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人教版高中語文必修5《宇宙的未來》教案
（2）怎樣理解本文的一些相關論述？【明確】這是一篇科學講演，涉及較為復雜的背景知識。這些知識和講演的主題是密切相關的，如果不作必要的交待，講演的內容就會顯得抽象和單薄。如，談到天氣預報、大腦工作原理都具有混沌性質，來反襯宇宙在大尺度上是"平滑而非混沌"的；如，談到恒星的死亡（歸宿）引出黑洞，為宇宙中暗物質的存在尋找理論支持；如，談到現存宇宙對初始密度的極度敏感，引出了"人擇原理"等等。這些相關的論述，或從對立面凸顯觀點，或從縱深面強化觀點，使論證豐富多彩。（3）這篇講演在語言上具有怎樣的特點？【明確】講演是面對面的交流，這種交流又是單向度的，如果不注意講演的語言藝術，就達不到最佳的表達效果。這篇講演，除了推理嚴謹外，語言幽默也是其突出的特點。幽默的語言創(chuàng)造出一種輕松愉快的氣氛，更具有親和力，使所闡發(fā)的事理更容易為聽眾接受。
人教版高中語文必修5《逍遙游》教案
六、到此為止，我們了解到，作者對“笑”鯤鵬和別人的蜩與學鳩、斥鴳、宋榮子都一一作了否定。那么請大家討論一下，1、作者對鯤鵬和“知效一官，行比一鄉(xiāng)，德合一君，而征一國者”是不是肯定呢？明確：也都作了否定。否定后者好理解，關鍵是否定前者不好理解，因為“鯤鵬展翅”早已作為積極的意象被人們廣泛引用。但在本文中，作者在講述這一寓言故事時，突出的不是鯤鵬本身，而是風力，“故九萬里，風斯在下矣，而后乃今培風；背負青天，而莫之夭閼者，而后乃今將圖南”。對風力作用的突出，實際上就是對鯤鵬的否定。作者寫了“笑”的雙方，對“笑”的一方蜩與學鳩、斥鴳、宋榮子都作了否定，對被“笑”的一方鯤鵬和“知效一官，行比一鄉(xiāng)，德合一君，而征一國者”也都作了否定，并且對順便提及的野馬、塵埃、芥、大舟、朝菌、蟪蛄、冥靈、大椿、彭祖、列子等事物或者人物也都作了否定。這種全盤否定的態(tài)度，如果我們借用本文中的一個形象的詞語，可以說是：笑！是的，本文也可以說是：莊子“笑”萬物！
人教版高中語文必修4《蘇武傳》教案
二、課堂教學：1、學生簡介背景：教師掌握：漢武帝開始對匈奴進行長期的討伐戰(zhàn)爭，其中取得了三次具有決定意義的勝利，時間為公元前127年、前121年、前119年。匈奴的威勢大大削弱之后，表示愿意與漢講和，但雙方矛盾還是根深蒂固。所以，到公元前100年，蘇武出使匈奴時，卻被扣留，并迫使他投降?！短K武傳》集中敘寫了蘇武出使匈奴被扣留期間的事跡，熱烈頌揚了他在敵人面前富貴不能淫，貧賤不能移，威武不能屈，饑寒壓不倒，私情無所動的浩然正氣，充分肯定了他堅毅忠貞，大義凜然，視死如歸的民族氣節(jié)。2、作者介紹：班固（32——92年），字孟堅，扶風安陵（今陜西咸陽市東）人。東漢著名的史學家?！逗鬂h書·班固傳》稱他“年九歲，能屬文，誦詩賦。及長，遂博貫載籍，九流百家之言，無不窮究。所學無常師，不為章句，舉大義而已”。其父班彪曾續(xù)司馬遷《史記》作《史記后傳》，未成而故。
人教版高中語文必修4《李清照詞兩首》教案
2．【提問】《醉花陰》反映的是早年丈夫趙明誠游宦在外，作者一個人留在家中的生活狀況和內心感受。對于這樣的“閨怨”題材，應當怎樣評價呢？【明確】作者作為一個封建時代的婦女，能夠坦率地表達出自己對于丈夫深深的思戀之情，描寫了閨中生活的孤獨寂寞，這在當時乃是一種很大膽的行為。所以，有人批評說：李清照作詞是“無顧忌”地“肆意落筆”。其實，感情的充沛、真摯，敢于正面地展露自己的行為和內心世界，正是她創(chuàng)作成功的重要原因之一，也正是她的詞最值得珍視的地方。3．【提問】古人常常愛用花比喻人之美貌，如“芙蓉如面柳如眉”，“人面桃花相映紅”等，而李清照卻說“人比黃花瘦”，這樣的比喻有什么豐富的內涵？【明確】黃色的菊花不止外形上雅淡、清秀，與作者因相思而消瘦的體態(tài)相近，而且在菊花品格的傳統(tǒng)象征意義上，也酷似作者清高、淡泊的精神，這樣的比喻正比較恰切地反映了當時作者由于離開丈夫而孤獨、愁悶的生活狀態(tài)和內心情感。
人教版高中語文必修4《柳永詞兩首》教案
（一）上片：描寫杭州的自然風光和都市的繁華“東南形勝，三吳都會，錢塘自古繁華”，“東南形勝”，是從地理條件、自然條件著筆寫的。杭州地處東南，地理位置很重要，風景很優(yōu)美，故曰：“形勝”?！叭齾嵌紩?，是從社會條件著筆寫的。它是三吳地區(qū)的重要都市，那里人眾薈萃，財貨聚集，故曰：“都會”?！板X塘自古繁華”，這一句是對前兩句的總結，因為杭州具有這些特殊條件，所以“自古繁華”。下面就對“形勝”、“都會”和“自古繁華”進行鋪敘?！盁熈嫎?，風簾翠幕，參差十萬人家”是對“三吳都會”的展開描寫?！霸茦淅@堤沙。怒濤卷霜雪，天塹無涯”是對“東南形勝”的展開描寫。這里選擇了錢塘江岸和江潮兩種景物來寫?！笆辛兄榄^，戶盈羅綺，競豪奢”是對“錢塘自古繁華”的展開描寫。描寫了兩個方面：一是商業(yè)貿易情況——“市列珠璣”，只用市場上的珍寶，代表了商業(yè)的豐富、商業(yè)的繁榮；二是衣著情況——“戶盈羅綺”,家家披羅著錦?！案偤郎荨?，又總括杭州的種種繁華景象。
人教版高中語文必修3《琵琶行 并序》教案
