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新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案二
This teaching period mainly deals with grammar “The Present Perfect Passive Voice.” To begin with, teachers should lead students to revise what they have learned about the Present Perfect Passive Voice. And then, teachers move on to stress more special cases concerning this grammar。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 exercises. 1. Guide students to review the basic usages of the Present Perfect Passive Voice2. Lead students to learn to use some special cases concerning the Present Perfect Passive Voice flexibly.2. Enable students to use the basic phrases structures flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of the Present Perfect Passive Voice in a sentence2. Instruct students to write essays using the proper the Present Perfect Passive Voice.觀察下列句子特點，總結(jié)共同點。1．(教材P28)Much has been written about the wonders of the World Wide Web．2．(教材P28)But the Internet has done much more for people than simply make life more convenient．3．(教材P28)Many people have been helped by the club．4．(教材P28)She no longer feels lonely, and her company has become quite successful．5．(教材P32)Today I thought I’d blog about a question that has been asked many times—how do you stay safe online and avoid bad experiences on the Internet?
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案二
From the pictures in the text and the title--- choose the best app, we can know that this part is about how to save money by using apps.Step 2 While-listening1. Laura and Xiao Bo are talking about apps. Listen to their conversation and find out what apps they want.Xiao Bo is looking for a(n) exercise app to help him get in shape.Laura would like an app for getting rich and another that will make her grades better.2. Listen again. Are the sentences true T or false F?1). Both of Xiao Bo's apps keep track of the steps he takes._____2). Xiao Bo's second app can help him make a fitness plan._____3). Laura needs an app that will help her get discounts.______4). Laura needs an app that will add money to her bank account._______F T F T3. Listen once more and tick the sentence you hear. Underline the words used to express predictions, guesses, and beliefs.Predictions, Guesses, and Beliefs________It might help me walk more.________My guess is that it wouldn't work.________I imagine this app would help me get fit faster________I suppose that would be good.________I guess you could save a little with this app.________I suppose there would be some problems, too.________I believe this app could help me get thinner.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案一
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
新人教版高中英語必修2Unit 3 The Internet-Reading for Writing教案二
8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。 Step 8 Writing---the articleHow to stay safe in the online chat roomToday I thought I’d blog about a question that has been asked many times--- how do you stay safe online and avoid bad experiences in the online chat room ? I’m not an expert, but many years as a blogger have taught me a thing or two.First of all, there’s the golden rule of the Internet: keep out of what makes you uneasy. Don’t post comments or click on anything. Second, protect your privacy. Don’t give out too much private information like your address, phone numbers, the ID numbers, etc. Third, be polite. If you are polite to others on the Internet, you won’t be attacked in normal situation. Finally, don’t believe in others easily and never meet someone you met online alone. It is very dangerous.Have you had any bad experiences online, or do you have some good advice for staying safe? Post your comments below!Step 9 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer tell the reader what he/she know about the topic ?2. Are the tips and suggestions well organised ?3. Has the writer defined the new words ?4. Does the author include examples, comparison, or explanations ?5. Does the writer end by asking readers to leave comments and/or suggestions ?6. Can you find any grammar or spelling mistakes.Step 6 HomeworkPut up your revised draft in the classroom or read it to your class.
新人教版高中英語必修2Unit 3 The Internet-Reading For Writing教案一
