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新人教版高中英語必修1Welcome Unit-Reading for Writing教案
教學目標知識目標：讓學生更好理解如何恰當地寫一個人的信息介紹，并能讓學生熟練地使用一些寫作技能。能力目標：培養(yǎng)學生的寫作能力和團隊協(xié)作能力。情感目標：提升學生對寫作的興趣。教學重難點 教學重點：如何能讓學生更好地理解個人信息介紹。教學難點：如何能讓學生通過適當地使用一些寫作技能來寫一篇較好的個人信息介紹。教學準備 多媒體、黑板、粉筆一、Pre-class1. Greetings2. Leading-inAsk students how to write a profile. What kinds of aspects should be included? The teacher asks students to discuss the topic with each other and put forward to much more ideas about the answer.二、While-class1. The teacher lets students to read the student profiles on Page 8 silently and then asks students to discuss the questions below.1. What is Ann like? How do you know?2. What are Thando’s hobbies?3. Where does Thando come from?4. What is Thando’s dream?5. What does “You will never see me without a book or a pen” mean?
新人教版高中英語必修2Unit 1 Cultural Heritage-Discovering Useful Structure教案二
This theme of the part is “ Describe people or things in greater detail”. Students have learned the grammar(restrictive relative clauses) in Book 1, and further review and consolidate its structure “prep+relative pronouns(which/whom)” and the relative adverbs(when, where and why), besides students should understand its form, meaning and functions. In this section, students should be able to express the grammar correctly in daily communication and in the writing. 1. Review the basic usages of relative pronouns and adverbs of attributive clauses . 2. Learn to use some special cases about restrictive relative clauses.3. Learn to write sentences with restrictive relative clauses flexibly according to the context.1. Review the basic usages of relative pronouns and adverbs of attributive clauses .2. Learn to use some special cases about restrictive relative clauses.3. Learn tow rite sentences with restrictive relative clauses flexibly according to the context.Step 1. Observe the following sentences, and mark the relative pronouns and the adverbs. 1. After listening to the scientists who had studied the problems, and citizens who lived near the dam, the government turned to the United Nations for help.2. Temples and other cultural sites were taken down piece by piece, and then moved and put back together again in a place where they were safe from the water.Step 2 PracticePlease complete these sentences with relative pronouns and relative adverbs and answer the following questions.Questions: 1. What is the head noun ?2. What relative words should be used ?3. What elements do they act in these sentences ?
新人教版高中英語必修2Unit 1 Cultural Heritage-Discovering Useful Structure教案一
This teaching period mainly deals with grammar “restrictive relative clauses.” To begin with, teachers should lead students to revise what they have learned about the relative pronouns and relative adverbs. And then, teachers move on to stress more special cases concerning this grammar, such as the “preposition+ relative pronouns which and whom” and cases where we can omit the relative pronouns. This period carries considerable significance to the cultivation of students’ writing competence and lays a solid foundation for the basic appreciation of language beauty. The teacher is expected to enable students to master this period thoroughly and consolidate the knowledge by doing some exercises. 1. Guide students to review the basic usages of relative pronouns and adverbs of attributive clauses.2. Lead students to learn to use some special cases concerning restrictive relative clauses flexibly.2. Enable students to use the basic phrases structures flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of relative pronouns and adverbs of attributive clauses in a sentence2. Instruct students to write essays using the proper relative pronouns and adverbs of attributive clauses.本節(jié)語法思考：定語從句在復合句中的作用是什么？ 關系詞有哪些？定語從句在復合句中的作用相當于形容詞，它在句中作定語修飾名詞或代詞。他們在先行詞和定語從句之間起到聯系作用，同時在意義上代表先行詞并在定語從句中擔任一個成分。被定語從句所修飾的詞稱先行詞，定語從句一般放在先行詞的后面。
新人教版高中英語必修2Unit 1 Cultural Heritage-Listening＆Speaking＆Talking教案
Listening and Speaking introduces the topic of “Take part in a youth project”. The listening text is an interview about an international youth cultural heritage protection project. More than 20 high school students from seven countries participated in the project. The reporter interviewed two participants Stephanie and Liu Bin. By listening to the text, students can understand the significance of cultural heritage protection, and teenagers can use their knowledge, combine their own interests and advantages, etc. to participate in the action of cultural heritage protection. Listening and Talking introduces the theme of "Talk about history and culture". The listening text is a dialogue between two tourists and tour guides when they visit the Kremlin, red square and surrounding buildings. The dialogue focuses on the functional items of "starting a conversation", which is used to politely and appropriately attract the attention of the others, so as to smoothly start a conversation or start a new topic. The purpose of this section is to guide students to understand the history and current situation of Chinese and foreign cultural heritage in their own tourism experiences or from other people's tourism experiences, explore the historical and cultural values, and be able to express accurately and appropriately in oral communication.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to participate in cultural heritage protection activities.3. Instruct students to use functional sentences of the dialogue such as “I beg your pardon, but…” “Forgive me for asking, but…" and so on to start the conversation more politely and appropriately.