9、在樂曲終了之后，詩人以“東船西舫悄無言，唯見江心秋月白”兩句結尾，這兩句作用如何？明確：詩人沒有直接寫聽者的熱烈反響以說明琵琶女技藝非凡和樂聲的感人至深，否則過于直白就不含蓄，不含蓄也就顯不出深沉了。用“東船西舫悄無言”的寂靜無聲，反襯“有聲”的音樂效果，可謂“此時無聲勝有聲”了。人們無聲地沉浸、陶醉在藝術的享受之中，那深深打動人的樂聲仿佛繚繞迂回耳際，不由得使詩人想到了自己浩茫的心事，引起情緒上的波瀾。在這片刻的沉寂中，只見一輪迷蒙的冷月蕩漾在江心的微波之中，它提醒詩人從樂聲中回到現實中來。這句景物描寫點染烘托了濃重的氛圍，與復雜的樂聲融為一體，共同表現了琵琶女與詩人息息相通的復雜情感，是那么的憂憤、哀怨凄楚、蒼涼，給整個音樂形象補足了畫龍點睛之筆。
人教版高中語文必修3《宇宙的邊疆》教案
一、內容與解析從古代運用天文方法確定耕作時間，到現代對宇宙形成演變的種種假設，對宇宙的探索，已經成為人類生活的一部分。宇宙從何而來，向何而去，人類從何而來，向何而去，這些基本問題不僅具有科學意義，而且具有哲學的意味。以前教材中沒有出現過解說詞，但是在日常生活中，我們經常接觸到各類解說詞，可以讓學生聯(lián)系實際，了解解說詞的特點；也可以找來其他科學電視片，結合視覺畫面，讓學生全面地感受解說詞的特點。二、教學目標及解析（一）教學目標1．引導學生聯(lián)系實際，了解解說詞的特點。2．引導學生了解一些有關宇宙的基礎知識。3．引導學生借助文中精辟的議論和熱烈的情感抒發(fā)，了解作者對宇宙和人類的思考，并引發(fā)自己的思考。
人教版高中語文必修4《張衡傳》教案
采用明段意分段法：先逐段概括段意，然后用合并同類項法把相關聯(lián)緊縮密的自然段合在一起。全文五個自然段中，二、三、四自然段講的都是張衡取得的科學成就，自然應合為一大段。這樣，就理清了文章的結構。全文可分為三個部分：(1)寫張衡的品格和文才①(2)寫張衡在科學技術上取得的成就(②③④)(3)寫張衡的政治才干(⑤)第二部分是文章的重點，又可分為兩層：一是仕途情況，以及制作渾天儀和著《靈憲》、《算圖論》的情況；一是專門介紹候風地支儀。顯然，后者又是第二部分的重點。作者這樣處理文章的詳略安排。無疑是非常正確的，因為張衡一生有多方面的才能和成就，而他在科技方面的才能和創(chuàng)造發(fā)明最為突出，理應成為本文記敘的重點。四、小結1.了解全文的內容和結構，掌握明段意分段法。2.了解文章的詳略安排。五、作業(yè)
人教版高中語文必修4《長亭送別》教案
三．分析第三部分：1．夫妻贈詩表現了二人怎樣的心情？提示：崔鶯鶯告誡張生切勿忘記她；張生則發(fā)誓永無別戀。這充分展示了二人深厚的情誼。2．怎樣理解[耍孩兒]中的典故？提示：“紅淚”借王嘉《拾遺記》的典故，司馬青衫借白居易《琵琶行》的典故，表現主人公因離別而生的傷心之情。“伯勞飛去燕西歸”則用牛郎織女的典故表現兩人纏綿難舍的心情。3．[五煞]表明了主人公怎樣的心情？提示：對張生的生活的關心，千叮萬囑，真情自現。4．[二煞]中所用是幾個典故？這些典故的作用是什么？提示：三個典故，見課本。其作用是表明崔鶯鶯對張生的擔心。四．分析第四部分：1．[一煞]中再寫環(huán)境，其作用是否與先前所寫相同？提示：稍有不同，這里是表現崔鶯鶯目送張生遠去時那種凄愴悲苦的眷戀之情。以所見之物，寫內心深藏之情。2．[收尾]中寫‘殘照’其含義是什么？提示：以“殘照”表現內心的悵惘失意之情。
人教版新課標高中地理必修2第一章第一節(jié)人口的數量變化教案
材料四：印度提倡“只生一個好”——鼓勵三人小家庭 生男生女都一樣材料五：印度尼西亞《人口發(fā)展與幸福家庭法》材料六：我國基本國策 計劃生育（小結）通過對以上材料的分析我們可以得出這樣的結論，不同的國家應該采取不同的人口政策，對與發(fā)達國家來說人口增長緩慢，應采取鼓勵生育，吸引移民的措施；發(fā)展中國家人口增長較快，實行控制人口的政策已經迫在眉睫。不論是發(fā)達國家還是發(fā)展中國家共同的目標就是實現環(huán)境人口和社會經濟的協(xié)調發(fā)展?！菊n堂小結】這節(jié)課我們主要學習了人口的自然增長，影響人口自然增長的因素有哪些？（人口的自然增長率和人口的基數）世界人口的數量在不同的歷史時期表現出不同的特征，同一歷史時期的不同地區(qū)，人口數量的增長又有不同的特點。面對不同的人口形勢，各國應采取不同的人口政策。
人教版高中地理必修1第一章第一節(jié)宇宙中的地球教案
【總結講解】地球為生命物質的存在提供了三個最優(yōu)越的條件，這也是其它行星不具備的條件——（1）日地距離適中(1．496億km)，使地表平均氣溫為15℃，有利于生命過程的發(fā)生和發(fā)展；地球上的溫度，還有利于水的液態(tài)存在。適合生物呼吸的大氣： （2） 地球的體積、質量適中，吸引大量氣體聚集在地球周圍，又經過漫長的演化，形成了以氮、氧為主的適合生物呼吸的大氣。（3）海洋的形成： 由于地球內部放射性元素衰變致熱和原始地球重力收縮及地球內部的物質運動等形成了原始大洋，地球最初的單細胞生命就出現在大洋中。（備注：此部分可以模擬演示或講解地球存在生命的溫度、大氣、水等條件；假設地球溫度過高或過低對地球生命的影響；引導學生分析地球大氣、溫度與地球水的關系）【板書】1、日地距離適中2、地球的體積、質量適中3、液態(tài)水的存在【啟發(fā)提問】 宇宙中是否只有地球上存在有生命物質？
新人教版高中英語必修3Unit 4 Space Exploration-Reading For Writing教學設計一
