教師總結(jié):社會主義市場經(jīng)濟(jì)是使市場在國家宏觀調(diào)控下起基礎(chǔ)性配置作用的經(jīng)濟(jì),充分發(fā)揮市場基礎(chǔ)性調(diào)節(jié)作用,就必須主要靠經(jīng)濟(jì)手段、法律手段,而不是行政手段。(三)課堂總結(jié)、點評這節(jié)課我們重點學(xué)習(xí)了社會主義市場經(jīng)濟(jì)的有關(guān)知識,知道了社會主義市場經(jīng)濟(jì)的基本特征,以及國家宏觀調(diào)控的含義、目標(biāo)和主要手段。這對于我們在經(jīng)濟(jì)生活中正確地認(rèn)識我國市場經(jīng)濟(jì)的性質(zhì)和作用,理解國家宏觀調(diào)控的措施及意義,增強(qiáng)社會主義優(yōu)越感和民族自強(qiáng)意識,自覺投身現(xiàn)代化建設(shè)等將有重大指導(dǎo)作用?!镎n余作業(yè) 討論:聯(lián)系經(jīng)濟(jì)生活中國家宏觀調(diào)控的實例,討論應(yīng)如何認(rèn)識和理解國家各種宏觀調(diào)控手段的綜合運(yùn)用,對國民經(jīng)濟(jì)發(fā)展的意義。★教學(xué)體會 本節(jié)內(nèi)容與學(xué)生生活實際聯(lián)系密切,在學(xué)習(xí)中應(yīng)該多引入日常生產(chǎn)、生活中常見的一些宏觀調(diào)控實例,讓學(xué)生去深刻理解、把握宏觀調(diào)控手段及其作用。
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(jìn)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(fèi)和消費(fèi)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(jìn)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)。
教師總結(jié):近二十多年來,我國個人所得稅的征收發(fā)展迅速,這也反映了我國經(jīng)濟(jì)水平、人民生活收入有了較大提高。與增值稅的計稅方法不同,個人所得稅采用累進(jìn)稅率的計稅辦法,就是個人所得越高,稅率越高,納稅人個人收入越多,繳納個人所得稅越多。這一特點從教材83頁個人所得稅稅率表上可以看出。教師點撥:個人所得稅的計算辦法是分段計算的,個人收入800元以內(nèi)不計稅,多余800元以上部分,按不同稅率分段計稅。請同學(xué)們計算教材所列題目。學(xué)生活動:計算。應(yīng)稅所得額:4000元;不超過500元部分:25元;500――2000元部分:150元;2000――4000元部分:300元;累計所得稅:475元教師活動:同學(xué)們想一想,這樣計算個人所得稅有什么意義呢?學(xué)生活動:認(rèn)真思考,回答問題教師點撥:有利于增加財政收入,有利于調(diào)節(jié)個人收入分配,實現(xiàn)社會公平。(三)課堂總結(jié)、點評
(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(rèn)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(rèn)真閱讀,積極思考。3、公民要增強(qiáng)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(hù)國家稅收工作?學(xué)生活動:認(rèn)真閱讀,積極思考。教師總結(jié):公民是國家稅收的最終負(fù)稅人,應(yīng)自覺增強(qiáng)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(jìn)行批評、檢舉,維護(hù)國家利益和自身利益。
三、第三階段。課后感悟與收獲1、讓學(xué)生以“走向?qū)W習(xí)型社會”為題,將在收集與整理、展示與交流兩個環(huán)節(jié)中獲得的體驗和感悟,以心得體會的形式寫一篇小論文。2、辦一期專欄或黑板報,將優(yōu)秀小論文作集中展示與交流。(進(jìn)行理論總結(jié),將實踐與理論相結(jié)合,讓科學(xué)理論更好地指導(dǎo)實踐。充分挖掘?qū)W生潛力,增強(qiáng)學(xué)生的自信)[評析]新課程理念之一就是政治課不應(yīng)只局限于課堂上的教與學(xué)。把綜合探究課與研究性學(xué)習(xí)相結(jié)合,不失為一種有益的嘗試。傳統(tǒng)的學(xué)習(xí)方式把學(xué)習(xí)建立在客觀性、受動性、依賴性的基礎(chǔ)上,把學(xué)生看成一個沒有感情的接受容器,這種學(xué)習(xí)會窒息學(xué)生的思維和智力,成為學(xué)生發(fā)展的障礙。單元探究活動的開展就是要轉(zhuǎn)變學(xué)生的學(xué)習(xí)方式,關(guān)注學(xué)生的學(xué)習(xí)過程,使得探究過程成為學(xué)生發(fā)現(xiàn)問題、提出問題、分析問題、解決問題的過程,培養(yǎng)學(xué)生的創(chuàng)新精神和實踐能力。本教案的第一階段充分發(fā)揮了學(xué)生的主動性。
