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人教版高中地理必修2城市化精品教案
1．改善城市環(huán)境：治理河流、控制大氣污染物、大力加強綠化建設為改善城市環(huán)境，上海市全面展開對大氣、河流、噪聲等多方面的治理工作。如蘇州河的治理、降低城市污染物濃度、加強綠化建設，截止1990年，市區(qū)綠化覆蓋率達到20.3%。2．改善城市交通、改善居住條件擴寬主干道，修建環(huán)城公路，修筑了南浦大橋和揚浦大橋，新修城市高架公路和地鐵，改造住宅。3．控制城市規(guī)模建立衛(wèi)星城，開發(fā)新區(qū)，有效地控制城市中心區(qū)的規(guī)模。思考：什么時候許多國家采取措施保護和改善城市環(huán)境？你認為可以采取哪些措施來保護和改善城市環(huán)境？上海市保護和改善城市環(huán)境的措施：上海的衛(wèi)星城有哪些？上海新建了哪個新區(qū)？目前浦東新區(qū)在上海的地位如何？建立衛(wèi)星城和開發(fā)新區(qū)可以起到什么作用？上海市為改善交通條件，做了哪些工作？
人教版高中歷史必修2第一次工業(yè)革命教案2篇
一、教學目標知識與能力：了解或掌握英國工業(yè)革命的條件和重要發(fā)明及進程，掌握工業(yè)革命的影響。分析工業(yè)革命首先發(fā)生在英國的條件和工業(yè)革命的影響，領會生產(chǎn)力和生產(chǎn)關系，經(jīng)濟基礎和上層建筑之間的辯證關系；分析工業(yè)革命對世界市場發(fā)展的影響，提高材料解析能力；分析世界市場基本形成的影響，培養(yǎng)學生運用辯證唯物主義和歷史唯物主義分析歷史事件的能力。過程與方法：啟發(fā)式談話法，問題探究法：層層設疑，環(huán)環(huán)相扣，由淺入深地理解知識。聯(lián)系比較法：構建知識體系，突出事物特點。情感態(tài)度與價值觀：懂得科學技術是第一生產(chǎn)力，使學生尊重科學,熱愛科學；正確認識工業(yè)文明的成就與代價，幫助學生形成正確價值觀；聯(lián)系中國歷史深刻理解科技興國，深化改革的必要性。二、教學重點和難點重點：英國工業(yè)革命產(chǎn)生的原因、工業(yè)革命的主要成就和影響。難點：工業(yè)革命對資本主義世界市場發(fā)展的影響。課時安排：1課時教具準備： 多媒體課件以及相應教學資料。
人教版高中政治必修2民主選舉：投出理性的一票教案
教師活動：那種“選舉與我無關”，“選誰都可以”的想法，是公民意識不強、主人翁意識不強的表現(xiàn)。那么，怎樣才能行使好自己的選舉權呢？請同學們根據(jù)上面的學習，談談自己的想法。學生活動：思考討論教師點評：2、 如何行使好自己的選舉權（1）要不斷提高自己參與民主選舉的素養(yǎng)，端正參加選舉的態(tài)度，提高選舉能力，選出切實能代表人民利益的人。（2）要增強主人翁責任感和公民參與意識，積極參加選舉，認真行使自己的選舉權。（3）要不斷提高政治參與能力，在理性判斷基礎上，鄭重投出自己的一票。（三）課堂總結、點評本節(jié)內(nèi)容講述了我國的選舉方式以及如何珍惜自己的選舉權利的有關知識，懂得我國是人民民主專政的社會主義國家，人民當家作主，應該增強主人翁責任感，自覺珍惜并運用好選舉權，以促進我國的民主政治建設，維護人民的根本利益。
人教版高中政治必修2民主選舉：投出理性一票教案
1、第一，材料一和材料二的選舉方式有什么異同？（1）相同點：①都采用了演講和答辯等形式，都帶有競選的性質；②都采用無記名、直接選舉的方式進行投票選舉；③都屬于差額選舉。（2）不同點：①材料一是對村主任進行的正式選舉，結果是直接產(chǎn)生村主任，材料二是對鎮(zhèn)長候選人進行的選舉，結果只是確定鎮(zhèn)長候選人，鎮(zhèn)長人選還有待進行正式選舉；②材料一是全體村民都參加選舉，材料二是各戶派代表參加選舉；③材料二比材料一更強調競選的方式。第二，你還知道哪些選舉方式？除了直接選舉外，還有間接選舉、等額選舉、差額選舉等。第三，你能對這幾種選舉方式的意義和效果，作出自己的評估嗎？這是學習中要探究的問題，這里不一定能回答出來，等到學完本框內(nèi)容后，可以得出比較明確的答案。第四，材料三給了你什么啟示？這個問題不要求統(tǒng)一的答案，能講出一兩點即可。提示如下：（1）新中國成立后，選舉制度經(jīng)歷半個多世紀的發(fā)展，正在逐步走向完善；
新人教版高中英語必修3Unit 2 Morals and Virtues-Listening &Speaking＆Talking教學設計
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.