⑦identity theft 身份盜竊⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 張貼尷尬照片 【話題句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在網(wǎng)上保持安全, 避免在網(wǎng)上的不良經(jīng)歷? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是專家, 但作為一個博主, 我已經(jīng)學(xué)了好幾年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或讀到一些讓你覺得不舒服的東西, 立即離開這個網(wǎng)站。4. Don’t give out your address or phone number. 別告訴別人你的地址或電話號碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個常見而嚴重的問題。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上網(wǎng)并不是無禮的借口, 你也不想成為發(fā)挑釁帖子的人或網(wǎng)絡(luò)惡霸的目標。 7. Trolls often use several false names so that they can stay on a site. 發(fā)挑釁帖子的人經(jīng)常使用幾個假名, 這樣他們就可以留在一個網(wǎng)站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。
人教版高中地理必修3產(chǎn)業(yè)轉(zhuǎn)移教案
1．國家石油價格上漲，導(dǎo)致依賴于國際石油而建立起來的日本重化工業(yè)的制造成本提高，產(chǎn)品價格相應(yīng)提高，削弱了日本重化工產(chǎn)品在國際市場上的競爭力。2．日元 的大幅度升值，意味著日本產(chǎn)品在國際市場上的價格大幅度提高。例如，同樣的日本產(chǎn)品，如果原來在國際市場上賣1美元，日元升值1倍后其在國際市場上的售價就達2美元。所以，以國際市場為依托的日本傳統(tǒng)產(chǎn)業(yè)只好紛紛向海外轉(zhuǎn)移。3．自身市場滿足不了發(fā)展需求，國際市場上亞洲發(fā)展中國家和地區(qū)的同類產(chǎn)品具有明顯的價格優(yōu)勢。所以，日本企業(yè)在其國內(nèi)發(fā)展的空間很小。4．勞動力價格高反映為產(chǎn)品的價格高，而勞動力數(shù)量又滿足 不了企業(yè)進一步擴展對勞動力的需求。所以，日本從事傳統(tǒng)產(chǎn)業(yè)的國內(nèi)企業(yè)生產(chǎn)受勞動力價格和數(shù)量的雙重制約。5．促進日本企業(yè)生產(chǎn)的區(qū)位選擇向國土的南、北部和海外擴展。6．“技術(shù)立國”的政策明顯對傳統(tǒng)產(chǎn)業(yè)在國內(nèi)生產(chǎn)不利，即企業(yè)生產(chǎn)要么向知識技術(shù)密集型轉(zhuǎn)換（這需要大量的投資），要么轉(zhuǎn)向海外。
人教版高中歷史必修3從蒸汽機到互聯(lián)網(wǎng)教案
（2）根據(jù)材料二與所學(xué)知識，從經(jīng)濟、政治、思想文化三個方面，分析歐洲近代科技迅速發(fā)展的原因。答：資本主義工商業(yè)的成長刺激了對技術(shù)的需求，為近代科技的發(fā)展提供了工具和手段；資產(chǎn)階級革命為資本主義發(fā)展、科技進步開辟了道路；人文主義和理性精神解放了思想，推動近代科技迅速發(fā)展。（如答出其它原因，言之有理，可酌情加分，但不得超過該問總分）（3）根據(jù)材料二三與所學(xué)知識，分析清代（鴉片戰(zhàn)爭前）中國科技發(fā)展停滯的原因。答：君主專制維系腐朽制度；重農(nóng)抑商、閉關(guān)政策阻礙資本主義萌芽發(fā)展；自然經(jīng)濟不能提供近代科技發(fā)展的物質(zhì)基礎(chǔ)；文化專制政策（或崇尚理學(xué)、八股取士、文字獄等）禁錮思想，摧殘人才，阻礙科技發(fā)展。（如答出其它原因，言之有理，可酌情加分，但不得超過該問總分。）（4）簡述從中西方科技發(fā)展變化的歷史中得到的啟示。答：評分說明：圍繞生產(chǎn)力發(fā)展，政治經(jīng)濟變革、思想解放與科技發(fā)展的關(guān)系等任一角度回答，言之有理，均可酌情賦分
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案一
This unit is about the Internet, which has a great influence to our humans and our lives. During the Listening & Speaking & Talking and Reading and Thinking section, the influence in examples has been shown. Thus, use the Present Perfect Tense is appropriate. However, in order to show the justice or weaken the doer of the behavior/action, it’s better to use the Present Perfect Passive Voice than the Present Perfect Tense. Besides, having learned to use the Present Perfect Passive Voice, students can beautify their language in their writing. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. Step 1 Observe the following sentences, then change the sentences into passive voice.He has been selected to take part in the sports meeting．(肯定句)他已被挑選出來參加運動會。The ink has not been removed from his overcoat．(否定句)墨跡還沒有從他外套上去掉。
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案一
Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”； “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案二
Q5：What's Jan's next goal?Her next goal is to start a charity website to raise money for children in poor countries.Q6：What can we learn from her experiences?We learn that when we go through tough times, we can find help and support from other people online. We learn that we can feel less lonelyStep 5: While reading---rethinkingQ1: What is Jan’s attitude to the Internet ?Thankful/Grateful, because it has changed her and her life.Q2: What writing skills is used in the article ?Examples(Jan’s example, the 59-year-old man’s and the 61-year-old woman’s example)Q3: Can you get the main idea of the article ?The Internet has changed Jan’s life/Jan’s life has been changed by the Internet.Step 6 Post reading---Retell the storyMuch has been written about the wonders of the World Wide Web. There are countless articles (1)telling(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)more(much) for people than simply make life more convenient. People’s lives (3) have been changed(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)stuck(stick) at home with only her computer to keep (5)her(she) company. She joined an online group (6)where she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)benefits(benefit). She was so inspired (8)that she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)for children in poor countries. Jan’s life has been (10)greatly(great) improved by the Internet.