另一方面，其余的人反對這個計劃，因為它可能會導致一些不好的影響。7.I hold the belief that space exploration not only enable us to understand how the universe began but also help us survived well into the future.我堅信探索太空不僅能夠使我們了解宇宙的起源而且能夠幫助我們更好地走進未來。8.I think we should spend more time and money exploring space so as to provide new and better solutions to people's shortterm and longterm problems.為了給人類的短期和長期問題提供更新和更好的解決方法，我認為我們應該花更多的時間和金錢來探索太空。9．From my point of view，it is wrong of young people to depend on their telephones too much，which may do harm to both their physical and mental health.在我看來，年輕人過度依賴手機是不對的，因為它們可能會對他們的身心健康都有害。最近你班同學就“人類是否應該進行宇宙探索”這個問題進行了激烈的討論。有人認為，探索宇宙不僅讓人類更好地了解宇宙的發(fā)展，還可以用來指導農業(yè)生產，以及把一些探索太空的高新技術用于現實生活；也有一些人認為探索太空花掉了大量的人力物力；影響了人們的生活水平。請你根據以下情況寫一篇報告并發(fā)表自己的觀點。注意：1.寫作內容應包括以上全部要點，可適當發(fā)揮，使上下文連貫；
新人教版高中英語必修3Unit 5 the value of money-Reading For Writing教學設計一
【參考范文】Narrator：(Henry is smiling as he leaves the restaurant. As he is walking down the street, he sees a sign for a place that cuts hair. He decides to get it cut. )H＝Henry；B＝Barber；R＝rude manH：Good afternoon, I'd like to get a 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. (In comes the rude man. )R：Hey you there. I need a haircut quickly. Can you do me straightaway?B：All right, then, get in the chair and I'll see what I can do. R：Thank you. (sits down in one of the barber's chairs)H：Excuse me, but I was here first. Aren't you going to do my hair first?B：This man's in a hurry. H：Well so am I！I insist that you cut my hair first. B：OK, but I'll have to be quick. This gentleman is waiting. H：Thank you. (They both become quiet. 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. R：You're that Mr Adams! Well，I'm glad I waited or I might never have known it was you. B：Why, Mr Adams, please don't worry！(wearing a big smile) Nothing to worry about！Nothing at all!Please come back any time, even if you only need too little hairs cut！It will be my honour to serve you!
新人教版高中英語必修3Unit 4 Space Exploration-Listening&Speaking&Talking教學設計一
Listening and Speaking introduces the topic of “talking about how to become an astronaut”. This period is aimed to inform students some details about the requirements of being an astronaut. Students can be motivated and inspired by the astronauts. Teachers ought to encourage students to learn from them and let them aim high and dream big.Listening and Talking