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人教版高中英语必修4A taste of English Humor说课稿3篇
Then I would ask them to think of a funny English or Chinese and tell it to partners. While telling stories, they can use expressions and some acting to help make the story funny. 5 minutes would be given to do this.Those stories they told there will be the material for their writing. Soletting them tell it at first is helpful. And they can make a difference between telling a funny story and writing it down. Generally speaking, it is difficult forstudents to write well because they don’t know what to write and how to write. Asking them to tell their own stories at first can help them come up with what to write.After their telling, I would invite someone to share his/her story with all of us and I would write it down on the blackboard.This example story would be used as a sample to illustrate the format of funny story. Different from a story from teacher or textbook, a story from students can obviously become a interesting material to draw students’ attention.Then I would ask the whole class to put this story into several parts. It might be a little bit difficult for them. So I would ask them to find out whether all the sentences are necessary. After delete some sentences, there are 6 sentences left behind. Then they can easily put them into three parts. After interaction with students, I would teach them the right terms for each part and conclude the format of funny story.This step is the key and difficult point in my lesson. So I mainly usetask-based teaching method in this part and the task for students was divided into several stages. With the separated difficult level, students can find there are usually three parts in writing. They can also learn to write without the unnecessary parts in the process of analyzing. And then I wouldn’t rush to tell them the right terms to them directly. Instead, I would ask them to name them by their own. A confused mind is better for acquiring knowledge.While-writing:Then I would give students 7 minutes to write down this story, without other requirements.With all the preparations in pre-writing, students’ difficulties were cleared. So it would be much easier for them to write down the story within 7 minutes. There are no other requirements because students’ first writing is actually a drafting. It would be revise and edit several times later. Writing, as a skill
人教版高中英语必修3Canada-the true north说课稿4篇
Good afternoon, teachers, It’s my great pleasure to be here sharing my lesson with you.The content of my lesson is Senior English Book 3 Unit 5 Canada —— “The true North”.I’ll be ready to begin this lesson from five parts. Analysis of the teaching material,the teaching methods,the studying methods, the teaching procedure,and Blackboard design.First, let me talk about the teaching material.Part 1 Teaching Material:This unit is about the introduction of Canada. By studying of this unit,we’ll enable the students to learn the geography, population, main cities, and natural beauty, natural resources of Canada. Through the training of the unit, it also requires students to learn some Language skills such as the expressions of position and emotions.So it plays an important part in the English teaching in this book.After studying the teaching material and analyzing the rule of children’s growing of mind,I think the teaching aims are the followings:1.Knowledge objects:(1) make the students learn some new words and phrases(2) make the students understand the content of the lesson.2.Ability objects:(1)To develop the Ss’ abilities of listening, speaking, reading and writing. Especially reading and speaking ability.(2) learn to talk about the characters of Canada in English(3)To train the Ss’ ability of working in pairs.3.Emotion objects:(1)Enable students to understand the characters of Canada..(2)Stimulate Ss to work hard to make China stronger.Part 2 Teaching Methods:I think helping students learn to master new words and phrases and improve the students’ reading and speaking ability is import and the difficult.According to the analysis of the teaching material and the import points and the difficult points,I will use the following teaching methods : question-guiding approach; fast-reading and careful reading; multi-media teaching methods; discussion
人教版高中英语必修4Women of achievement说课稿4篇
Good morning, distinguished judges:It’s my honor to talk about my teaching ideas with you. Today my topic is Women of Achievement. My presentation consists of six parts: the analysis of teaching material and student, teaching aims, key and difficult points, teaching and studying method, teaching procedures and blackboard design.First, let’s focus on the analysis of teaching material. This lesson is from New Senior English for China Student’s Book 4 Unit 1, the reading part. The main topic of the passage is the introduction of a student of Africanwildlife. After this lesson, the students will learn more information about her studying chimps in Africa, and their reading and speaking abilities can be developed as well.The next part is the analysis of students. My students are in senior high students. They have learnt English for many years, they’ve known many words and sentences, but their speaking and reading abilities are still not very good. So I will practice their speaking and reading abilities through different exercises.According to the New Standard Curriculum and the present situation, I set the teaching aims as follows: firstly, knowledge aims. Students can grasp some new words, such as worthwhile, move off. Moreover, students can understand the content of the passage and get familiar with the topic of studying chimps in wildlife. Secondly, ability aims. Students can use reading strategies such as skimming and scanning in reading process. Thirdly, emotional aims. Students can have the awareness of protecting animals and care about animals.Based on the above analysis, the key point of this lesson is to get the main idea and the detailed information from the passage; the difficult point is to talk about the wildlife protection and use reading strategies.