人教版新課標高中物理必修2探究彈性勢能的表達式教案2篇
“做功的過程就是能量轉(zhuǎn)化過程”，這是本章教學(xué)中的一條主線。對于一種勢能，就一定對應(yīng)于相應(yīng)的力做功。類比研究重力勢能是從分析重力做功入手的，研究彈簧的彈性勢能則應(yīng)從彈簧的彈力做功入手。然而彈簧的彈力是一個變力，如何研究變力做功是本節(jié)的一個難點，也是重點。首先，要引導(dǎo)學(xué)生通過類比重力做功和重力勢能的關(guān)系得出彈簧的彈力做功和彈簧的彈性勢能的關(guān)系。其次，通過合理的猜想與假設(shè)得出彈簧的彈力做功與哪些物理量有關(guān)。最后，類比勻變速直線運動求位移的方法，進行知識遷移，利用微元法的思想得到彈簧彈力做功的表達式，逐步把微分和積分的思想滲透到學(xué)生的思維中。本節(jié)課通過游戲引入課題，通過生活中拉弓射箭、撐桿跳高和彈跳蛙等玩具以及各種彈簧等實例來創(chuàng)設(shè)情景，提出問題。給學(xué)生感性認識，引起學(xué)生的好奇心；讓學(xué)生對彈簧彈力做功的影響因素進行猜想和假設(shè)，提出合理的推測，激發(fā)學(xué)生的探索心理，構(gòu)思實驗，為定性探究打下基礎(chǔ)。然后，引導(dǎo)學(xué)生通過類比重力做功與重力勢能的關(guān)系得出彈簧彈性勢能與彈簧彈力做功的關(guān)系。
人教版新課標高中地理必修2第三章第一節(jié)農(nóng)業(yè)區(qū)位的選擇教案
1.澳大利亞混合農(nóng)業(yè)地域在生產(chǎn)結(jié)構(gòu)、經(jīng)營方式、科技應(yīng)用、農(nóng)業(yè)專業(yè)化和地域化等方面有哪些特點？2.在澳大利亞混合農(nóng)業(yè)地 域形成的過程中，有哪些區(qū)位因素在起作用？學(xué)生發(fā)言，教師適當(dāng)引導(dǎo)、評點并作講解。[教師提問]：那么，澳大利亞的墨累—達令盆地的區(qū)位因素有什么不足之處？知識拓展：課件展示澳大利亞大分水嶺的雨影效應(yīng)的形成原理及東水西調(diào)示意圖。[教師講解]：澳大利亞東南部受大分水嶺的影響，降水集中于大分水嶺的東側(cè)，在其西側(cè)形成山地的雨影效應(yīng)，降水豐富地區(qū)與農(nóng)業(yè)生產(chǎn)地區(qū)分布不一致，灌溉成為澳大利亞農(nóng)牧業(yè)發(fā)展的限制性條件。因此，澳大利亞對水利工程建設(shè)很 重視，東水西調(diào)促進了墨累—達令盆地農(nóng)牧業(yè)的發(fā)展。[課堂小結(jié)]：這節(jié)課我們學(xué)習(xí)了農(nóng)業(yè)區(qū)位選擇的基本原理。 通過學(xué)習(xí)我們了解到，農(nóng)業(yè)的區(qū)位選擇實質(zhì)上就是對農(nóng)業(yè)土地的合理利用。
人教版新課標高中物理必修2功率教案2篇
1．用CAI課件模擬汽車的啟動過程。師生共同討論：①如果作用在物體上的力為恒力，且物體以勻速運動，則力對物體做功的功率保持不變。此情況下，任意一段時間內(nèi)的平均功率與任一瞬時的瞬時功率都是相同的。②很多動力機器通常有一個額定功率，且通常使其在額定功率狀態(tài)工作（如汽車），根據(jù)P=FV可知：當(dāng)路面阻力較小時，牽引力也小，速度大，即汽車可以跑得快些；當(dāng)路面阻力較大，或爬坡時，需要比較大的牽引力，速度必須小。這就是爬坡時汽車換低速擋的道理。③如果動力機器在實際功率小于額定功率的條件下工作，例如汽車剛剛起動后的一段時間內(nèi)，速度逐漸增大過程中，牽引力仍可增大，即F和v可以同時增大，但是這一情況應(yīng)以二者乘積等于額定功率為限度，即當(dāng)實際功率大于額定功率以后，這種情況不可能實現(xiàn)。
人教版新課標高中物理必修1彈力教案2篇