新人教版高中英語必修2Unit 1 Cultural Heritage-Reading and Thinking教案二
1. This section focuses on "Understanding how a problem was solved”, which is aimed to guide students to analyze and discuss the challenges and problems faced by cultural heritage protection during the construction of Aswan Dam, as well as the solutions. On the basis of understanding, students should pay attention to the key role of international cooperation in solving problems, and attach importance to the balance and coordination between cultural heritage protection and social and economic development. Students are encouraged to face challenges actively, be good at cooperation, and make continuous efforts to find reasonable ways and means to solve problems.2. Enable students to understand the main information and text structure of the reading text;3. Motivate students to use the reading strategy "make a timeline" according to the appropriate text genre;4. Enable students to understand how a problem was solved;5. Enable students to understand the value of protecting cultural heritage by teamwork and global community;1. Guide students to pay attention to reading strategies, such as prediction, self-questioning and scanning.2. Help students sort out the topic language about protecting cultural relics and understand the narrative characteristics of "time-event" in illustrative style3. Lead students to understand the value of protecting cultural heritage by teamwork and global community;
新人教版高中英語必修2Unit 1 Cultural Heritage-Reading and Thinking教案一
The theme of the reading and thinking is about “Understanding how a problem was solved”.The Listening & Speaking & Talking is about international co-work to protect the Mount Tai, in which the students from seven countries came up with many solutions even create the Mount Tai App. This section aims at showing how to solve a difficult and even tough problem about protecting the cultural heritage by the international co-work. So in this section, cultivating students’ international awareness is very clear and important. Concretely, with the economic development, how to balance the protection of cultural relics and social development is a big challenge for human. In the 1950s, the Egyptian government wanted to build the Aswan Dam across the Nile to control floods, produce electricity and water farms. But the proposal led to protests because it would destroy a lot of cultural relics. The Egyptian had no choice but ask the UN for help. Therefore, a international cooperation about how to protect the cultural relics began, which involved the time length about 20 years and a large amount of fund. Then, the problems was solved. 1. Read quickly to get the main idea and the structure of the article; read careful to get detailed information.2. Learn to use the reading strategy---making a timeline3. Learn how to solve a tough problem by asking for help and cooperation4. Have the international awareness and understand the great strength of international cooperation.1. Read quickly to get the main idea and the structure of the article; read careful to get detailed information.2. Learn to use the reading strategy---making a timeline.3. Learn how to solve a tough problem by asking for help and cooperation.
新人教版高中英語必修2Unit 1 Cultural Heritage-Reading For Writing教案
This report is short, concise and has typical news content and language features. The title uses the verb phrases, embodying the characteristics of being concise and general. The introduction is the first two sentences in the first paragraph, describing the general situation of the cultural heritage protection project, including time, place, characters, events and other news elements, so that readers can see the main points of the news report at a glance. The main body is the second and third paragraphs, which report the important historical and cultural value of Mogao Grottoes and the production of Mogao Grottoes Material digital photos, which are of great significance to the inheritance of historical culture and the promotion of international cultural understanding, exchange and cooperation. Direct citation is used in the report, as well as background introduction and other news writing techniques.1. Get students to have a good understanding of some features about a news report by reading the text.2. Instruct students to write a summary about a news report properly using some newly acquired writing skills in this period.3. Develop students’ writing and cooperating abilities.4. Strengthen students’ great interest in writing discourses.1. Stimulate students to have a good understanding of how to a summary about a news report 2. Cultivate students to write a news report properly and concisely.Step 1: Lead in Do you think it is necessary for us to circulate our cultural heritage to the world? Why or why not?Do we need to learn more about other countries’ cultural heritage? Why or why not?Step 2: Read to discover details concerning the main body of the news report.
