? Could you offer me some kind of work here?? I don’t want your charity, I just want an honest job.? Careless: I landed in Britain by accident.Step 7:Consolidation.? Find Henry? Roderick and Oliver were I .making a bet when they saw Henry, a poor young man. ? Know Henry? About a month ago, Henry was sailing and later he found himself carried out to sea by a strong wind. Fortunately, he 2.was spotted by a ship. And it was the ship that brought him to 3.England? Offer money to Henry ? Oliver and Roderick gave Henry a letter and told him that there was money in it. They 4.persuaded him to accept it, and made him 5.promise that it wouldn't be opened until 2 o'clock.Step 8:Language pointsa large amount of: a large quantity of; a great deal ofe.g. They bought a large amount of furniture before they moved their new house.make a bet: make an arrangement to risk money, etc. on an event of which the result is doubtful.e.g. We made a bet on the result of the match.permit sb to do something: allow somebody to do somethinge.g. My mother doesn’t permit me to ride in the street after it rained.by accident: as a result of chancee.g. I only found it by accident.stare at: look at somebody or something with the eyes wide open in a fixed gaze( in astonishment, wonder, fear, etc)to be honest: to tell you the truth; to be franke.g. To be honest, I don’t think we have a chance of winning.Step7 Homework:What do you think will happen to Henry? Will the bank-note help him or get him into trouble?
2. 您能看到, 我頭發(fā)太長了。You can see that my hair is much too long.3. 無論什么時候, 只要您想回來就回來。Please come back whenever you want.4. 您僅有很少的頭發(fā)要理! You only have too little hair to cut !5. 為您服務是我的榮幸!It is my honour to serve you!Step 9 Writing(Henry is walking down the street when he sees a sign for a place that cuts hair. He decides to have it cut. )H=Henry B=BarberH: Good afternoon, I’d like to have my hair 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. (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. B: Please don’t worry! (wearing a big smile) Nothing to worry about! Nothing at all! Please come back whenever you want, even if you only have too little hair to cut! It will be my honour to serve you!Step 10 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Are all the elements of a play included and in good order ?2. Do the character use suitable language ?3. Are the stage directions clear and useful ?4. Is the plot clear and exciting enough ?
【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!
導語在必修第一冊中,我們研究了函數(shù)的單調(diào)性,并利用函數(shù)單調(diào)性等知識,定性的研究了一次函數(shù)、指數(shù)函數(shù)、對數(shù)函數(shù)增長速度的差異,知道“對數(shù)增長” 是越來越慢的,“指數(shù)爆炸” 比“直線上升” 快得多,進一步的能否精確定量的刻畫變化速度的快慢呢,下面我們就來研究這個問題。新知探究問題1 高臺跳水運動員的速度高臺跳水運動中,運動員在運動過程中的重心相對于水面的高度h(單位:m)與起跳后的時間t(單位:s)存在函數(shù)關(guān)系h(t)=-4.9t2+4.8t+11.如何描述用運動員從起跳到入水的過程中運動的快慢程度呢?直覺告訴我們,運動員從起跳到入水的過程中,在上升階段運動的越來越慢,在下降階段運動的越來越快,我們可以把整個運動時間段分成許多小段,用運動員在每段時間內(nèi)的平均速度v ?近似的描述它的運動狀態(tài)。
Example:One day, a poor boy who was trying to pay his way through school by sending newspapers door to door found that he only had one dime(一角)left. He was so hungry that he decided to beg for a meal at the next house.However, he lost his nerve when a lovely young woman opened the door. Instead of a meal he asked for a drink of water. She thought he looked hungry so she brought him a large glass of milk. He drank it slowly, and then asked, “How much do I owe you?” “You don’t owe me anything,” she replied, “Mother has taught me never to accept pay for a kindness.” “Then I thank you from the bottom of my heart.” With these words, Howard Kelly left that house.Years later the woman became badly ill and was finally sent to the hospital in a big city. Dr. Howard Kelly, now famous, was called in. When he heard the name of the town she came from, a strange light filled his eyes. Dressed in his doctor’s clothes, Dr. Kelly went into her room and recognized her at once. From that day on, he gave special attention to her, and decided to do his best to save her life.At last the woman was saved. Dr. Kelly asked the business office to pass the final bill to him. He looked at it and then wrote something on the side. The bill was sent to the woman’s room. She was afraid to open it because she was sure that it would take the rest of her life to pay for it off. Finally she looked, and the note on the side of the bill caught her attention. She read these words: “Paid in full with a glass of milk, Dr. Howard Kelly.” Tear of joy flooded her eyes.