人教版高中英语必修3Festivals around the World说课稿3篇
Teaching plan for Unit 1 book3Good morning, teachers. It’s my great pleasure to be here because I can share my lesson with you and I can learn a lot from it. I’ll begin my lesson from the following four parts， the teaching material, the teaching methods, the studying methods and the teaching procedure.Firstly, let me talk about the teaching material. The content of my lesson is the reading passage festivals and celebrations of Unit 1 Festivals around the world. This passage is about festivals and celebrations. By studying this passage, we’ll enable the students to know that festivals exit everywhere, and many of festivals in different countries celebrate similar ideas. As we all know, the reading passage is the center of each unit. If the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.After studying the teaching material, I think the teaching aims are as the followings:1. Knowledge aims:(1) The Ss can master the usage of the important words andexpressions.(2)The Ss can use the __________________ (grammar) in the proper situation.Make students know about the festivals all over the world and the detail of the festivals, such as origin, content, and the date of the holiday festivals.2. Ability aims:(1) Students can talk about festivals and celebrations in English(2) To improve the student’s reading ability, especially their skimming and scanning ability.3. Emotion aims:Make the Ss know about the foreign festivals, and respect other countries’ custom.Next, let’s come to the important points and the difficult points.The important point is how to make the Ss understand the text better and the difficult point is how can they talk about it. secondly， Teaching Methods:1. task-based Language Teaching2. Computer assisted language teaching.3. question-and–answer methodThirdly， Studying Methods:
人教版高中英语必修4Theme parks说课稿3篇
The oldest and the most popular park in the worldenjoy the exciting activities thereget close to the life-size cartoon characters like Mickey Mouse and Donald Duck Step 3 Pre-reading1.What do you suppose a theme park is ?2.What do you think you can see in a theme park?(1.It is a kind of amusement park which has a certain theme – that the whole park is based on. 2.buildings, castles, statues, rare animals and birds, and so on.) Step 4 Reading ----- Theme Parks –---- Fun and More Than Fun1.Predict : Read the title and the pictures on P. 34 and PredictWhat is the meaning of the title “Theme Park – Fun and more than fun”?(The title means that theme parks are fun to visit, but that they can also be educational and can offer useful information.)2.Skimming Fast read and answer:What activities can we take in a theme park?Amusement park: Bumper car Merry-go-round slide bungee jumping Free-fall rides Horror films Pirate ship Ferris wheel roller coaster3.Scanning Read again and you will find various theme parks are mentioned in the passage . Then what are they ?Theme parks: Sports theme park History theme park Culture theme park Marine or Ocean theme Park Future park Science theme park Disneyland4.Careful reading and find the main idea of each paragraph:THEME PARKS---- entertaining/ educationalPara.1 Traditional parks are places to go for relaxation and to have time away from our busy lives.Para.2 Theme parks are different They’re large and full of things to do, see and buy.Para.3 Theme parks are built around a single idea or theme. One example is a sports park.Para.4 Another kind of theme park is historical more and cultural and can be educational.Para.5 Disneylandwas the first theme park. It is based on the fantasy life and characters of Disney’s films.Para.6 Some examples of educational theme parks include sea world parks and science parks.
人教版高中英语必修3Healthy Eating说课稿4篇
Language learning needs a context, which can help the learners to understand the language and then can product comprehensible output, so computer has the advantages to make the materials attractive.Part 3 Learning MethodsTask-based, self-dependent and cooperative learningPart 4 Teaching ProcedureStep One Lead-in“Interest is the best teacher.” Therefore, at the very beginning of the class, I should spark the students’ mind to focus on the centre topic “the band”. I’ll show some pictures of food to attract their attention and then bring some questions.Question:What kind of food they like?What should go into a good meal?The answers must relate to the diet. After this, the students will be eager to know something about a balance diet and this is the very time to naturally lead the class into Step 2Step 2 Reading for information: skimming and scanning In this step, I use Task-based Language Teaching method, which can give students a clear and specific purpose while skimming and scanning the context.Task 1 General ideaThe students will be asked to just glance at the title and the pictures of the passage, and then guess what they will read in the text. And they’ll be divided into groups of four to have a discussion.The purpose is to inspire the students to read actively, not passively. In addition, the task is to develop the students’ reading skill by making prediction and to encourage the students to express their thoughts in English and cooperate with each other.Task 2 Main idea of each paragraphCooperative learning can raise the students’ interest and create an atmosphere of achievement. Based on this theory, I divide the whole class into 4 groups to skim the whole text and get the main idea of each paragraph.