新人教版高中英語必修3Unit 2 Morals and Virtues-Reading and Thinking教學設計
The topic of this part is “Learn to make choices in life”.The Listening & Speaking & Talking part aims at the moral dilemmas, and this part is about making choices in life. The heroin is Lin Qiaozhi, a famous medical scientist, made a great contribution to our country’s medical care. Most importantly, her life experience can inspire our students whether in studying or the development of career. she had moral dilemmas and life choices, which are similar to the students who will step into society. Besides, Lin has quite good virtues like kindness, self-improvement, insistence, job-loving , generosity and responsibility, which is worth being learned.Concretely, this article is a biography about Lin Qiaozhi. The article tells her whole life according the timeline, among which the life choices is emphasized. For example, whether married or chased her dream, returned home or stayed abroad, family or public, her choices all reflected her faith, spirit, responsibility and devotion.1. Fast reading to get the detailed information about Lin Qiaozhi; careful reading to do the deductive information.2. Learn the reading skills--deductive judgement according the context.3. Study the structure features and language features. 4. Communicate about Lin’s life choices and reflect their own life choices.1. Learn the reading skills--deductive judgement according the context.2. Study the structure features and language features.3. Communicate about Lin’s life choices and reflect their own life choices.Step 1 Lead in---Small talkWhat are some important life choices?Importance choices: university study, jobs and marriage partners. Because they can determine our future.
新人教版高中英語必修3Unit 2 Morals and Virtues-Reading for Writing教學設計
1. 這個寓言是一個關于一位國王古寓言。 The fable is an old fable about a king.2.作者用這個故事讓讀者對于社區(qū)的問題負有個人責任的必要印象深刻。The author used the story to impress upon readers with the need to take personal responsibility for problems in the community.3. 這個故事十分成功的實現(xiàn)了它的目的。The story was quite successful in achieving its purpose.Step 7 WritingPlease write a review of the story according the outline above.The fable is an old fable about a king who thought his people are lazy, so he put a large stone in the middle of the road and hides and waited to see if anyone will try to move it.The author used this story to impress upon readers with the need to take personal responsibility for problems in the community. The story was quite successful in achieving its purpose, and I liked it because it had a clear moral.However, while the moral of the story is clear, the actions of the king seemed pointless to me, because none of the characters in the story learnt anything. For this reason, I think there are better stories that can be used to impress upon people with the need for personal responsibility.Step 8 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer give a short description of the story ?2. Does the description include the most important details of the story ?3. Does the writer give his or her opinion about the character or their actions ?4. Is the review well-organised ? 5. Does the writer use the -ing form as the adverbial correctly in the writing ?6. Are there any grammar, spelling, or punctuation errors ?Step 9 HomeworkPut up your revised draft in the classroom or read it to your class.