introduces the theme of "talk about life in space". This part also informs students more details about life in space and can inspire students to be curious about this job. 1. Guide students to listen for numbers concerning dates, years and ages etc2. Cultivate students' ability to talk about how to become an astronaut and life in space ; 3. Instruct students to use functional sentences of the dialogue such as “ first of all, I am not sure, so what might be .. I guess.. I wonder…I am curious…)appropriately.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 become a qualified astronaut and describe the life in space.Part 1: Listening and SpeakingStep 1: Lead inPredictionThe teacher can ask students to predict what the listening text is about by looking at the pictures.About how to become an astronaut./the requirements of an astronautStep 2: Then, play the radio which is about an interview a. And after finishing listening for the first time, the students need to solve the following tasks.
人教版新課標PEP小學英語三年級上冊Happy Birthday（全英文版）說課稿
1. Do some exercise on the paper. There are four kinds of exercise here. The exercise 1 is to develop Ss’ ability of listening. Exercise 2 is to practice Ss’ ability of knowing the words. Exercise 3 is to develop Ss’ ability of speaking numbers and letters. Exercise 4 is to make Ss know the words and letters well. These exercises can consolidate the new knowledge from different styles of problems.2. Then tell Ss that we can sing the numbers like “ Do, re, mi, fa, so, la, ti, do” and let them listen to a song named “Do, Re, Mi”. Add some extra knowledge so that Ss will be glad to see that the numbers can be used in another way.Step 4 Homework1.Read the numbers from 1 to 7 and 7 to 1 five times.2.Read the letters “u, v, w” five times follow the tape.Reading is a useful way for the Ss of Grade One to practice the knowledge. Ask Ss to imitate reading from the tape in order to make Ss have a good habit of listening and let them have a better pronunciation.Step 5 Board writingI ‘ll put the seven numbers like a scale(音階)as I’ll let Ss know that we can sing out the numbers. When it comes to listen to the song, I ‘ll draw a musical note on Bb. Unit 9 Happy birthday!sevensixfivefourthree U u V v W wtwo pupil five windowoneThat’s all for my class designing. Thank you for listening!