人教版高中英语必修4Working The Land说课稿3篇
Knowledge objectives:(1) to make Ss grasp the usage of words, expressions and sentence structures: statistics, struggle, thanks to, rid of, some patterns for persuasion, the “ing” form as subject and object;(2)to use learnt knowledge to persuade sb.Ability objectives:(1) to develop Ss’ reading skills(skimming, scanning, word guessing);(2) to improve Ss’ speaking, communicating and cooperating skills.Emotional objectives:to make Ss know the contribution of Yuan,and learn his spirit and his simple life time.Teaching important and difficult points:(1) some words, expressions and sentence structures mentioned above;(2)the content of the text;(3)training their reading and speaking skills.Teaching methods: CLT, TBLT,QT.Learning strategies: CLS, QLS, TBLS.Teaching procedures:Step 1 lead-in: (1) teacher plays a piece of recent news from CCTV about the harvest of the super hybrid rice, and ask students whether they know Yuan or not, and talk about him and his contribution.(2)Brain storm: let Ss describe Yuan in their minds including his appearance, his living condition and so on.Step 2 fast reading tasks:(1)teacher introduces Yuan and super hybrid rice(2)make Ss read the text as fast as possible with questions. Such as: what’s the general ideaof this passage? What’s Yuan’ dream? (skimming and scanning skill)Step 3 intensive reading tasks(1)let Ss read the text silently, find topic sentence of each paragraph and draw the difficult sentences and the knowledge what they don’t understand.(words guessing)(2)teacher and Ss talk about the important words, expressions and sentences together, and ask Ss to retell the content of the text.(summarizing and paraphrasing)(3)teacher summarize this part.(4) read again following the courseware.
人教版高中英语必修3The million pound bank note说课稿3篇
在接下来的细读环节，我套用了高考对阅读理解的考查方式设置了5个问题，分别为三个推理判断题，一个细节题和一个主旨大意题。学生需要对文章的内容进行分析、归纳、推理、猜测等高级思维活动才能做出正确的回答。【设计意图】这一过程是对学生进行细读的训练，培养学生获取特定信息和挖掘文章深层次信息的能力。第三环节:Intensive-reading (精读) 15′第三个环节精读，既是最重要的环节，也是突破本课重难点的关键。首先，让学生思考剧本中人物看到百万英镑前后的态度发生了怎样的变化。其次，让学生仔细阅读文章，找出可以表现人物态度变化的具体的语言和动作。最后，让学生总结人物的态度发生变化的根本原因是什么，从而引出Money Talks, 供学生思考。【设计意图】通过一系列的活动培养学生学习从人物的语言和动作探究人物的心理，使学生进一步体会戏剧语言的魅力，从而对文章背后所反映的社会问题进行思考，也为下一步的讨论环节做好铺垫。
人教版高中英语必修5First aid说课稿6篇
In this class, I have 3 teaching aims, that is, knowledge aims, ability aims and emotion aims.1) Knowledge-Teach students new words and expressions, such as temporary, bleed,sprain choke, first aid, fall ill and so on.-Enable students to have a better understanding for some basic knowledge of first aid.2) Ability-Train students’ speaking, reading and writing abilities by different teaching activities, such as skimming, comprehending, team work, role play, retelling and writing.-Develop students’ reading strategy on how to move general idea to specific information.3) Emotion-Promote students’ awareness of giving first aid.- Cultivate students’ creativities.Then let’s come to my teaching methods and activities.III. Teaching methods and activities:To achieve different teaching aims, various kinds of teaching methods and activities will be adopted throughout this period, such as TBL (task-based learning), skimming, team work, brainstorm and others, which can offer students opportunities to fulfill tasks in which they can use language to achieve a specific outcome.IV. Teaching aids:Computer and blackboardV. Teaching important points:1) Make students have a clear mind for the structure of the text.2) Help students understand the theme of the text.VI. Teaching difficulties:1) So many new words may affect students’ understanding.2) How to get students to know about the functions of the skin and thecauses, characteristics and treatments for different degree burns,and the knowledge about giving first aid. VII. Blackboard design:
人教版高中英语必修5Great scientists说课稿4篇
通过写文章梗概，培养学生综合运用语言的能力，学习用恰当的英语描述科学家的故事。这是本课的教学难点。教师可以使用完形填空的方式来帮助学生整理语篇，从而来降低难度。本课的教学重点的突破方法是：在阅读前，让学生初步了解得出科学观点所需要的基本程序，从而轻松而自然地导入文章的阅读；在阅读过程中，由易到难设计快速阅读和精读的问题，层层推进各种阅读活动，让学生对阅读内容从整体感知到细节理解，最后深层读懂整篇文章，同时加强阅读策略的指导，让每个学生都主动参与课堂教学活动，最终达到提高阅读能力的目的。Step 4 Post-readingGroup Activities四人小组共同合作，在老师的适当指导下，就以下2个问题展开讨论，让学生就所知、所学、所感和所想融入话题，然后抽若干同学代表作小组发言。1. What do you think about John Snow, and what should we learn from him?2. Cholera was 19th century disease, which two diseases are similar to cholera today? Why?
人教版高中英语必修5Life in the Future说课稿5篇
Good afternoon, everyone. It’s my great pleasure to be here sharing my lesson with you. The content of my lesson is Senior English for China Book5 Unit 3 Life in the Future. I’ll be ready to begin this lesson from six parts: Analysis of the teaching material, Analysis of the students, Teaching aims and important and difficult points, Teaching methods and aids, Teaching procedures, and Blackboard design. First, let me talk about the teaching material.Part 1 Analysis of the Teaching Material:This unit is about what human beings’ life will be like in about one thousand years. By studying of this unit, we’ll Enable the students to know the changes in humans’ life and some new inventions bringing about the change and develop the interest in science. This lesson plays an important part in the English teaching in this unit. This is an important lesson in Book Five. From this lesson, it starts asking the Ss to grasp contents of each passage. Therefore, this lesson is in the important position of the teaching material. If the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.Part 2 Analysis of the SsAs Senior2 Ss, they are at different levels of English fluency, some of them have lost interest in English. So during the lesson, I arrange a variety of activities to let all of them join in to attract their interest and let them be confident and taste the joy of success.
人教版高中英语必修5The United Kingdom说课稿4篇
Teaching Aims:Knowledge 1. Get the students to learn the useful new words and expressions in this section. Aims:2. Let the students learn about how the UK was formed and the four groups of invaders.1. Develop students’ reading ability and let them learn different Ability reading skills. Aims:2. Enable students to learn to talk about the United Kingdom and the Union Jack Emotional 1. Let students know more about the UK2. Develop students’ sense of cooperative learning Aims:Teaching Important Points:1. Let the students learn about the countries of the United Kingdom and the Union Jack2. Get the students to read the passage and know about how the UK was formed and the four groups of invaders.3. Have the students learn different reading skills.Teaching Difficult Ponts:1. Develop students’ reading ability.2. Enable students to talk about the United Kingdom and the Union Jack.3. Let students learn how the UK was formed geographically and historically.Teaching Methods:Showing pictures, asking, exercising, listening, reading etc.Teaching Aids:A computer,a projector and a blackboard.Teaching Procedures: 1) Show a map of the world, ask students the following questions:Where is the UK?What’s the full name of the UK?2) Ask the students work in pairs to do the quiz on Page 9.Do you want to test how many things you know about the United Kingdom? Let’s have a small test.Using the map on P9, students answer the following questions:?How many countries does the UK consist of? What are they??England is divided into three main areas. Do you know what they are? 1) Scanning (10Minutes )Let the students hold the questions asked in pre-reading and read the passagequickly and then let them do the following exercise.Join lines to the right answer.