另一方面,文化素質(zhì)影響公民政治權(quán)利的行使。隨著民主和法制建設(shè)的發(fā)展,人們?yōu)榱藚⑴c政治生活,需要更高的文化素養(yǎng)。文化水平提高了,人們受到的教育、接受的信息就越多,活動的領(lǐng)域就越廣,民主法制和權(quán)利意識就越強(qiáng),這些都會影響人們的民主素質(zhì)和民主水平,使人們更好地進(jìn)行政治參與,行使民主權(quán)利。(2)文化與國際政治相互交融,成為當(dāng)代國際政治斗爭的重要內(nèi)容。隨著世界多極化的發(fā)展,奉行霸權(quán)主義的國家,借助文化滲透的方式,竭力推銷自己的價值觀念,企圖削弱和取代別國的民族文化,以推行強(qiáng)權(quán)政治。這使世界范圍內(nèi)反對文化霸權(quán)主義的斗爭,成為當(dāng)代國際政治斗爭的重要內(nèi)容。文化已經(jīng)成為進(jìn)行政治斗爭、國際斗爭的重要形式之一。對文化市場的爭奪不僅僅是爭奪票房價值、爭奪經(jīng)濟(jì)效益,更主要的是對受眾對象的爭奪,對受眾注意力這種特殊的稀缺資源的占有,以及在此基礎(chǔ)上對輿論的控制與引導(dǎo)。因此,失去文化市場就意味著失去政治優(yōu)勢,意味著政治影響力的邊緣化乃至萎縮或喪失。這一點,從目前世界正在進(jìn)行的空前規(guī)模的“文化戰(zhàn)爭”,可以看得非常清楚。
一、教材分析我們使用的是人教版第四冊《生活與哲學(xué)》教材,本框?qū)儆诘谒膯卧谑n第一框題。其內(nèi)容主要分兩目,第一目主要介紹價值的含義、人是社會一切財富的創(chuàng)造者、人的價值在于創(chuàng)造價值和對社會的責(zé)任和貢獻(xiàn),以及對一個人的評價主要看他的貢獻(xiàn)等內(nèi)容。第二目主要介紹價值觀的導(dǎo)向作用,內(nèi)容包括價值觀的含義、價值觀對人們認(rèn)識世界和改造世界的活動具有導(dǎo)向作用以及對人生道路的選擇具有導(dǎo)向作用。二、教學(xué)目標(biāo)知識目標(biāo):1、識記價值和價值觀的基本含義;價值觀的導(dǎo)向作用。2、理解人的價值是什么?如何評價人的價值。3、運(yùn)用所學(xué)知識及相關(guān)哲學(xué)原理,分析物的價值和人的價值的 不同,從中加深對人的價值的理解評論分析為什么對一個人的評價要看他的貢獻(xiàn),而不是索取了多少。
【教材分析】The topic of this unit is about teenage life, which belongs to the theme context of “humans and oneself”.As teenagers who shoulder the responsibility of “Chinese great dream”, they must fully know themselves, including their strengths, weaknesses and challenges etc. They are supposed to improve themselves continuously and readily study their subjects, and thus foster their strategies and confidence in lifelong studies.This period is entitled the freshmen challenges, which mainly concerns some big challenges for new students in Senior high school. In this period, a teacher should lead students to find out what their challenges are and guide them to figure out how to crack the challenges and better themselves. More importantly, a teacher should instruct students to absorb new language points and appreciate the language. Besides, a teacher must instruct students to acquire some skills concerning reading efficiently and inspire them to talk more about their new school life, especially their new problems and solutions both at school and in life.【教學(xué)目標(biāo)與核心素養(yǎng)】1. Enable students to acquire the basic usage of the new words and expressions concerning the freshmen challenges and learn to use them flexibly.2. Enable students to have a good understanding of the freshmen challenges in the new senior high school which is quite different from junior middle school.3. Develop students’ sense of cooperative learning and individual thinking capability. 4. Develop students’ different learning skills to solve different reading comprehensive problems.
①標(biāo)題——標(biāo)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(jìn)一步的展開和闡述。④結(jié)束語——通常是對全文內(nèi)容進(jìn)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.
