教學(xué)目標:1、知識與能力:①了解荊軻刺秦王的歷史背景和過程,整體感知課文。②掌握文言文中重要的字、詞、句解釋,提高翻譯能力。③學(xué)會從人物的對話、動作、神態(tài)描寫入手,分析主要人物形象。2、情感與態(tài)度:正確看待荊軻刺秦王這一事件,學(xué)會歷史而辯證地評價人物。重點難點:評價歷史事件,分析人物形象。教學(xué)方法:朗讀法、提問法、討論法課時安排:三課時教學(xué)過程:第一課時一、導(dǎo)入:(課前展示雕塑照片)來到正定講課,我感到非常高興,一進縣城,就被這里濃郁的歷史文化氣息所感染。我們住在華陽假日酒店,外面正在興建文化廣場,剛才的照片就是在那里拍攝的。在此,我進一步了解到正定這座文化古城悠久的歷史淵源,這里有南越王趙佗,常勝將軍趙云,一代名家顏真卿等等,可謂物華天寶、人杰地靈。因此我相信我們正定中學(xué)的同學(xué)們一定都非常優(yōu)秀。這也讓我更深刻地體會到一個道理:語文的外延就是生活的外延。
3、介紹對聯(lián)的歷史引出本課的重點。人類歷史上的第一副對聯(lián)是“新年納余慶,嘉節(jié)號長春”。出現(xiàn)在五代十國時期(公元964年),距離現(xiàn)在已經(jīng)有1044年了。有著一千多年歷史的對聯(lián)有什么基本的特點呢?這是我們這節(jié)課學(xué)習(xí)的重點。請在座的各位當(dāng)回醫(yī)生,給下面這幅對聯(lián)號號脈,看它對仗是否工整?上聯(lián):冬去春來千條楊柳迎風(fēng)綠下聯(lián):冰消雪化梅花萬朵撲鼻有什么問題,怎么改?剛才這幾位同學(xué)指出了這幅對聯(lián)的兩個問題,也提出了兩條修改意見。第一是下聯(lián)少了一個字,最好是添加一個“香”字;第二是下聯(lián)的“梅花萬朵”與上聯(lián)的“千條楊柳”是數(shù)量詞對名詞,名詞對數(shù)量詞,對仗不工整,要調(diào)整為“萬朵梅花”。這樣,數(shù)量詞“萬朵”對“千條”,名詞“梅花”對“楊柳”。大家還有沒有不同的看法。這樣我們就可以得出對聯(lián)的兩個特點特點:第一個特點是上下聯(lián)字數(shù)要相等(板書)。就是上聯(lián)有幾個字,下聯(lián)也要有幾個字。大家記下來,對聯(lián)基本要求一,“上下聯(lián)字數(shù)相等”。這個要求是很嚴格的,一般來說,違反這個規(guī)則就不成對聯(lián)了。
書法藝術(shù)的繁榮期,是從東漢開始的東漢時期出現(xiàn)了專門的書法理論著作,最早的書法理論提出者是東西漢之交的揚雄第一部書法理論專著是東漢時期崔瑗的《草書勢》漢代書法家可分為兩類:一類是漢隸書家,以蔡邕為代表一類是草書家,以杜度、崔瑗、張芝為代表,張芝被后人稱之為“草圣”最能代表漢代書法特色的,莫過於是碑刻和簡牘上的書法東漢碑刻林立,這一時期的碑刻,以漢隸刻之,字型方正,法度謹嚴、波磔分明此時隸書已登峰造極漢代創(chuàng)興草書,草書的誕生,在書法藝術(shù)的發(fā)展史上有著重大意義它標志著書法開始成為一種能夠高度自由的抒發(fā)情感,表現(xiàn)書法家個性的藝術(shù)草書的最初階段是草隸,到了東漢時期,草隸進一步發(fā)展,形成了章草,后由張芝創(chuàng)立了今草,即草書
【備課資料】百團大戰(zhàn)八路軍從8月20日起,在華北敵后出動105個團,約40萬兵力,在2500公里長的戰(zhàn)線上,發(fā)動了規(guī)模最大的“以徹底破壞正太路若干要隘,消滅部分敵人截斷該線交通”為目的的舉世聞名的“百團大戰(zhàn)”。八路軍提出“不留一根鐵軌、不留一根枕木、不留一個車站、不留一個碉堡、不留一座橋梁”的口號,“讓敵人用腳同我們賽跑”,“讓敵人用牛驢搬炮彈、飛機大炮”。八路軍展開攻堅戰(zhàn),端掉敵一系列據(jù)點。據(jù)有關(guān)資料記載,從8月20日到12月5日,在歷時三個半月的“百四大戰(zhàn)”中,我軍共進行大小戰(zhàn)斗1824次,斃傷日偽軍25800余人,俘日偽軍18600余人,繳獲了大批武器、彈藥和軍用食品等;破壞鐵路470多公里,公路1500多公里,橋梁、車站、隧道等260余處,使正太鐵路停運月余;攻克日偽據(jù)點2993個,鞏固和擴大了抗日軍民占領(lǐng)區(qū)。