Step 4 PracticeRead the conversation. Find out which words have been left out.Justin: Linlin, I’m going to Guizhou Province next month. I’m super excited! Any recommendations for places to visit?Linlin: Wow, cool! Guizhou is a province with a lot of cultural diversity. Places to visit...well, definitely the Huangguoshu Waterfall first.Justin: What’s special about the waterfall?Linlin: Well, have you ever heard of the Chinese novel Journey to the West ?Justin: Yes, I have. Why ?Linlin: In the back of the waterfall, you will find a cave, which is the home of the Monkey King.Justin: Really? Cool! I’ll definitely check it out.Linlin:And I strongly recommend the ethnic minority villages. You’ll find Chinese culture is much more diverse than you thought.Justin:Sounds great, thanks.Answers:Justin: Linlin, I’m going to Guizhou Province next month. I’m super excited! Do you have any recommendations for places to visit?Linlin: Wow, that’s cool! Guizhou is a province with a lot of cultural diversity. What are some places to visit in Guizhou ? Well, definitely the Huangguoshu Waterfall is the first place to visit in Guizhou Province.Justin: What’s special about the waterfall?Linlin: Well, have you ever heard of the Chinese novel Journey to the West ?Justin: Yes, I have heard of the Chinese novel Journey to the West . Why do you ask if I have heard of the Chinese novel Journey to the West?Linlin: In the back of the waterfall, you will find a cave, which is the home of the Monkey King from Journey to the West.Justin: That’s really true? It’s Cool! I’ll definitely check it out.Linlin:And I strongly recommend the ethnic minority villages on your trip to Guizhou Province. You’ll find Chinese culture is much more diverse than you thought it was.Justin:This all sounds great, thanks.
Step 4: Listen again and decide if the following statements are true (T) or false (F).1 It was the first time Chen Liyan's story was reported. T口 F口2 Chen found 10,000 yuan in a small plastic bag in Taiyuan railway station口 F口3 Wang Zheng apologized to Chen because he couldn't offer her more money. T口 F口4 Chen took out a large loan to cure her daughter, T口 F口5 Wang set up a fundraising website for Chen's daughter after Chen told him about her situation. T口 F口Step 5:After listening, discuss the questions.1 What kind of person do you think Chen Liyan is?Chen Liyan is generous and honest because she returned a large sum of money to the owner.2 Did Chen return the money because she didn't need it?No. She returned the money because it was the right thing to do. Evidence for this is that she refused to accept the reward money because she felt that it had not been earned. 3 Is it common for people to do what Chen did?It depends on the culture. In some countries it is quite common to return money that has been found. In other countries, people believe "Finders are keepers!" 4 How did Wang Zheng feel about the return of his money?He must have been very happy and relieved to have gotten his money back. We know this because he thanked Chen repeatedly and even offered her a reward.5 Why did Ma Dongbao tell Wang about Chen's family?He must have had great sympathy for Chen and her daughter and wanted to help them.'We know this because he arranged help for them. 6 How did the news reporter feel about Chen's actions?The news reporter felt that it showed that money wasn't the most important thing in life. We know this because the reporter told us that this is what Chen believes. and then said, “that's a great attitude to take."