新人教版高中英語必修3Unit 1 Festivals and Celebrations教學設計二
1. Ss look at the picture and scan the passage to understand the main idea while teacher is giving the following questions to inspire Ss to think.*Where are those people?*What are they doing?*Why are they so excited?2. Ss complete the passage with the appropriate -ing form. Then discuss and check the answers with class.Answers: boring, interesting, taking, exciting, amazing3. The teacher raises questions for the students to discuss and encourages them to express their opinions.*Do you like La Tomatina? Why or why not?4. Each group representative reports the discussion result, the teacher gives feedback and the evaluation.Step 6 PracticeActivity 41. Ss complete the Ex 2 in Using structures.2. Check the answers after finishing the exercises.①The dragon boat races are the most exciting part of the Dragon Boat Festival.② The children were excited to go Easter egg hunting.③What an amazing performance! This is the best music festival I have ever been to.④We were amazed by her funny-looking hat.⑤His inspiring speech at the conference won the admiration/ favour of the audience.⑥This is a challenging game to test your memory and observation capabilities. 3. T asks Ss to finish Ex 3 and 4 in Using structures by themselves, then check the answers with class.Step 6 Homework1. Understand and master the functions and usage of the -ing form;2. Finish the other exercises in Using structures.1、通過本節(jié)內容學習，學生是否理解和掌握動詞-ing形式作定語和表語的功能和意義；2、通過本節(jié)內容學習，學生能否在理解文段內容的基礎上，根據上下文語境和表達邏輯，能正確運用動詞-ing形式描述節(jié)日慶典。3、通過本節(jié)內容學習，學生是否歸納和積累用于表達情緒的相關詞匯。
新人教版高中英語必修3Unit 1 Festivals and Celebrations教學設計一
本板塊的活動主題是“談論節(jié)日活動”（Talk about festival activities），主要是從貼近學生日常生活的角度來切入“節(jié)日”主題。學生會聽到發(fā)生在三個國家不同節(jié)日場景下的簡短對話，對話中的人們正在參與或將要親歷不同的慶?；顒?。隨著全球化的進程加速，國際交流日益頻繁，無論是國人走出國門還是外國友人訪問中國，都已成為司空見慣的事情。因此，該板塊所選取的三個典型節(jié)日場景都是屬于跨文化交際語境，不僅每組對話中的人物來自不同的文化背景，對話者的身份和關系也不盡相同。1. Master the new words related to holiday: the lantern, Carnival, costume, dress(sb)up, march, congratulation, congratulate, riddle, ceremony, samba, make - up, after all. 2. To understand the origin of major world festivals and the activities held to celebrate them and the significance of these activities;3. Improve listening comprehension and oral expression of the topic by listening and talking about traditional festivals around the world;4. Improve my understanding of the topic by watching pictures and videos about different traditional festivals around the world;5. Review the common assimilation phenomenon in English phonetics, can distinguish the assimilated phonemes in the natural language flow, and consciously use the assimilation skill in oral expression. Importance:1. Guide students to pay attention to the attitude of the speaker in the process of listening, and identify the relationship between the characters;2. Inspire students to use topic words to describe the festival activities based on their background knowledge. Difficulties:In the process of listening to the correct understanding of the speaker's attitude, accurately identify the relationship between the characters.