1.知識與能力:(1)通過引導(dǎo)學(xué)生分析鑒賞19世紀以來有代表性的音樂與美術(shù)作品,了解這些作品產(chǎn)生的時代背景及其藝術(shù)價值。(2)通過分析世界藝術(shù)產(chǎn)生的歷史背景,可以幫助學(xué)生正確認識人類文化的多樣性、時代性和民族性,培養(yǎng)學(xué)生結(jié)合歷史背景分析歷史問題的能力。(3)通過對19世紀以來的音樂與美術(shù)史實的分析、綜合、比較、歸納、概括等認知活動,培養(yǎng)歷史思維和解決問題的能力。2.過程與方法:(1)讓學(xué)生在搜集資料、自主探究、合作交流過程中,發(fā)展學(xué)生在社會中學(xué)習(xí)、網(wǎng)絡(luò)學(xué)習(xí)、終身學(xué)習(xí)的能力。(2)通過上網(wǎng)了解藝術(shù)大師及分析鑒賞其各類美術(shù)、音樂作品,感受其藝術(shù)價值。 (3)思維方法:學(xué)會知識遷移,在從感知歷史到不斷積累歷史知識,進而不斷加深對歷史和現(xiàn)實的理解過程中,提高分析理解問題能力。學(xué)會善于從不同的角度發(fā)現(xiàn)問題,積極探索解決問題的方法,從而做到論從史出、史論結(jié)合。
(三)課堂總結(jié)、點評 本節(jié)內(nèi)容講述了價格變動對人們生活、生產(chǎn)的影響作用,主要知識框架如下:(1)、價格變動會影響人們的消費需求,商品價格上漲,人需求就減少,反之,則增大。價格變動對不同商品需求影響程度是不一樣的,對生活必需品的需求量影響較小,對高檔耐用品的需求量影響較大。相關(guān)商品價格變動對消費需求的影響不同,某種商品價格上漲,就會減少需求量,其替代品需求量增加,其互補品需求量則減少。(2)、價格變化也會影響生產(chǎn)經(jīng)營,價格變動會調(diào)節(jié)生產(chǎn),刺激生產(chǎn)者改進技術(shù),提高勞動生產(chǎn)率,促使生產(chǎn)者生產(chǎn)適銷對路的高質(zhì)量產(chǎn)品。★課余作業(yè) 運用所學(xué)知識說明,價格變動為什么會促使生產(chǎn)者提高勞動生產(chǎn)率?★教學(xué)體會 本節(jié)學(xué)習(xí)內(nèi)容,教學(xué)中注意多引用生活、市場中的實際例子,讓學(xué)生在具體、感性材料中,感悟其中包含的經(jīng)濟學(xué)道理,學(xué)會獨立分析,切忌機械記憶。
(2)、價值規(guī)律 教師總結(jié):通過這一節(jié)的學(xué)習(xí)我們明白了一個道理:商品的價值量由生產(chǎn)商品的社會必要勞動時間決定,商品交換以價值量為基礎(chǔ)實行等價交換。這一經(jīng)濟原則就叫做價值規(guī)律。受供求關(guān)系影響,商品價格圍繞價值上下波動,是價值規(guī)律要求發(fā)生作用的具體表現(xiàn)。(3)、價格圍繞價值上下波動是價值規(guī)律的表現(xiàn)形式(三)課堂總結(jié)、點評 本節(jié)內(nèi)容講述的主要知識如下:1、氣候、時間、地域、生產(chǎn)、習(xí)俗等因素會改變供求關(guān)系狀況,供求關(guān)系變化影響價格變動,形成賣方市場和買方市場。2、商品價格由價值決定,價值量與社會必要勞動時間成正比,與勞動生產(chǎn)率成反比。3、商品價格由價值決定,并受供求關(guān)系影響,在二者共同作用下形成市場價格。4、社會必要勞動時間決定商品價值量,商品交換以價值量為基礎(chǔ)實行等價交換,是價值規(guī)律的基本內(nèi)容,價格圍繞價值上下波動是價值規(guī)律的表現(xiàn)形式。
教師點撥:這則材料說明,市場調(diào)節(jié)有其局限性,單純的市場調(diào)節(jié)具有自發(fā)性、盲目性、滯后性等缺點。市場調(diào)節(jié)不是萬能的。社會生活中有很多領(lǐng)域和產(chǎn)品不能用市場來調(diào)節(jié),如國防、治安、消防等產(chǎn)品的供給問題,槍支彈藥、麻醉品等都不能讓市場來調(diào)節(jié)。市場調(diào)節(jié)具有自發(fā)性、盲目性、滯后性。自發(fā)性:由于市場調(diào)節(jié)是在價值規(guī)律自發(fā)作用下進行的,在利益驅(qū)動下會產(chǎn)生一些違反市場原則的行為,如制造、銷售假冒偽劣商品,大量排放廢水、廢氣破壞環(huán)境,竊取他人智力成果等等。盲目性:由于人們不可能完全掌握生產(chǎn)各方面信息及其變化趨勢,致使決策帶有一定的盲目性。如某種商品有利可圖則一哄而上,反之則一哄而退,從而造成資源浪費和消費得不到充分滿足。滯后性:由于市場價格的形成和傳遞有一個過程,一旦傳遞到生產(chǎn)經(jīng)營者手中進行生產(chǎn)調(diào)整,就有一個時間差,致使市場調(diào)節(jié)帶有滯后性,成為一種事后調(diào)節(jié)。