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(nèi)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(nèi)容學習，學生能否在理解文段內(nèi)容的基礎上，根據(jù)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(nèi)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 3 Diverse Cultures教學設計三
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)容學習，學生是否理解和掌握省略的用法；2、通過本節(jié)內(nèi)容學習，學生能否根據(jù)上下文語境或情景恢復句子中省略的成分，體會使用省略的效果；3、通過本節(jié)內(nèi)容學習，學生能否獨立完成練習冊和導學案中的相關練習。
新人教版高中英語必修3Unit 3 Diverse Cultures教學設計二
(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(nèi)容學習，學生能否結合文本特點了解文章的結構和作者的寫作邏輯；3、通過本節(jié)內(nèi)容學習，學生能否了解舊金山的城市風貌、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。
新人教版高中英語必修3Unit 3 Diverse Cultures教學設計四
該板塊的活動主題是“介紹一個有顯著文化特征的地方”( Describe a place with distinctive cultural identity)。該板塊通過介紹中國城繼續(xù)聚焦中國文化。本單元主題圖呈現(xiàn)的是舊金山中國城的典型景象, Reading and Thinking部分也提到中國城,為該板塊作鋪墊。介紹中國城的目的主要是體現(xiàn)中國文化與美國多元文化的關系,它是美國多元文化的重要組成部分。中國城也是海外華人的精神家園和傳播中國文化的重要窗口,外國人在中國城能近距離體驗中國文化。1. Read the text to understand the cultural characteristics of Chinatown in San Francisco and the relationship between Chinese culture and American multiculturalism;2. Through reading, learn to comb the main information of the article, understand the author's writing purpose and writing characteristics;3. Learn to give a comprehensive, accurate, and organized description of the city or town you live in;Learn to revise and evaluate your writing.Importance:1. Guide the students to read the introduction of Chinatown in San Francisco and grasp its writing characteristics;2. Guide students to introduce their city or town in a comprehensive, accurate and organized way;3. Learn to comb the main information of the article, understand the author's writing purpose, and master the core vocabulary.