Everybody wants to get wealth.In today’s material world,making money or becoming wealthy symbolizes a person’s success and capability. Many people just make every effort, pay any price to attain greater wealth. With money,they can buy nice, large apartments in nice neighborhood. With money they can own luxurious cars. Wealth seems to bring all happiness in life.But is wealth the only road to happiness? Not really. There are many things in the world, which are beyond the means of money, such as friendship, love, health and knowledge. People are so preoccupied with struggling for money that they have no time or would not take the time to form or maintain friendship. What happiness can they feel living as lonely miserable creatures without love or friends in the world even if they accumulate tremendous wealth?In my opinion, people can’t do anything without money, but money is not everything. What money will bring you depends on your personal belief and goal in life. If you are kind enough to help others, especially the poor, money is a good thing to you. With it, you can do much more for the benefit of people and your country, and it will add to your own happiness. If you want money just for your own needs, you’ll never be satisfied or happy. In a word,you should have money spent for more people. Only then can money be the source of your happiness.Step 8 Homework4 students in a group, one acts Roderick, one Oliver, one servant and the fourth one acts Henry Adams, then listen to the tape, pay more attention to the difference between American English and British English in pronunciation, stress, tone.
四.設計反思我在設計本課時,希望通過情境的創(chuàng)設充分再現(xiàn)歷史,并利用多媒體輔助教學,破重點、化難點,讓學生主動參與到學習過程中,從而突破狹小的教室空間,讓學生真正做到感知歷史,立足現(xiàn)實,展望未來。自主,交流、合作、探究是課程改革中著力倡導的新型學習方式。課堂教學中如何開展小組合作的探究學習存在著很多困難,首先是課堂教學時間有限,如何體現(xiàn)面向全體,給每個學生以機會?再次,歷史問題的討論只能依托于史料才能使討論不淪為空談,課堂上通過網(wǎng)絡提供大量的史料(文字、圖片或其他),勢必不能有充分時間讓學生閱讀分析。如何解決這些問題呢?措施一:要形成較固定的歷史學習合作小組。選定一位同學擔任組長,負責協(xié)調(diào)措施二:要設置有利于學生探究的問題情境措施三:要把課堂教學與課外學習結(jié)合起來。在課前就印發(fā)相關(guān)的材料,或引導學生去查閱相關(guān)的資料,讓學生有個充分的閱讀、思考、交流的時間,是保證課堂上小組交流能成功實現(xiàn)的一個前提
課前活動:分成四組,對南京三個住房地段進行調(diào)查,新街口夫子廟、板倉、仙林,對住房居民進行問卷調(diào)查,自行設計調(diào)查問卷,分析該地段的房價要求,居民的要求,居民為何要在該地段購買住房,基礎設施設置等等其它與居民購房有關(guān)的因素?!粼O計意圖:利用課前小組探究形式對所學問題進行相關(guān)調(diào)查,不僅讓學生掌握知識了解知識來源于社會還能培養(yǎng)學生深入生活交際表達能力以及合作探究能力;3.問題設計同學們,不知道你們在調(diào)查過程中是否發(fā)現(xiàn)一個問題,郊區(qū)的房子,特別是別墅,都是些高檔居所,許多有錢人的居住場所,那為什么會這樣呢?伴隨著城市化進程中居民都往城里擠,為什么還會有許多有錢人往郊區(qū)搬呢?這就是我們今天要研究的第二個問題:逆城市化。◆設計意圖:承轉(zhuǎn)過渡知識,從購房選擇因素的學習過渡到郊區(qū)化的學習,同時培養(yǎng)學生發(fā)現(xiàn)問題的能力,給學生以啟迪。
第11段很短,只點出了這是“在婦女身上搞不育試驗的地方”,但在最末又加了一句“否則他會羞紅了臉的”,這是為什么?那肯定是一個極為骯臟,極為殘酷的地方。據(jù)資料記載:當時的希特勒制定一項令所有被征服或占領(lǐng)國家的民族充當奴隸并且逐漸消亡的隱密性種族滅絕計劃——高效率、大規(guī)模的強制絕育。為此,數(shù)以百計的納粹醫(yī)生、教授、專家甚至護士,在行政管理專家的通力合作下,相繼提出了幾十種絕育方法,十余種實施方案,并且在奧斯維辛、拉芬斯布呂克、布亨瓦爾特、達豪等十多個大型集中營內(nèi)對數(shù)以萬計的猶太、吉普賽囚犯、因從事抵抗運動而被捕的政治犯和男女戰(zhàn)俘進行了殘酷的手術(shù)試驗,造成他們大量死亡或者終身殘疾、終身不育。這樣殘酷的毫無人性的手段,任誰也不愿看到。
二、說學生本屆高一學生經(jīng)過了三年初中課改,在心理上,他們渴望表現(xiàn)的欲望和自主探究的欲望比較強烈,對有興趣的知識表現(xiàn)出高度地熱情,并具有一定的團結(jié)協(xié)作能力,但還是應該正視一個并不樂觀的現(xiàn)實——在寫作方面,學生知識還停留在簡單的記敘及表達方式綜合運用上,至于巧妙構(gòu)思、謀篇布局很是空白。即便已經(jīng)經(jīng)過高中一個學期的學習,但還是有大部分學生依然基礎較為薄弱,甚至出現(xiàn)不知從何下筆的現(xiàn)象。三、說教法與學法“老師搭臺,學生唱戲”1、教法:本課將安排兩課時(一課時學習一課時練筆),采用 PPT 多媒體課件教學,嘗試用角色扮演法、圖片展示法和多媒體教學等方法,教學中應該重視學生的參與性和探究性。2、學法:學生應該充分利用多角度創(chuàng)設的學習情境來激發(fā)自身學習的興趣和熱情,分組討論,小組互助等形式讓學生積極自主參與、進行問題探究學習。理論依據(jù):建構(gòu)主義理論“學生是學習的中心”的闡釋,教師應該做學生主動建構(gòu)意義的幫助者、促進者。