新人教版高中英語必修3Unit 1 Festivals and Celebrations教學設計三
*wide range of origins(= a great number of different origins, many kinds of origins)*It featured a parade and a great feast with music, dancing, and sports. (=A parade and a great feast with music, dancing, and sports were included as important parts of the Egyptian harvest festival.)*.. some traditions may fade away and others may be established.(= Some traditions may disappear gradually, while other new traditions may come into being.）Step 6 Practice(1) Listen and follow the tape.The teacher may remind the students to pay attention to the meaning and usage of the black words in the context, so as to prepare for the completion of the blanks in activity 5 and vocabulary exercises in the exercise book.(2) Students complete the text of activity 5 by themselves.The teacher needs to remind the students to fill in the blanks with the correct form of the vocabulary they have learned in the text.Students exchange their answers with their partners, and then teachers and students check their answers.(3)Finish the Ex in Activity 5 of students’ book.Step 7 Homework1. Read the text again, in-depth understanding of the text;2. Discuss the origin of festivals, the historical changes of related customs, the influence of commercial society on festivals and the connotation and essential meaning of festivals.3. Complete relevant exercises in the guide plan.1、通過本節(jié)內容學習，學生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過本節(jié)內容學習，學生能否結合文本特點快速而準確地找到主題句；3、通過本節(jié)內容學習，學生能否理清論說文的語篇結構和文本邏輯，了解節(jié)日風俗發(fā)展與變遷，感悟節(jié)日的內涵與意義。
新人教版高中英語選修1Unit 3 Fascinating Parks教案
2. Explore the significance of the establishment of Sarek National Park.Q1: Which event is the most important one in the park’s history?Ss: The establishment of Sarek national park in 1909 is the most important one.Q2: Is it worth making a place like Sarek a national park? Give your reasons.Ss: Yes. In this way, the place can be kept in its natural state and natural beauties and other rare and valuable resources can be preserved instead of being destroyed by endless exploitation driven by profits.Q3: How does the writer organize his introduction to the history of Sarek?Ss: The writer organizes his introduction in the sequence of time, using time indicators such as “used to”, “around 9,000 years ago”, “soon after”, “following the reindeer”, and “in 1909”.Q4: What is the feature of the language used to introduce the history of the park?Ss: The introduction to the park is to provide facts, using time indicators to organize the events. Sentences starts with “third person” and passive voice is used more often, feeling objective.【設計意圖】學生尋找和梳理公園歷史上的重要事件，體會人與自然的和諧關系，評鑒介紹性語言的特點?！竞诵乃仞B(yǎng)提升點】發(fā)展自主提取、梳理文本信息能力，訓練邏輯思維和高階思維。Activity 3: Highlighting the secret of the text
新人教版高中英語選修1Unit 2 Looking into the Future教案
【設計意圖】以“新科技是一把雙刃劍”為主題開展討論活動。這個話題比較大，所以給了一定的限制，首先需要以智能家居為例來闡述科技發(fā)展對未來生活產生的影響，然后列舉其優(yōu)點和缺點，最后就以上現象發(fā)表自己的觀點。這個活動是對整個文本的創(chuàng)意性總結與意義的升華，留給學生一定的想象空間，學生借此機會可以運用文本內容和語言表達自己對科技發(fā)展的看法和態(tài)度。Assignments:1. Finish Exercise 4 on Page 15 of the textbook.A smart home is one that integrated computers into the structure of the building itself. In this way, many of the things that we now do ourselves become automatic. For example, the smart home could control the air conditioning and lights so that you would no longer have to turn switches on and off, and so that your home would be more energy-efficient. The smart home could also monitor itself to make sure that everything is working as it should, and send you warnings if there is a problem. Such smart homes could even be programmed to detect your health problems, and then give you reasonable advice as to the food you should eat or if you should see a doctor. So, in a sense, smart homes will lead us to living smarter lives.2.Create a smart function for your home, and share your creation in the next period.