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(nèi)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(nèi)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(nèi)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(nèi)涵與意義。
人教版高中語文必修2《成語：中華文化的微縮景觀》教案2篇
七、教學反思這堂課有眼下看得見的效果和暫時看不見的長遠的效果，學生收益明顯：1．學生學到的不只是成語本身。學生從網(wǎng)絡上搜集材料，分析整理，不只是學成語，探究能力也得到提高。對成語的梳理探究，是讓學生做一件很具體的事——梳理、分析、歸類。重在過程，重在課外、課前學生的工作。這樣的教學設計很有價值，讓學生在活動中得到提高。2．開拓了學生的眼界。學生放眼各種報刊，從報刊中發(fā)現(xiàn)問題——大家都可能出錯。這樣一來學生的眼界變寬了，自信心增強了。3．對成語的理解、運用比過去深刻。讓學生從對一個個具體成語的理解入手，進而認識到以后用成語不能犯“望文生義”等錯誤，從個例上升到一般。4．讓學生知道以后自己運用成語應抱什么態(tài)度，用什么方法。別人錯用成語，是前車之鑒。
人教版高中語文必修2《姓氏源流與文化尋根》教案2篇
據(jù)此，研究者認為我國的姓源于原始社會母系氏族時期，并作為一個血緣家族的稱號。氏隸屬于姓。夏、商、周時期，姓氏作為貴族間區(qū)別不同血緣關系的一種制度。自秦漢以后，姓氏不分，合二而一。3、大家有沒有聽說過《水滸傳》中一個人物“西門慶”，他姓西門，為什么姓西門呢？他家住在西門這個地方。大家想想東郭先生為何姓東郭？可見有按居住地而得姓。4、現(xiàn)在如果賦予同學們一個神圣的職責，讓你們給一個人賜姓，這個人是殺豬殺雞殺鴨的，你們覺得要給他一個什么樣的姓才合適呢？（自由討論，姓“屠”）明確：這就是姓氏來源的又一種方法，按照職業(yè)取姓。大家想一想有沒有其他按照職業(yè)得姓的姓氏？（巫、卜、陶等）5、大家通過預習有沒有發(fā)現(xiàn)其他獲得姓氏的方法。（國名、自己祖先的字等。）姓在母系氏族社會以后，逐漸增多，來源極廣。主要來源于封國名、謚號、爵位名、官名、居地、職業(yè)等。
人教版高中語文必修2《親近自然寫景要抓住特征》教案2篇
一、教學目標1.指導學生以一顆真摯的童心、愛心面對大自然，促使學生的心靈與大自然親切交流。2.使學生明確寫景文章的寫作范圍、寫作重點、構思技巧。二、教學重難點明確話題，寫景抓住特征，注重感情。三、教學方法多重對話法四、教學過程1.導入語：自然是人類生活的環(huán)境，是人類賴以生存的基礎。人類不僅在物質上需要大地母親的哺育，而且在精神上也需要向自然尋求依托。當知時節(jié)的春雨飄落大地時，當秋風吹來誘人的果香時，感到喜悅、幸福的決不僅是農(nóng)民；過去的政治家、文學家，每當失意的時候，就會寄情山林；就是我們中學生，當不堪學習重負，感到身心疲憊的時候，去野外踏青，不也能愉悅身心嗎？可以說人對自然的情懷是與生俱來的。但不同的人，對自然的感悟有深淺不同，情趣有高下之分?！叭f類霜天競自由”的感悟，“大漠孤煙直”的審美不是人人都能有的。2.面對大自然，通過什么樣的手段來促使我們的感悟、審美向高深方向發(fā)展呢？哪位同學說說。
人教版高中語文必修2《就任北京大學校長之演說》教案2篇
（現(xiàn)狀：①對于教員，不能以誠相待，禮敬有加，只是利用耳。2段：因做官心切，對于教員，則不問其學問淺深，唯問其官階之大小。官階大者，特別歡迎，蓋唯將來畢業(yè)有人提攜。②對于同學校友，不能開誠布公，道義相勖。）他的第三點要求是，要求青年學子。這是從個人涵養(yǎng)方面來說的。尊敬師長，團結友愛，互相勉勵，共同提高，是建設良好校風必須具備的條件。端正學風，改善校風，就是為培養(yǎng)學術研究新風氣創(chuàng)造條件。全校上下樹立了新風尚，學校的學術氣也就會很快濃起來。這也是貫徹“思想自由”的辦學方針，不可或缺的措施。蔡元培先生在他這次演講中，始終是圍繞著他的辦學方針來闡述的。（四）蔡先生提出兩點計劃，目的為何？思考、討論、明確：一曰改良講義，以期學有所得，能裨實用。