人教版高中语文必修5《说“木叶”》教案
【教学目标】Ⅰ、学习理解诗歌语言的暗示性特质。Ⅱ、根据诗歌语言的特质，进行迁移，领略诗歌的精妙之处，给同学如何鉴赏诗歌提供实感。㈠、导入：各位同学，有个成语叫"一字千金"。对我而言，第一次领略到一个字的分量，是在小学三年级的时候，一次作文评析课上。当时我对自己的文章充满了期待，希望能得到老师的赞赏。记得老师进来后的第一句话是"有一篇文章，我就冲它用了一个字，我给它打95分。打这样的高分，对我来说，是极为难得的。"同学都充满了好奇，老师接着说"这个字就是一个'悟'字。我们的同学都说我学到了，我明白了，我懂得了一个道理，而这位同学却用了一个'悟'字，难能可贵。"这篇文章不是我的，在羡慕的同时，一个字在文章中的分量就深深的刻在了我的心上。文学作品中，一个字精妙与否，足以决定作品是流光溢彩，还是黯然失色。尤其是我们的古典诗词，用简短的几个字，造就的却是丰富的情感与博大的意境。读后满口余香，却是妙处难与君说。这跟诗歌的语言是密不可分的。今天，我们就通过《说"木叶"》一文，对中国古典诗词语言特质作一番探幽。
人教版高中语文必修2《就任北京大学校长之演说》说课稿3篇
（三）教学重、难点1、教学重点：结合课文，了解演讲辞针对性强、条理清楚、通俗易懂、适当的感情色彩等特点。2、教学难点：深入理解文章内涵，联系现实，体会本文的现实意义二、说学情高中学生在初中阶段已经接触过演讲辞了，对演讲词的特点已经有了一些基本的知识，因此本轮的教学应该让他们在此基础上有所提高。本文是学生在高中阶段第一次接触演讲辞，有必要让他们了解演讲辞的特点及课文如何体现这些特点的。随着年龄的增长，生活阅历的增加，高中学生正逐渐形成自己对世界、对人生的看法，蔡元培先生的这篇文章能很好地激发他们对当前的高中学习和未来的大学生活进行思考。此外，学生对北大的历史及蔡元培先生作这番演讲的时代背景了解不深，应作出补充说明。
人教版高中地理必修1第四章第一节营造地表形态的力量说课稿
（一）教材的地位与作用教材的第一部分就从地质作用的能量来源的角度，讲述了内力作用和外力作用及其表现形式；又以地质作用不同的表现形式，来说明了激烈迅速的地质作用和极其缓慢的地质作用，从而使学生理解地表形态的变化及这种变化的时间尺度。第二部分，从三大类岩石的相互转变入手，图文结合，阐明了在内外力作用的参与下地壳物质循环的过程及其地理意义，该部分内容可以看作是全课教材的小结。（二）教学目标(1)知识与技能目标：1、结合实例，说明内力作用的能量来源及其表现形式，理解地壳运动是塑造地表形态的主要作用方式。2、说明外力作用的四种形式及其相互关系，尝试识别外力作用形成的不同地貌。3、会用图文资料说明地壳物质循环的过程及其产生循环的物质基础——三大类岩石的转化过程。4、培养学生运用地理图表分析归纳的能力,培养学生与其它同学交流、表达的能力。
人教版高中历史必修1秦朝中央集权制度的形成说课稿2篇
问题设计：通过这一课的学习，同学们能解释君主专制中央集权制度的含义吗？【总结】封建专制主义中央集权制度包括专制主义和中央集权制两个概念。专制主义是就中央的决策方式而言的，主要体现在皇位终身制和世袭制上，特征是皇帝个人独裁专断，集国家最高权力于一身，从决策到行使军政财权都具有独断性和随意性；中央集权则是相对于地方分权而言，其特点是地方政府在政治、经济、军事等方面没有独立性，必须充分执行中央的政令，一切服从于中央。三、秦朝中央集权制的影响展示图片：《秦朝疆域图》正是由于有一个统一集中的中央政权，秦王朝才能积极开拓疆域，北拒匈奴，南吞百越，有利于我国多民族国家统一发展。为了巩固统一的国家，秦朝还通过实行哪些措施巩固统一局面？展示图片：“秦半两钱”“秦权”“小篆”“秦简”等图片。正是有一个强有力中央政府，才统一了货币、文字、度量衡，才开驿道、修灵渠，从而促进了中国经济文化的发展进步。展示“孟姜女哭长城”的故事材料从故事及你所掌握的材料中，你认为秦朝能否长治久安？为什么？