【教材分析】This teaching period mainly deals with the grammar: the restrictive relative clauses.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 exercise of good quality.【教學(xué)目標(biāo)與核心素養(yǎng)】1. Get students to have a good understanding of the basic usages of the restrictive relative clauses.2. Enable students to use the restrictive relative clauses flexibly.3. Develop students’ speaking and cooperating abilities.4. Strengthen students’ great interest in grammar learning.【教學(xué)重難點】How to enable students to have a good understanding of the restrictive relative clauses, especially the uses of the relative words such as which, that, who, whom.【教學(xué)過程】Step1: 語法知識呈現(xiàn)定語從句(一)—關(guān)系代詞的用法在復(fù)合句中, 修飾名詞或代詞的從句叫定語從句。定語從句通常由關(guān)系代詞或關(guān)系副詞引導(dǎo),說明事物的具體信息,從句位于被修飾詞之后。被定語從句修飾的詞叫先行詞,引導(dǎo)定語從句的詞叫關(guān)系詞,關(guān)系詞指代先行詞,并在定語從句中充當(dāng)成分。關(guān)系詞有兩種:關(guān)系代詞who, whom ,whose, that, which, as和關(guān)系副詞when, where, why。
【教材分析】高考聽力材料的選用非常重視語言真實性和交際性的原則,語言材料一般來源于實際生活,對話的內(nèi)容大都取材于日常生活,即衣、食、住、行、工作、學(xué)習(xí)、天氣、生活環(huán)境等話題,可分為校園、公共場所、家庭等方面,如: shopping, finding the way, doing one’s homework, seeing a doctor, making a phone call, weather report, asking for different kinds of information等。新教材的特點就是利用生活中真實文本,只是降低難度,讓學(xué)生注重語言的應(yīng)用,將是我們高考把握方向的重要因素?!窘虒W(xué)目標(biāo)與核心素養(yǎng)】學(xué)習(xí)能力目標(biāo):在聽力當(dāng)中,學(xué)生應(yīng)該有效規(guī)劃學(xué)習(xí)方法,選擇恰當(dāng)?shù)牟呗耘c方法。這節(jié)課的訓(xùn)練目標(biāo)是讓學(xué)生有正確的預(yù)測和抓住問題的關(guān)鍵信息,從而用心去聽來找尋關(guān)鍵信息。根據(jù)生活中實際情況和高考常見語境,我們不難發(fā)現(xiàn)提前預(yù)測和抓住題干中的w很重要,即what, where, when, why等等。
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(biāo)與核心素養(yǎng)】1. 文化意識目標(biāo)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(rèn)同。文化意識的的培養(yǎng)有助于學(xué)生增加國家認(rèn)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(biāo)
Step 3: Read to sum upRead it again and sum up the problems of the three students, and then write down the advice that was given from others.Step 4: Work in pairs. List your learning problems in English and brainstorm some useful advice.Useful expressions ? I don't know how to…... Is a big difficulty for me. I cannot ...? You might try …. It's very important to…? I have no idea how/what .My biggest problem is .... ? I (also) have trouble with. My advice is …. This worked for me.? l cannot understand the teachers’ English in class.Step 5 Homework:為提高我校學(xué)生的英語口語水平,我們將舉辦英語演講比賽(English- speaking contest),請你根據(jù)下面的信息,以學(xué)生會(the Students‘ Union)的名義寫一份海報,歡迎全校同學(xué)參加,屆時特邀本校美籍教師史密斯先生頒獎。? 報名時間 9月30日以前(報名:signup)? 報名地點 學(xué)生會辦公室? 比賽時間 10月9日晚7:00~9:00? 比賽地點 學(xué)校大會議室? 獎勵 前8名
Step 2 New WordsUse ppt to show some words from the passage.Tell the students to remember the meanings.Step3 Skimming and Thinking1. Skim the text and decide which order Han Jing follows to talk about her first day. Time order or place order?Time order2. What is Han Jing worried about before she goes to senior high school?She is worried about whether she will make new friends and if no one talks to her, what she should do.Step 4 Fast Reading1. Match the main ideas with each paragraphParagraph 1:The worries about the new school day Paragraph 2Han Jing’s first maths classParagraph 3Han Jing’s first chemistry classParagraph 4Han Jing’s feelings about her first senior school dayStep 5 Careful Reading1. Fill in the chart with the words and phrases about Han Jing’s day. Answers: Senior high school, a little nervous; Her first maths class, classmates and teachers, friendly and helpful; Chemistry lab; new; great; annoying guy; Confident; a lot to explore2. Read the text again and discuss the questions.1) Why did Han Jing feel anxious before school?Because she was a new senior high student and she was not outgoing. What was more, she was worried about whether she can make friends.2) How was her first maths class?It was difficult but the teacher was kind and friendly. 3) What happened in the chemistry class? What would you do if this happened to you? A guy next to Han Jing tried to talk with her and she couldn’t concentrate on the experiment.
教學(xué)目標(biāo)知識目標(biāo):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(biāo):培養(yǎng)學(xué)生的寫作能力和團(tuán)隊協(xié)作能力。情感目標(biāo):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(zhǔn)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?