新人教版高中英語選修1Unit 4 Body Language教案
本閱讀材料的話題是交際中的肢體語言，作者從三個方面講述了肢體語言的特征與作用，通過主題句和舉例闡述的方式讓讀者了解不同文化中肢體語言的相同或者不同的意義，并從更抽象、概括的維度深入認識肢體語言的特點，理解肢體語言的作用。基于肢體語言的特點，作者提醒讀者在與人交流中，尤其是當文化背景有差異的時候，要使用得體的肢體語言，尊重、理解和包容不同的文化，進行有效、有素養(yǎng)的溝通。文本共由六個段落組成，篇章結構為“總—分”。第一段用簡練的語言引出了話題，并且從我們自身表達的需要和了解他人感受兩個角度講述了肢體語言的作用。第二段闡述了肢體語言的第一個重要特點——肢體語言在不同的文化中有不同的內涵——這也是文中寫作篇幅最大的一個要點，最為重要。通過講述肢體語言的這一特點，作者向讀者傳遞了要尊重不同的文化、要使用與所在文化相宜的肢體語言。
新人教版高中英語選修1Unit 5 Working the Land教案
1. 完成文本主要信息填空（斜體字部分設空）：As a witness to farmers’ poor harvests and even a severe shortage of food, Yuan Longping was determined to devote his life to tackling this crisis. After graduation, he realized that what farmers needed most was to boost yields in the fields. Yuan was convinced that the answer lay in the creation of hybrid rice, one characteristic of which is that it usually achieve higher output than conventional crops. However, it was no easy job. The first difficulty he needed to overcome was scientists’ general assumption that this could not be done. Through trial and error, Yuan managed to generate this incredible crop. It is estimated that about 60 percent of domestic rice consumption in China was comprised of crops generated from Yuan’s hybrid strains. His innovation has enabled Chinese farmers to considerably expand their output and helped feed the world. Unwilling to retire early to a life of leisure and unconcerned about celebrity or fortune, Yuan continues to turn one vision after another into realities.2. 模仿寫作：Do some research via the Internet and introduce another agricultural scientist, Chen Risheng（陳日勝）, using the structure, expressions and writing techniques you have learnt from the text “A Pioneer for All People”.【設計意圖】任務1是對文本內容和詞匯學習成效的檢測。任務2借助文本中學到的詞匯和寫作手法仿寫另一位科學家，提升學生遷移運用詞匯、文體結構和寫作方法的能力。
新人教版高中英語選修4Unit 1 Science Fiction教案
本活動旨在落實課時教學目標2。 1.Think, discuss and share. Students form groups of 4, discuss about the given ending make comments. Q1: Do you like the ending? Q2: Was it a logical ending? Why so or why not? [設計意圖]通過引導學生思考、討論、評價，比較個人、同伴所預測的結局和聽力文本所給定的結局的異同點，深化對文本的認知，發(fā)展學生的評判性思維能力。 Activity 4: Exploring Asimov’s three laws of robotics and the purpose of the writing 本活動旨在落實課時教學目標3。 1. Get to know Isaac Asimov’s three laws of robotics. The teacher shares Isaac Asimov’s three laws of robotics. The three laws state that: ①A robot may not injure a human being or, through inaction, allow a human being to come to harm. ②A robot must obey any orders given to it by human beings, except where such orders would conflict with the First Law. ③A robot must protect its own existence as long as such protection does not conflict with the First or Second Law. Q: How does Tony’s story relate to the laws? 2. Figure out Isaac Asimov’s purpose of writing Satisfaction Guaranteed. The students express their opinions about the author’s writing purpose. Q: Why did Isaac Asimov write such a story? S: To explore the relationship between robots and humans. [設計意圖]通過了解艾薩克·阿西莫夫所制定的機器人三大定律，加深學生對文本的理解，深入探究文本的主題意義。推理作者的寫作目的，聯系生活實際，思考人類與機器人的關系。