新人教版高中英語必修3Unit 1 Festivals and celebrations-Discovering Useful Structure教學設計
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、特征和狀態(tài), 其作用相當于形容詞; 另一種具體說明主語的內容, 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
新人教版高中英語必修3Unit 1 Festivals and Celebrations-Listening &Speaking＆Talking教學設計
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 for writing教學設計二
Step 3 Analyzing article structureActivity 31. Teachers raise questions to guide students to analyze the chapter structure of this diary and think about how to describe the festival experience. (1)What should be included in the opening/body/closing paragraph(s)?(2)How did the writer arrange his/her ideas?(3)What kind of interesting details did the writer describe?(4)How did the writer describe his/her feelings/emotions during the event?2. Students read and compare the three sentence patterns in activity 2. Try to rewrite the first paragraph of the diary with these three sentence patterns. After that, students exchange corrections with their partners. Such as:●This was my first time spending three days experiencing the Naadam Festival in China’s Inner Mongolia Autonomous Region and it was an enjoyable and exciting experience. ●I'll never forget my experience at the Naadam Festival because it was my first time to watch the exciting Mongolian games of horse racing, wrestling, and archery so closely. ●I'll always remember my first experience at the Naadam Festival in China’s Inner Mongolia Autonomous Region because it was so amazing to spend three days witnessing a grand Mongolian ceremony. Step 4 Accumulation of statementsActivity 41. Ask the students to read the diary again. Look for sentences that express feelings and emotions, especially those with the -ing form and the past participle. Such as:● …h(huán)orse racing, wrestling, and archery, which are all so exciting to watch. ● some amazing performances● I was surprised to see…● I was a little worried about. . . ● feeling really tiredOther emotional statements:●I absolutely enjoyed the archery, too, but the horse races were my favourite part. ●I'm finally back home now, feeling really tired, but celebrating Naadam with my friend was totally worth it. ●He invited me back for the winter to stay in a traditional Mongolian tent and cat hot pot. I can’t wait!2. In addition to the use of the -ing form and the past participle, the teacher should guide the students in the appreciation of these statements, ask them to memorize them, and encourage them to use them reasonably in writing practice.
人教版新課標高中地理必修2第一章第三節(jié)人口合理容量教案
生：環(huán)境承載力是指環(huán)境能持續(xù)供養(yǎng)的人口數量。師：對了。但是有同學仍然會感到這是一個很抽象的概念。下面我們具體來了解什么是環(huán)境承載力。我們可以從兩個部分去理解：一、環(huán)境，它主要是指環(huán)境的單個要素（如：土地、水、氣候、植被等。）及其組合方式。二、是承載力，它指在特定的條件下，具體某事物能承受的某種活動的最大值。那環(huán)境承載力的科學定義是怎樣表達的呢？生：環(huán)境承載力是指某一時期，某種狀態(tài)條件下，某地區(qū)環(huán)境所能承受的人類活動作用的閾值。師：很對。 我們可以用一個生動的例子來說明。一只木桶里面的水的多少在底面積固定不變的情況下是由哪塊木板來決定？生：最短的那塊。師：確實如此。這就是我們平常所講的 “木桶效應”。那影響環(huán)境承載力的大小也是由環(huán)境個要素里面最緊缺的那個要素來決定的。下面我們用一個例子來印證一下。
人教版新課標高中地理必修2第一章第二節(jié)人口的空間變化教案
1．促使美國成為一個移民國家的因素是：①美洲屬于未開發(fā)的新大陸，需要大量的勞動力；②歐洲失業(yè)工人和破產農民增加，人們?yōu)榱俗非蟾玫慕洕鲞w往美洲；③新航線的開辟為人們順利遷移掃除了障礙；④殖民擴張是人口遷移的促進因素，加快了人口遷移的過程。導致美國人口在本土范圍內頻繁遷移的原因，歸納起來有：第一次人口遷移是戰(zhàn)爭因素，第二次是城市化；第三次是自然環(huán)境、經濟環(huán)境的變化；第四次是經濟格局的變化，即西部和南部新資源的發(fā)現和新興工業(yè)的發(fā)展。2．我國古代的人口遷移，深受統(tǒng)治者及其行政力量的束縛。封建帝王為了加強本國的經濟和軍事實力，對人口遷移嚴加控制。只有當戰(zhàn)亂發(fā)生的時候，這種控制才得到削弱，人們?yōu)榱硕惚軕?zhàn)亂，尋找安定的生活環(huán)境，不得不進行大規(guī)模的遷移。我國近幾十年的人口遷移主要是由生產資料和勞動力數量上的地區(qū)分布不平衡造成的，是經濟因素在起主導作用，與古代的人口遷移截然不同。