The price is the same as(the price was)before the war.價格與戰(zhàn)前相同。(4)定語從句中的“關(guān)系代詞+助動詞be”可以省略。The ticket(that/which was)booked by his sister has been sent to him.他妹妹訂的那張票已送到了他那里。Step 5 PracticeActivity 3(1) Guide students to complete the four activities in the Using Structures part of exercise book, in which activities 1 and 2 focus on ellipsis in dialogue answers, activity 3 focus on signs and headlines, two typical situations where ellipsis is used, and activity 4 focus on ellipsis in diary, an informal style.(2) Combine the examples in the above activities, ask students to summarize the omitted situations in groups, and make their own summary into a poster, and post it on the class wall after class to share with the class.(This step should give full play to the subjectivity of students, and teachers should encourage students to conclude different ellipsis phenomena according to their own understanding, they can conclude according to the different parts omitted in the sentence.)Step 6 Homework1. Understand and master the usages of ellipsis;2. Finish the other exercises in Using structures of Workbook.1、通過本節(jié)內(nèi)容學(xué)習(xí),學(xué)生是否理解和掌握省略的用法;2、通過本節(jié)內(nèi)容學(xué)習(xí),學(xué)生能否根據(jù)上下文語境或情景恢復(fù)句子中省略的成分,體會使用省略的效果;3、通過本節(jié)內(nèi)容學(xué)習(xí),學(xué)生能否獨(dú)立完成練習(xí)冊和導(dǎo)學(xué)案中的相關(guān)練習(xí)。
(2)Consolidate key vocabulary.Ask the students to complete the exercises of activity 6 by themselves. Then ask them to check the answers with their partners.(The first language:Damage of the 1906 San Francisco earthquake and fire.A second language: Yunnan - one of the most diverse provinces in China).Step 5 Language points1. The teacher asks the students to read the text carefully, find out the more words and long and difficult sentences in the text and draw lines, understand the use of vocabulary, and analyze the structure of long and difficult sentences.2. The teacher explains and summarizes the usage of core vocabulary and asks the students to take notes.3. The teacher analyzes and explains the long and difficult sentences that the students don't understand, so that the students can understand them better.Step 6 Homework1. Read the text again, in-depth understanding of the text;2. Master the use of core vocabulary and understand the long and difficult sentences.3. Complete relevant exercises in the guide plan.1、通過本節(jié)內(nèi)容學(xué)習(xí),學(xué)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(nèi)容學(xué)習(xí),學(xué)生能否結(jié)合文本特點了解文章的結(jié)構(gòu)和作者的寫作邏輯;3、通過本節(jié)內(nèi)容學(xué)習(xí),學(xué)生能否了解舊金山的城市風(fēng)貌、文化特色,以及加利福尼亞州的歷史,體會多元文化對美國的影響。
知識和技能 ⑴從圖片和簡易圖中,了解氣團(tuán)(冷氣團(tuán)、暖氣團(tuán))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(fēng)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(xué)生能閱讀和簡單分析天氣圖,解釋天氣變化現(xiàn)象;⑵用案例說明氣象災(zāi)害發(fā)生的原因和危害;⑶結(jié)合我國常見的天氣系統(tǒng)說明其對人們生產(chǎn)和生活的影響情感、態(tài)度與價值觀激發(fā)學(xué)生探究天氣的形成和變化的興趣和動機(jī),培養(yǎng)學(xué)生求真、求實的科學(xué)態(tài)度,提高地理審美情趣教學(xué)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(cè)的氣壓、溫度、濕度、風(fēng)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。)
科學(xué)家預(yù)測,就地區(qū)而言,位于低緯度的大部分國家,農(nóng)作物的產(chǎn)量將減少;而位于高緯度的國家,農(nóng)作物產(chǎn)量有可能增加。由于不少發(fā)展中國家位于低緯度地區(qū),因此,氣候變化的這種區(qū)域差異性,可能會使發(fā)展中國家所面臨的問題更為嚴(yán)峻。板書:3全球變暖將加劇水資源的不穩(wěn)定性與供需矛盾。介紹:全球變暖會影響整個水循環(huán)過程,可能使蒸發(fā)加大,改變區(qū)域降水量和降水分布格局,增加降水極端異常事件的發(fā)生,導(dǎo)致洪澇、干旱災(zāi)害的頻次和強(qiáng)度增加,以及地表徑流發(fā)生變化。隨著徑流減少,蒸發(fā)增強(qiáng),全球變暖將加劇水資源的不穩(wěn)定性與供需矛盾。轉(zhuǎn)折:既然全球變暖會引起很多不利影響,那么作為人類應(yīng)如何面對這一挑戰(zhàn)呢?這就是我們要討論的第三個問題。板書:三、氣候變化的適應(yīng)對策討論:請大家閱讀結(jié)合教材P53氣候變化的適應(yīng)對策部分討論人類應(yīng)如何面對全球變暖這一問題 呢?