人教版新课标高中物理必修2万有引力定律说课稿2篇
学生中存在这样的问题：既然宇宙间的一切物体都是相互吸引的，那么为什么没有吸引到一起？为了解决这个问题，安排了例题2例2、两物体质量都是1kg，相距1m，它们间的万有引力是多少？通过本题，让学生认识到一般物体间的引力极小，不用考虑。那么，质量很大的天体为什么没被吸引到一块？从而引出下节课题。4.课堂小结：本节课，从天体运动出发，通过推理证明，形成理性认识，再结合例题习题使学生的理性认识再反馈到具体事实。形成实践-理论-实践的认知循环，顺应了认知规律.。本共设计了很多问，能让学生想的尽量让学生想、能学生说的尽量让学生说、能让学生做的尽量让学生做，全面发展学生的各方面能力。再通过作业和探究性课题使学生的思维活动在时空上得以延续。5.布置作业：布置作业时刻意安排引入：万有引力、重力、向心力、三者的联系，通过引导学生对比结果，从中发现问题：万有引力与重力向心力的关系与区别，为下节知识的难点突破作好了铺垫。
人教版新课标高中物理必修2万有引力理论的成就说课稿2篇
2、计算天体的质量首先观看多媒体展示天体的运动，同时解释什么是环绕天体？什么是中心天体？接着展示相关问题：①应用万有引力定律求解天体质量的基本思路是什么?②求解天体质量的方程依据是什么?教师点拨，学生分组，合作探究，学生代表发言设计说明通过创设问题情境，进行由浅至深，由易到难的问题式教学，以激发学生的积极思维活动；通过探究让学生建立物理模型，分组讨论，求解中心天体质量的三种表达式。在进行已有知识的迁移时重点重复环绕和被绕的关系，使学生准确抓住模型中的各个星体所担任的角色。通过小组合作学习，运用类比归纳法得出正确结论，掌握求解中心天体质量的基本思路，以达到突出教学重点的目的。3、发现未知天体通过2个视频进行了解设计说明这部分通过视频主要激发学生相信科学，学习科学，让学生感知人类探索宇宙的梦想，激发学生探索科学奥秘的热情，培养热爱科学的情感，促使学生树立献身科学的人生价值观。
人教版新课标高中物理必修2重力势能说课稿2篇
（四）、弹性势能（据课时情况，可以让学生自学）生活中还有一些物体既没有运动也没有很大的高度却同样“储存”着能量，哪怕它只是孩童手里的玩具（图片：弹弓）。张紧的弓一撒手就会对箭支做功改变它的动能，松弛的弓有这样的本领吗？同样是弓前者具有能量而后者没有，那么什么情况下物体才具有这种能量呢？张紧的弓在恢复原状的过程会对外做功，但是拉断的弓还能有做功的本领吗？1．定义：物体由于发生弹性形变而具有的能量叫做弹性势能。2．弹性势能的大小与哪些因素有关呢？3、势能由相互作用的物体的相对位置决定的能量。重力势能：由地球和物体间相对位置决定。弹性势能：由发生形变的各部分的相对位置决定。(五).反馈练习1. 物体在运动过程中，克服重力做功50J， 则( )A．重力做功为50JB．物体的重力势能一定增加50JC．物体的重力势能一定减少50JD．重力做功为-50J
人教版新课标高中物理必修2验证机械能守恒定律说课稿
一、 教材分析与学情分析教材分析人民教育出版社普通高中课程标准实验教科书必修2第七章第九节。本节内容安排在学习机械能守恒定律之后的目的，是为了使学生在理论上对机械能守恒定律有所了解的基础上，通过实验测量及对实验数据的分析处理，对机械能守恒定律及条件有深刻的认识。学情分析知识层面：学生已经掌握了动能、重力势能等概念以及动能定理、机械能守恒定律等定理、定律；知道功是能量转换的量度以及机械能守恒的条件。能力层面：学生已具备一定的实验操作技能，会用打点计时器以及直尺等实验仪器。具备一定的数据处理能力。二、教学目标与重点、难点教学目标知识与技能：1、会用打点计时器打下的纸带计算物体运动的速度。2、掌握验证机械能守恒定律的实验原理。