當代社會生活的變化比以往任何時代都要快。語言尤其是詞匯記錄了這些發(fā)展變化,因而也涌現(xiàn)了大量的新詞新語。據(jù)統(tǒng)計,近幾年每年大約要出現(xiàn)1000個左右的新詞新語,而字典、詞典的多次修訂、增補就反映了這種情況。但相對來說,也有一些流行語又逐漸受到冷遇,甚至退隱。為了更好的對新詞新語與流行文化作一番檢視與探究,那讓我們考察一下它們是怎么產(chǎn)生的吧?老師先給同學們列舉四種途徑:大屏幕3。同學們能再舉出以上途徑的一些例子嗎?老師列舉(4)其實不只這些,那還有哪些途徑呢?找同學說并舉例。說的非常好,請同學們看老師的例子,總結(jié)(5)。從新詞新語的產(chǎn)生途徑可以看出,這些鮮活得像畫一樣的新詞就是這個時代跳動的血小板,它涉及當代社會的重大事件、現(xiàn)象與時弊,以及人們?nèi)粘I畹母鱾€層面如人生意義、生活方式、愛情、友情、就業(yè)、消費、時尚等,時代性強,傳播面廣,反映著當代社會時局與人們文化心態(tài)的變化。
師:“兩開”是什么意思?。孔⒔饫锸窃趺凑f的?第二次開,也就說他在這個地方已經(jīng)待了兩年了,這里是他回家的路途中,是不是?路途中他停留了兩年時間。好的,你先請坐。你覺得殘菊不能兩開,在理解上好像存在一些誤差。趙勇:因為菊花古往今來代表著對家鄉(xiāng)的思念。師:菊花代表對家鄉(xiāng)的思念?(下面學生齊笑)這種說法牽強了些,菊花在古代象征著高潔,梅蘭竹菊是四君子嘛。趙勇:寫這首詩時,他已經(jīng)打算回故鄉(xiāng)了,所以不應該寫“殘菊”,寫“殘菊”的話……師:事實上,他回不了故鄉(xiāng)。好的,請坐。再想想,“殘菊”意味著什么?破敗?!皡簿铡蹦??茂盛。那這里說“兩開他日淚”,“兩開”是什么意思?開了兩了次了,這說明他在這里已經(jīng)待了兩年了。那“他日淚”又是什么意思?趙勇:應該是他看到這里的菊花開得這么茂盛,就想到了故鄉(xiāng)的菊花也是開的茂盛的時候。如果是“殘菊”的話,那故鄉(xiāng)的菊也會開得很殘敗。(下面學生齊笑)
1、漢武帝尊儒的措施:(1)政治方面:起用很多儒學家參與國家大政。他規(guī)定,地方定期選出孝子、廉吏當中央任官,甚至還擢升平民、儒士為相。這明顯擴大了官員的隊伍,提高了官員的文化素質(zhì),鞏固了封建統(tǒng)治基礎,成為漢武帝文治武功的重要組成部分。也給后世封建王朝在用人方式方法上面提供了寶貴的借鑒和啟迪。(2)思想方面:采納董仲舒的建議,“罷黜百家 獨尊儒術(shù)”(3)教育方面:儒家經(jīng)典“五經(jīng)”為國家規(guī)定的教科書。興辦太學和設立地方學校進行儒學教育。公元前136年,漢武帝正式規(guī)定《詩》、《書》、《禮》、《易》、《春秋》為“五經(jīng)”;前124年,又在長安興辦太學,規(guī)定太學生員為博士弟子,一律由儒家五經(jīng)博士負責教授,學完經(jīng)考試合格后即可到政府任官。這是封建國家利用政權(quán)的力量興辦教育、提倡儒學,其必然對整個社會的教育事業(yè)有一定的導向作用。
1)他們在初中的生物學學習中已具備了一定的關(guān)于光合作用的基礎知識,也做過“綠葉在光下制造淀粉”這個實驗。2)他們具備物質(zhì)轉(zhuǎn)變和能量變化等相關(guān)的化學知識。3)在前面的《降低化學反應活化能的酶》一節(jié)的學習中已經(jīng)學習過簡單的對照實驗和相關(guān)的實驗設計原則,使本節(jié)課最后的實驗設計得以順利進行。4)他們具有一定的 分析問題的能力,實施問題探究教學是可行的。三、教法和學法根據(jù)上述對教材和學生的分析,本節(jié)采用以下教法和學法:1)實驗法:以實驗說明結(jié)論。生物學的教學就是實驗的教學過程,實驗的展示形式有學生分組實驗、老師示范實驗、動畫和圖片演示實驗等,讓實驗現(xiàn)象說明問題,而不是直接讓學生記住結(jié)論。2)問題探究教學發(fā):以問題引發(fā)興趣。整個教學過程要設置好問題,層層展開,層層遞進,讓新知識與舊知識融為一個整體,讓學生在步步上升中攀登到知識的頂峰。3)比較學習法,同時采用多媒體輔助教學,解決光合作用抽象的過程。