(3)騙稅 騙稅是指納稅人用欺騙手段獲得國家稅收優(yōu)惠的行為。教師活動:請同學(xué)們看教材87頁“相關(guān)鏈接”,了解騙稅行為的特點和法律處罰規(guī)定。學(xué)生活動:認真閱讀,積極思考。(4)抗稅 抗稅是指納稅人以暴力、威脅等手段,拒不繳納稅款的行為。教師活動:請同學(xué)們看教材87頁“相關(guān)鏈接”,了解騙稅行為的特點和法律處罰規(guī)定。學(xué)生活動:認真閱讀,積極思考。3、公民要增強稅收監(jiān)督意識教師活動:請同學(xué)們看教材88頁“相關(guān)鏈接”,思考公民如何維護國家稅收工作?學(xué)生活動:認真閱讀,積極思考。教師總結(jié):公民是國家稅收的最終負稅人,應(yīng)自覺增強稅收監(jiān)督意識,以主人翁的態(tài)度積極監(jiān)督國家公職人員及公共權(quán)力的行為,關(guān)注稅收的征收和使用情況,對他們的違法行為進行批評、檢舉,維護國家利益和自身利益。
(5)be to do (可以和具體的時間狀語連用)①表示按計劃、安排即將發(fā)生的動作。②用于時間、條件狀語從句中,表示“如果要……,想要……”。The students are to meet at the school gate tomorrow. 明天學(xué)生們將在學(xué)校大門口集會。 If you are to succeed, you must work as hard as possible. 如果你想要成功,比必須努力工作。(6)be about to do (不與具體的時間狀語連用) 表示即將要發(fā)生的動作。We are about to start. 我們就要出發(fā)了。The new school year is about to begin. 新學(xué)年開學(xué)在即。(7)一般現(xiàn)在時表將來①表示按時間表規(guī)定將要發(fā)生的動作。常限于表示位置移動的短暫性動詞。②在時間、條件或讓步狀語從句中,用一般現(xiàn)在時表將來。Look at the timetable. Hurry up! Flight 4026 takes off at 18:20. 你看看時刻表,快點!4026次航班的起飛時間是下午6點20分。Jane is in a hurry because the train to the airport leaves in half an hour. 簡很匆忙,因為去機場的火車半小時后出發(fā)。
①標題——標題應(yīng)當(dāng)簡潔明了。②導(dǎo)語——導(dǎo)語是消息開頭的第一段或第一句話,簡明扼要地揭示出消息的核心內(nèi)容。③主體——主體是消息的主要部分,要用充足的事實表現(xiàn)主題,對導(dǎo)語的內(nèi)容作進一步的展開和闡述。④結(jié)束語——通常是對全文內(nèi)容進行概括性的總結(jié)。3. 新聞報道增分句子(1)陳述事實常用的句型:①A terrible storm hit/struck ... , killing ..②It was a cool autumn night when the earthquake happened. A large number of buildings fell down and roads were destroyed, leaving a great many people homeless.地震發(fā)生在一個涼爽的秋夜。大量的建筑物倒塌,道路被毀,許多人無家可歸。③With the help of the rescue team, people who were the trapped in the flood were saved.在救援隊的幫助下,困在洪水中的人們得救了。(2)陳述觀點常用的句型:①Clearly/Obviously/In my opinion/It seemed that people were shocked.顯然/在我看來/似乎人們震驚了。②The whole city was in ruins after the earthquake.地震后整個城市成了一片廢墟。(3)揭示原因常用的句型:Because of/As a result of/Thanks to the help of the army, people who got injured were sent to the hospital immediately.