新人教版高中英語選修3Unit 1 Art教案
[2] An important breakthrough…was… [3] Another innovation was … [4] the emphasis increasingly shifted from…to… [5] New ideas and values gradually replaced… [6] While his paintings still had religious themes… … T: All these expressions serve to show how Western painting has developed. Some of them share similar structure but with varied use of words, which makes the text vivid and more readable. 【設計意圖】主題類語言整理有助于學生類化語言應用，提高語言輸出的豐富性。處理完文本內容信息后，進入語篇信息處理，進行主題相關的詞塊歸類。引導學生快速閱讀，尋找表達相同主題(發(fā)展或者藝術)的詞和短語，再根據詞性、用法和結構進行歸類，儲備主題相關詞匯，豐富語言儲備，提升語言素養(yǎng)。 Assignment: Go online to gather more information about Chinese painting and write a short history of it. 【設計意圖】結合所學，遷移運用，根據實際語境，進行模仿性運用。在此過程中，學生嘗試借鑒已學的語言、內容、語篇結構和寫作手法來建構新文本，實現語篇輸出，同時關注中西藝術文化的差別，加深對優(yōu)秀文化的認同，培養(yǎng)文化意識。
人教版高中地理必修1河流地貌的發(fā)育教案
【引入新課】同學們在河邊玩耍的時候不知注意到如圖中所展示的場面沒有？（注意到了）那么同學們知道圖中A、B、C它們的名稱分別是什么嗎？（不知道）它們的名稱簡單的講可以統(tǒng)稱為河流地貌。至于它們的具體名稱和形成原理就是我們今天要討論的問題。一、河流地貌【介紹】河流地貌是自然界中最常見的地貌之一。按照成因，可以將河流地貌分為侵蝕地貌和堆積地貌，它們的形成和發(fā)展主要與外力作用有關?！景鍟?、分類： 侵蝕地貌和堆積地貌【過渡】我們首先來看一下河流侵蝕地貌【板書】2、河流侵蝕地貌【介紹】河流在流動過程 中，會破壞并掀起地表的物質，形成侵 蝕地貌。河流侵蝕地貌是由溯源侵蝕、下蝕和側蝕共同作用形成的?！疽龑ёx書】請同學們快速閱讀教材P83倒數 第二段，添出以下表格。
人教版高中地理必修1大規(guī)模的海水運動教案
4．海洋污染（1）閱讀書本P64，由學生歸納：（2）展示圖片資料：“威望號油輪泄漏事故”【討論】石油污染將對該海區(qū)的生態(tài)環(huán)境造成怎樣的影響？【小結】本節(jié)課我們從四個方面了解了洋流對地 理環(huán)境和人類活動的影響，重點學習洋流對氣候和對漁場形成的影響。同學們聽說過“厄爾尼諾”現象嗎？“厄爾尼諾”現象會影 響秘魯漁場的漁獲量；也會對氣候產生影響，導致全球氣候異常?！禾骄俊吧衿娴亩驙柲嶂Z”現象』學習小組交流【小結】“厄爾尼諾”現象還有許多不解之謎，其中之一是形成原因，尚未能解釋清楚。有人認為是南半球東南信風減弱造成的，也有人認為是大氣環(huán)流減弱造成的結果；且“厄爾 尼諾”現象發(fā)生有沒有自身的規(guī)律？發(fā)生周期長短受什么制約？等等，這些謎團等待我們去一一解開。
人教版高中地理必修1常見天氣系統(tǒng)教案
知識和技能 ⑴從圖片和簡易圖中，了解氣團（冷氣團、暖氣團）的概念；鋒的概念與分類；低壓（氣旋）、高壓（反氣旋）、高壓脊、低壓槽的概念。⑵從氣溫、氣壓、濕度、降水、風等幾方面分析各種天氣系統(tǒng)的形成及其氣流特點，并綜合出各種天氣系統(tǒng)控制下的天氣狀況過程與方法 ⑴讓學生能閱讀和簡單分析天氣圖，解釋天氣變化現象；⑵用案例說明氣象災害發(fā)生的原因和危害；⑶結合我國常見的天氣系統(tǒng)說明其對人們生產和生活的影響情感、態(tài)度與價值觀激發(fā)學生探究天氣的形成和變化的興趣和動機，培養(yǎng)學生求真、求實的科學態(tài)度，提高地理審美情趣教學重點1.鋒面系統(tǒng)。(鋒面系統(tǒng):一是要區(qū)別冷暖鋒的成因，二是要掌握鋒面兩側的氣壓、溫度、濕度、風和天氣差異)2.低壓、高壓系統(tǒng)。（要掌握其成因、氣壓特征、氣流特征及其天氣特點四個方面。）
人教版高中地理必修1地球的運動教案
三維目標：知識和技能 1、了解地球自轉和公轉的方向及一些基本數據：周期、速度、公轉軌道、黃赤交角。2、理解由于地球自轉運動造成的晝夜交替、地方時差，掌握時間的有關換算，能正確判斷晨昏線。3、理解地球自轉和公轉的關系，理解太陽直射點的南北移動的過程及其原因，并能演示其運動規(guī)律。4、理 解晝夜長短和正午太陽高度的季節(jié)變壞緯度變化 。過程與方法 1、通過運用地球儀演示地球的自傳和公轉現象，學生能夠準確的畫出夏至日到冬至日太陽照射地球的示意圖2、能根據“二分二至日太陽照射地球示意圖”分析全球各 地的晝夜長短和正午太陽高度的變化，分析同緯度地區(qū)不同季節(jié)和不同緯度地區(qū)相同季節(jié)的晝夜長短和正午太陽高度的變化。