人教版高中語文必修2《想象世界學習虛構》教案2篇
虛構不等于說假話。它是一種源于生活，但高于生活的藝術真實。我們可以舉個例子：我國公認的最權威最真實的史書是——《史記》，那么，大家認為《史記》里有沒有虛構呢？有。必修一的《鴻門宴》里就有虛構。大家想：司馬遷是哪個朝代的人？西漢漢武帝時。劉邦項羽是哪個朝代的？秦末時期。那司馬遷不可能坐時光穿梭機到秦末去參加鴻門宴吧？既然他沒不在場，那課文《鴻門宴》里人物的語言、動作、甚至是表情從何而來呢？對，是司馬遷根據(jù)有限的史料加以補充，想象、虛構出來的。那么，同學們在寫作文時，也可以不必拘泥于親身經(jīng)歷的事情，畢竟生活是平淡的，畢竟大家的生活閱歷也有限，有時候，我們發(fā)揮想象、虛構一個故事來反映生活的真實，也許更生動、也更典型。所以，近年來高考試卷中都提示考生：作文可以大膽想象，編寫故事。按照編故事的方式不同，我們的虛構性作文又可以寫哪些類型呢：小說，散文，童話，寓言，科幻，故事新編……
人教版高中語文必修2《直面挫折學習描寫》教案2篇
《貧寒是福天道酬勤石智勇從挫折中奮起》也許是自幼的貧寒生活塑造了石智勇內(nèi)向的性格，即使是胸掛金燦燦的獎牌接受全場觀眾歡呼，他的表情也是略顯羞澀的。小時候吃不飽肚皮的經(jīng)歷讓他至今在“最喜歡的東西”一欄還填寫著“食物”二字，而“窮人的孩子早當家”的堅韌，卻又是促成他今日輝煌的動力。中國舉重隊副總教練陳文斌賽后說道：“智勇這幾年練得很苦，今天終于有了這樣的成績，這是天道酬勤的結果。石智勇的奧運會金牌是中國男舉的一次突破，我們非常激動?！痹谙ＥD神話里，命運女神總是讓英雄歷經(jīng)磨難。石智勇也不例外。四年前的悉尼奧運會前夕，他在一次訓練中扭傷腳踝，失去了參賽機會?！爱敃r我傷心極了，不敢看電視直播，我怕參賽的選手成績太低了。高點我還好一點，自欺欺人一下說，哎呀好高，自己去了也拿不了冠軍，要是低了，自己沒去，失去冠軍機會，心里痛啊。后來結果出來，也不怎么高，心里真難受。”
人教版高中語文必修2《美的發(fā)現(xiàn)學習抒情》教案2篇
寫作指導：第一題要求寫出自然美，在自然美中融進自己的感情。小路、流水、山巒、森林、天空、大?！际菍嶓w事物，因此首先要求用寫生的辦法把它們表現(xiàn)出來，要寫得準確，寫出它們的特點和個性，尤其是寫出它們的美。同時，也要把贊美之情不落痕跡地融化在描寫之中。第二題是寫一幅風景畫或一張風景照片中的自然美景，以及美景中的一些細節(jié)，同時把自己心動的感覺寫出來。在這里，關鍵是找到畫或照片中的美，找到心動的感覺，如果找到了，再用文字把這美和感覺表達出來。當然，寫風景美和寫自己的感覺應是乳水交融的。第三題是用動情的筆墨把自己的一種經(jīng)歷寫出來。這些經(jīng)歷似乎都是細節(jié)，都不是驚天動地的大事。是細節(jié)，就容易碰到，在題目列舉的四種中，學生不難找到。即使不在這四種中，也可以，只要這種經(jīng)歷給了自己心靈以震撼或潛移默化的影響。
人教版新課標高中物理必修1物理學與人類文明教案2篇
八、物理學的基礎地位及物理學對人類文明、社會進步的影響。（1） 情景一：磁懸浮實驗：找兩個空心的圓柱片磁鐵，同名磁極相對，穿在同一根竹筷上，用手壓下上面的磁鐵，松手觀察它的運動情況。問題1：上面的磁鐵為什么會跳起來，為什么會懸浮在下面的磁鐵上方？問題2：根據(jù)這個實驗，你會想到那一種交通工具？總結：人們就是從磁懸浮現(xiàn)象中得到啟發(fā)，進行磁懸浮列車的研究和制造的，這說明物理學在推動社會進步、人類文明方面起到推動作用。（2） 情景二：感應起電和火花放電實驗：用感應起電機或感應圈產(chǎn)生火花放電，讓學生觀察現(xiàn)象，聞氣味，然后聯(lián)想生活實例。還可以用一張紙試著擋住放電的弧光，最好能引燃紙張，說明雷擊引起火災的現(xiàn)象。問題1：你看、聽到了什么現(xiàn)象？問題2：根據(jù)這個實驗，你會想到那一種自然現(xiàn)象？問題3：放電發(fā)生在什么地方？為什么建筑物上方都有尖尖的設置，是干什么用的？問題4：你聞到什么氣味了嗎？