II Learn the technical terms-2.1. What can be used as “Subject, Object, Predicative, Direct Object, Indirect Object and objective complement” in a sentence?2. What can be used as “adverbial” in a sentence?3. What can be used as “verb” in a sentence?Answers to questions 1-3:1. Nouns, pronouns and appellations can be used as “Subject, Object, Predicative, Direct Object, Indirect Object and Objective Complement”. Besides, adjectives can be used as “Predicative and Objective Complement” in a sentence.2. Adverbs and prepositional phrases can be used as “Adverbial”.3. Verbs with actual meaning can be used as “Verb” in a sentence. Auxiliary verbs alone cannot be used as “Verb” in a sentence.III Learn to recognize the sentence structures.1. SV structure. For Example:(1) A bird flies.S V(2) A monkey jumps.S V(3) A fish swims.S V√ In SV structures, verbs are “intransitive verbs”.2. SVO structure. For Example:(1) A sheep eats grass.S V O(2) They like bananas.S V O(3) He wants candy.S V O√ In SVO structures, verbs are “transitive verbs”.3. SP structure. For Example:(1) This is great.S P (2) He looks well.S P (3) She became a teacher.S P √ In SP structures, Predicatives are formed by “l(fā)ink verbs” and “adjectives or nouns”.√ link verbs: be, become, grow, look, feel, taste, etc.4. SV IO DO structure. For Example:(1) He asked me a question.S V IO DO(2) Danny wrote me a letter.S V IO DO(3) Billy brought Sam a kite.S V IO DO√ In SV IO DO structures, the verbs are transitive and are followed by two objectives – pronouns or nouns as Indirect Objective, and nouns as Direct Objectives.
【教材分析】本節(jié)課是高中英語第一冊的最后一個單元的閱讀和思考部分,文章難度明顯增加,體現(xiàn)在以下幾個方面:文章題材是說明文,比較難理解;話題生疏,涉及到歷史等知識;生詞量增大,而且在語境中理解詞匯的要求提高。面對這些,教師的難度和高度也要有所提升,通過探討說明順序,了解背景知識等幫助他們找到說明文閱讀的方法?!窘虒W(xué)目標與核心素養(yǎng)】1. 文化意識目標新課程中指出,文化意識是對中外文化的理解和對優(yōu)秀文化的認同。文化意識的的培養(yǎng)有助于學(xué)生增加國家認同和家國情懷,成為有文明素養(yǎng)和社會責(zé)任感的人。我們這個單元很好體現(xiàn)了這一點,通過了解漢字書寫的體系和發(fā)展,學(xué)生可以有一種文化自豪感,同時也能夠幫助學(xué)生深入挖掘這篇文章,從而想到更多和中國文化相關(guān)的方面。2. 學(xué)習(xí)能力目標
教學(xué)目標知識目標:讓學(xué)生更好理解如何恰當(dāng)?shù)貙懸粋€人的信息介紹,并能讓學(xué)生熟練地使用一些寫作技能。能力目標:培養(yǎng)學(xué)生的寫作能力和團隊協(xié)作能力。情感目標:提升學(xué)生對寫作的興趣。教學(xué)重難點 教學(xué)重點:如何能讓學(xué)生更好地理解個人信息介紹。教學(xué)難點:如何能讓學(xué)生通過適當(dāng)?shù)厥褂靡恍懽骷寄軄韺懸黄^好的個人信息介紹。教學(xué)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?
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.
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.
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(shè)計意圖】學(xué)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(guān)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(xùn)練邏輯思維和高階思維。Activity 3: Highlighting the secret of the text
1. 完成文本主要信息填空(斜體字部分設(shè)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(shè)計意圖】任務(wù)1是對文本內(nèi)容和詞匯學(xué)習(xí)成效的檢測。任務(wù)2借助文本中學(xué)到的詞匯和寫作手法仿寫另一位科學(xué)家,提升學(xué)生遷移運用詞匯、文體結(jié)構(gòu)和寫作方法的能力。
本活動旨在落實課時教學(xué)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(shè)計意圖]通過引導(dǎo)學(xué)生思考、討論、評價,比較個人、同伴所預(yù)測的結(jié)局和聽力文本所給定的結(jié)局的異同點,深化對文本的認知,發(fā)展學(xué)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(xué)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(shè)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(xué)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(lián)系生活實際,思考人類與機器人的關(guān)系。
三維目標:知識和技能 1、了解地球自轉(zhuǎn)和公轉(zhuǎn)的方向及一些基本數(shù)據(jù):周期、速度、公轉(zhuǎn)軌道、黃赤交角。2、理解由于地球自轉(zhuǎn)運動造成的晝夜交替、地方時差,掌握時間的有關(guān)換算,能正確判斷晨昏線。3、理解地球自轉(zhuǎn)和公轉(zhuǎn)的關(guān)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(zhuǎn)現(xiàn)象,學(xué)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(jù)“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。