3) It was the first/second/last ... time that ...句中that引導(dǎo)的定語(yǔ)從句中，主語(yǔ)與謂語(yǔ)構(gòu)成被動(dòng)關(guān)系時(shí)，要用過(guò)去完成時(shí)的被動(dòng)語(yǔ)態(tài)。It was the first time that I had seen the night fact to face in one and a half years. 這是我一年半以來(lái)第一次親眼目睹夜晚的景色。(4)在虛擬語(yǔ)氣中，條件句表示與過(guò)去事實(shí)相反，且主語(yǔ)與謂語(yǔ)構(gòu)成被動(dòng)關(guān)系時(shí)，要用過(guò)去完成時(shí)的被動(dòng)語(yǔ)態(tài)。If I had been instructed by him earlier, I would have finished the task.如果我早一點(diǎn)得到他的指示，我早就完成這項(xiàng)任務(wù)了。If I had hurried, I wouldn't have missed the train.如果我快點(diǎn)的話，我就不會(huì)誤了火車(chē)。If you had been at the party, you would have met him. 如果你去了晚會(huì)，你就會(huì)見(jiàn)到他的。
新人教版高中英語(yǔ)選修2Unit 3 Food and Culture-Reading and thinking教學(xué)設(shè)計(jì)
The discourse explores the link between food and culture from a foreign’s perspective and it records some authentic Chinese food and illustrates the cultural meaning, gerography features and historic tradition that the food reflects. It is aimed to lead students to understand and think about the connection between food and culture. While teaching, the teacher should instruct students to find out the writing order and the writer’s experieces and feelings towards Chinese food and culture.1.Guide the students to read the text, sort out the information and dig out the topic.2.Understand the cultural connotation, regional characteristics and historical tradition of Chinese cuisine3.Understand and explore the relationship between food and people's personality4.Guide the students to use the cohesive words in the text5.Lead students to accurately grasp the real meaning of the information and improve the overall understanding ability by understanding the implied meaning behind the text.1. Enable the Ss to understand the structure and the writing style of the passage well.2. Lead the Ss to understand and think further about the connection between food and geography and local character traits.Step1: Prediction before reading. Before you read, look at the title, and the picture. What do you think this article is about?keys:It is about various culture and cuisine about a place or some countries.
人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量的均值教學(xué)設(shè)計(jì)
對(duì)于離散型隨機(jī)變量，可以由它的概率分布列確定與該隨機(jī)變量相關(guān)事件的概率。但在實(shí)際問(wèn)題中，有時(shí)我們更感興趣的是隨機(jī)變量的某些數(shù)字特征。例如，要了解某班同學(xué)在一次數(shù)學(xué)測(cè)驗(yàn)中的總體水平，很重要的是看平均分；要了解某班同學(xué)數(shù)學(xué)成績(jī)是否“兩極分化”則需要考察這個(gè)班數(shù)學(xué)成績(jī)的方差。我們還常常希望直接通過(guò)數(shù)字來(lái)反映隨機(jī)變量的某個(gè)方面的特征，最常用的有期望與方差.二、 探究新知探究1.甲乙兩名射箭運(yùn)動(dòng)員射中目標(biāo)靶的環(huán)數(shù)的分布列如下表所示：如何比較他們射箭水平的高低呢？環(huán)數(shù)X 7 8 9 10甲射中的概率 0.1 0.2 0.3 0.4乙射中的概率 0.15 0.25 0.4 0.2類(lèi)似兩組數(shù)據(jù)的比較,首先比較擊中的平均環(huán)數(shù),如果平均環(huán)數(shù)相等，再看穩(wěn)定性.假設(shè)甲射箭n次，射中7環(huán)、8環(huán)、9環(huán)和10環(huán)的頻率分別為：甲n次射箭射中的平均環(huán)數(shù)當(dāng)n足夠大時(shí)，頻率穩(wěn)定于概率，所以x穩(wěn)定于7×0.1+8×0.2+9×0.3+10×0.4=9.即甲射中平均環(huán)數(shù)的穩(wěn)定值(理論平均值)為9,這個(gè)平均值的大小可以反映甲運(yùn)動(dòng)員的射箭水平.同理，乙射中環(huán)數(shù)的平均值為7×0.15+8×0.25+9×0.4+10×0.2=8.65.
人教版高中數(shù)學(xué)選修3分類(lèi)變量與列聯(lián)表教學(xué)設(shè)計(jì)
一、 問(wèn)題導(dǎo)學(xué)前面兩節(jié)所討論的變量,如人的身高、樹(shù)的胸徑、樹(shù)的高度、短跑100m世界紀(jì)錄和創(chuàng)紀(jì)錄的時(shí)間等,都是數(shù)值變量,數(shù)值變量的取值為實(shí)數(shù).其大小和運(yùn)算都有實(shí)際含義.在現(xiàn)實(shí)生活中,人們經(jīng)常需要回答一定范圍內(nèi)的兩種現(xiàn)象或性質(zhì)之間是否存在關(guān)聯(lián)性或相互影響的問(wèn)題.例如,就讀不同學(xué)校是否對(duì)學(xué)生的成績(jī)有影響,不同班級(jí)學(xué)生用于體育鍛煉的時(shí)間是否有差別,吸煙是否會(huì)增加患肺癌的風(fēng)險(xiǎn),等等,本節(jié)將要學(xué)習(xí)的獨(dú)立性檢驗(yàn)方法為我們提供了解決這類(lèi)問(wèn)題的方案。在討論上述問(wèn)題時(shí),為了表述方便,我們經(jīng)常會(huì)使用一種特殊的隨機(jī)變量,以區(qū)別不同的現(xiàn)象或性質(zhì),這類(lèi)隨機(jī)變量稱(chēng)為分類(lèi)變量.分類(lèi)變量的取值可以用實(shí)數(shù)表示,例如,學(xué)生所在的班級(jí)可以用1,2,3等表示,男性、女性可以用1,0表示,等等.在很多時(shí)候,這些數(shù)值只作為編號(hào)使用,并沒(méi)有通常的大小和運(yùn)算意義,本節(jié)我們主要討論取值于{0,1}的分類(lèi)變量的關(guān)聯(lián)性問(wèn)題.