1、教材內(nèi)容本節(jié)是人教版普通高中標準實驗教科書生物必修2《遺傳與進化》的第五章《基因突變及其他變異》的第一節(jié)內(nèi)容。本節(jié)介紹了可遺傳變異的兩種類型:基因突變和基因重組,其中基因突變從實例對鐮刀型細胞貧血癥的分析入手,引入基因突變的概念,然后詳細闡述基因突變的原因和特點、意義。在闡述自然狀態(tài)下基因突變的頻率很低時,教材用實例說明在一個足夠大的群體中,即使基因突變頻率很低,突變個體仍然會占有一定的數(shù)量。這個實例體現(xiàn)了生物在進化過程中“變”與“不變”的平衡,有助于學生理解基因突變在生物進化中所占有的重要地位。在基因重組部分,教材設置了“思考與討論“的欄目,旨在讓學生利用數(shù)學方法,通過計算,體會基因重組機制提供的極其多樣的基因組合方式,從而幫助學生理解基因重組是生物多樣性形成的主要原因。正文中則簡要闡述了基因重組的概念、類型和意義。本節(jié)內(nèi)容引導學生從分子水平上理解遺傳物質(zhì)如何引起生物變異的。
投影上海市的衛(wèi)星城鎮(zhèn)建設、交通改善圖以及住房圖等,探討上海為解決城市化的問題做了哪些方面的工作?進一步引導思考總結(jié)對于城市化帶來的問題,除了上海市的做法,你還有什么想法?◆設計意圖:借上海的例子一方面引導學生解決問題的思路,讓學生自己掌握城市化問題及措施,活躍思維;另一方面幫助學生樹立學習優(yōu)秀的意識;4.活動設計.未來展望——生態(tài)城市課本38頁的活動,結(jié)合合肥市環(huán)城公園,解釋生態(tài)城市?!粼O計意圖:進一步讓學生認識到人地協(xié)調(diào)的重要性,牢固樹立可持續(xù)發(fā)展的觀念。5.活動設計分析南京的城市化過程中存在哪些問題,除了共性外,還有沒有自己的個性問題?對于問題展開討論,并提出相應的解決措施?!粼O計意圖:結(jié)合身邊的地理,落實鄉(xiāng)土地理的教育,激發(fā)學生熱愛家鄉(xiāng),從身邊的環(huán)境小事做起,落實環(huán)境教育。
4、【自主探究】巴山夜雨的成因③材料三:三國時期,諸葛亮于農(nóng)歷6月的一天,在葫蘆峪設下伏兵,打算用火攻全殲司馬懿。這一天,晴空萬里暑熱難耐,真乃火攻之良機。諸葛亮依計將司馬懿之眾誘入谷中……然而,正當大火沖天,司馬懿全軍行將覆滅之時,一場大雨不期而至,大雨澆滅了諸葛亮扶漢反魏的壯志,使他喊出了“謀事在人,成事在天,不可強也”的千古悲歌?!驹O計理念】前后呼應,發(fā)散思維。通過自主探究,學生各抒己見,完成對熱力環(huán)流整個知識框架的一個總結(jié),既考查了學生的課堂學習效果,又鍛煉了學生知識的遷移能力,并認識生活中的地理規(guī)律,用生動的語言拉近學生與大氣理性知識的距離,體會到地理學科的重要性?!咎釂枴咳绻麑滋鞊Q成夏季,將夜間換成冬季,情況又會怎樣?城市與郊區(qū)之間也存在著熱力環(huán)流——城市風,它們是怎樣形成的?了解城市風的出現(xiàn)有何重要意義?如果地球上在赤道和兩極之間存在熱力環(huán)流,這個熱力環(huán)流應該怎樣?這幾個問題,請大家課后慢慢思考。
(一)教材的地位與作用本節(jié)教材包括三方面的內(nèi)容,(1)全球氣候在不斷變化之中。(2)全球氣候變化的可能影響。(3)氣候變化的適應對策三方面說明氣候變化及其對人類活動的影響。從標準的要求看,學習的重點不在全球氣候變化本身,而是把全球氣候變化看作是客觀存在的事實,從而探討全球氣候變化對地理環(huán)境及人類活動的影響。從資料中可以看出本節(jié)教學內(nèi)容涵蓋的時空跨度非常大,思維的鏈索很長很廣,許多問題涉及到學科的前沿及人類所關(guān)注的熱點,因此,本節(jié)課對學生而言既有趣味性,又有挑戰(zhàn)性。 (二)教學目標(1)知識與技能目標:1.通過全球氣候的長期演變圖,學生了解全球氣候處在波動變化之中。2.通過資料認識全球氣候一直處于變化之中并呈現(xiàn)一定變化周期,了解全球氣候變化對地理環(huán)境及人類活動的影響,能夠提出一些氣候變化的適應對策。