一般情況下，凡是支持物對物體的支持力，都是支持物因發(fā)生形變而對物體產(chǎn)生彈力。所以支持力的方向總是垂直于支持面而指向被支持的物體。例1：放在水平桌面上的書書由于重力的作用而壓迫桌面，使書和桌面同時發(fā)生微小形變，要恢復(fù)原狀，對桌面產(chǎn)生垂直于桌面向下的彈力f1，這就是書對桌面的壓力；桌面由于發(fā)生微小的形變，對書產(chǎn)生垂直于書面向上的彈力f2，這就是桌面對書的支持力。學(xué)生分析：靜止地放在傾斜木板上的書，書對木板的壓力和木板對書的支持力。并畫出力的示意圖。結(jié)論：壓力、支持力都是彈力。壓力的方向總是垂直于支持面而指向被壓的物體，支持力的方向總是垂直于支持面而指向被支持的物體。引導(dǎo)學(xué)生分析靜止時，懸繩對重物的拉力及方向。引導(dǎo)得出：懸掛物由于重力的作用而拉緊懸繩，使重物、懸繩同時發(fā)生微小的形變。重物由于發(fā)生微小的形變，對懸繩產(chǎn)生豎直向下的彈力f1，這是物對繩的拉力；懸繩由于發(fā)生微小形變，對物產(chǎn)生豎直向上的彈力f2，這就是繩對物體的拉力。
人教版新課標高中物理必修1摩擦力教案2篇
l．知識與技能：（1）知道摩擦力產(chǎn)生的條件。（2）能在簡單問題中，根據(jù)物體的運動狀態(tài)，判斷靜摩擦力的有無、大小和方向；知道存在著最大靜摩擦力。（3）掌握動磨擦因數(shù)，會在具體問題中計算滑動磨擦力，掌握判定摩擦力方向的方法。（4）知道影響到摩擦因數(shù)的因素。2．過程與方法：通過觀察演示實驗，概括出摩擦力產(chǎn)生的條件及摩擦力的特點，培養(yǎng)學(xué)生的觀察、概括能力。通過靜摩擦力與滑動摩擦力的區(qū)別對比，培養(yǎng)學(xué)生分析綜合能力。3．情感態(tài)度價值觀：在分析物體所受摩擦力時，突出主要矛盾，忽略次要因素及無關(guān)因素，總結(jié)出摩擦力產(chǎn)生的條件和規(guī)律。二、重點、難點分析1．本節(jié)課的內(nèi)容分滑動摩擦力和靜摩擦力兩部分。重點是摩擦力產(chǎn)生的條件、特性和規(guī)律，通過演示實驗得出關(guān)系f=μN。2．難點是學(xué)生有初中的知識，往往誤認為壓力N的大小總是跟滑動物體所受的重力相等，因此必須指出只有當(dāng)兩物體的接觸面垂直，物體在水平拉力作用下，沿水平面滑動時，壓力N的大小才跟物體所受的重力相等。
人教版新課標高中物理必修2平拋運動教案2篇
（五）平拋運動規(guī)律的應(yīng)用例1：一架老式飛機在高出海面45m的高處，以80m/s的速度水平飛行，為了使飛機上投下的炸彈落在停在海面上的敵船，應(yīng)該在與轟炸目標的水平距離為多遠的地方投彈?不計空氣阻力。分析：對于這道題我們可以從以下幾個方面來考慮：(1)從水平飛行的飛機上投下的炸彈，做什么運動?為什么?(2)炸彈的這種運動可分解為哪兩個什么樣的分運動?3)要想使炸彈投到指定的目標處，你認為炸彈落地前在水平方向通過的距離與投彈時飛機離目標的水平距離之間有什么關(guān)系?拓展：1、式飛機在高出海面45m的高處，以80m/s的速度水平飛行，尾追一艘以15m/s逃逸的敵船，為了使飛機上投下的炸彈正好擊中敵船，應(yīng)該在與轟炸目標的水平距離為多遠的地方投彈?不計空氣阻力。2、在一次摩托車跨越壕溝的表演中，摩托車從壕溝的一側(cè)以速度v＝40m/s沿水平方向向另一側(cè)，壕溝兩側(cè)的高度及寬度如圖所示，摩托車可看做質(zhì)點，不計空氣阻力。（1）判斷摩托車能否跨越壕溝？請計算說明（2）若能跨過，求落地速度？
人教版新課標高中物理必修2向心力教案2篇
3．進一步體會力是產(chǎn)生加速度的原因，并通過牛頓第二定律來理解勻速圓周運動、變速圓周運動及一般曲線運動的各自特點。（三）、情感、態(tài)度與價值觀1．在實驗中，培養(yǎng)學(xué)生動手、探究的習(xí)慣。2．體會實驗的意義，感受成功的快樂，激發(fā)學(xué)生探究問題的熱情、樂于學(xué)習(xí)的品質(zhì)。教學(xué)重點1．體會牛頓第二定律在向心力上的應(yīng)用。2．明確向心力的意義、作用、公式及其變形，并經(jīng)行計算。教學(xué)難點1．對向心力的理解及來源的尋找。2．運用向心力、向心加速度的知識解決圓周運動問題。教學(xué)過程（一）、 引入新課：復(fù)習(xí)提問：勻速圓周運動的物體的加速度——向心加速度，它的方向和大小有何特點呢？學(xué)生回答后進一步引導(dǎo)：那做勻速圓周運動物體的受力有什么特點呢？是什么力使物體做圓周運動而不沿直線飛出？請同學(xué)們先閱讀教材
人教版高中語文必修1《記梁任公先生的一次演講》教案
三、教師總結(jié)：在那如火如荼的苦難歲月，梁任公的政治主張屢屢因時而變，但為人處世的原則始終未變，他不是馮自由等人所描述的那種變色龍。他重感情，輕名利，嚴于律己，坦誠待人。無論是做兒子、做丈夫、做學(xué)生，還是做父親、做師長、做同事，他都能營造一個磁場，亮出一道風(fēng)景。明鏡似水，善解人意是他的常態(tài)，在某些關(guān)鍵時刻，則以大手筆寫實愛的海洋，讓海洋為寬容而定格，人間為之增色。我敢斷言，在風(fēng)云際會和星光燦爛的中國近代人才群體中，特別是在遐邇有知的重量級歷史人物中，能在做人的問題上與梁啟超比試者是不大容易找到的。四、課后作業(yè)：找出文中細節(jié)及側(cè)面描寫的地方，想一想這樣寫有什么好處，總結(jié)本文的寫作特點。五、板書設(shè)計：梁任公演講特點:
人教版高中語文必修4《語言生活的歷史進程》教案
交談時雙方的空間距離也有一定講究。和朋友談話、和陌生人談話、和異性談話、招呼長者和上級，都需要有一個合適的距離。如果上級故意“縮減”與下級人員通常談話時的距離，那是表示對下級的關(guān)切。說話的時候需要一面想，一面說，為了控制說話的主動權(quán)，免得被別人插人、打斷，人們可以使用“唔”“啊”之類的音節(jié)，表示“話還沒有說完，你別著急”之類的意思?？瞻滓脖硎疽馑迹谡f唱藝術(shù)中，什么時候停頓，停多久，都有講究，以便使交際更有成效。這就是說，空間和時間的因素也在交際中得到了適當(dāng)?shù)倪\用。所以，各種伴隨動作也是交際的工具。它們一般都是在語言的基礎(chǔ)上產(chǎn)生的。即使像“察顏觀色”這一類特定的交際方式，也必須有語言的交際為基礎(chǔ)，預(yù)先有了一定的了解，對方才能領(lǐng)會?？傊?，在上述的種種交際工具當(dāng)中，身勢等伴隨動作是非語言的交際工具；旗語之類是建立在語言、文字基礎(chǔ)之上的輔助性交際工具；文字是建立在語言基礎(chǔ)之上的一種最重要的輔助交際工具；
人教版新課標高中物理必修2能量守恒定律與能源教案2篇
世界能源問題的解決途徑是什么?能源，是人類敕以生存和進行生產(chǎn)的不可缺少的資源．近年來，隨著生產(chǎn)力的發(fā)展和能源消費的增長．能源問題已被列為世界上研究的重大問題之一．解決世界能源問題的根本途徑，主要有兩個方面：其一是廣泛開源，其二是認真節(jié)流．所謂開源，就是積極開發(fā)和利用各種能源．在繼續(xù)加緊石油勘探和尋找新的石油產(chǎn)地的同時，積極開發(fā)豐富的煤炭資源，還要大力開發(fā)水能，生物能等常規(guī)能源，加強核能、太陽能，風(fēng)能、沼氣，海洋能，地?zé)崮芤约捌渌鞣N新能源的研究和利用，從而不斷擴大人類的能源資源的種類和來源．所謂節(jié)流，就是要大力提倡節(jié)約能源．節(jié)能是世界上許多國家關(guān)心和研究的重要課題，甚至有人把節(jié)能稱為世界的“第五大能源”，與煤、石油和天然氣、水能、核能等并列．在節(jié)能方面，在有計劃地控制人口增長的同時，重點要發(fā)揮先進科學(xué)技術(shù)的優(yōu)勢，提高各國的能源利用效率．