-
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 4 History and Traditions-Discovering Useful Structure教案一
Step 5 Practice一、完成下列句子。1. Judy and I _______________（把車停下來(park)）in an underground car Park near Trafalgar Square, where we could ______________________(讓我們的車充電（charge)).2. When we finally reached the service desk to ask for audio guides, we heard it ___________ that there were no audio guides____________(留下，剩下）.3. We__________________________（發(fā)現(xiàn)自己對...很驚訝）the large number of visitors and the amount of noise at the entrance of the National Gallery.4. Judy ____________________(眼神專注于） Van Gogh’s Sunflowers. It was hard to approach the painting as there were so many people around.5. She ____________________(把這幅畫的復(fù)制品裝箱（box)） to ensure that it was delivered safely.答案：1.had our car parked get our car battery charged 2. announced left 3. found ourselves very surprised 4. had her eyes fixed on 5. had a copy of the painting boxed二、用過去分詞對下列句子進行改寫。1. Loch Ness was surrounded by beautiful natural landscape, which made it look amazing.2. Carl and his friend stayed with a generous family who offered them bread with butter and honey that was homemade.3. The family’s ancestors once attended to soldiers who were wounded in the First World War.4. The young people were attracted by the legend of Loch Ness. They watched over the lake with their cameras and binoculars, which were positioned on the hill.答案：1. Loch Ness surrounded by beautiful natural landscape looks amazing.2. Carl and his friends stayed with a generous family who offered them homemade bread with butter and honey.3. The family’s ancestors once attended to wounded soldiers in the First World War.4. The young people attracted by the legend of Loch Ness watched over the lake with their cameras and binoculars positioned on the hill.
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 4 History and Traditions-Listening＆Speaking＆Talking教案一
This unit is about history and traditions. From the opening page, we can know that this unit will introduce the history and traditions around the world. As Marcus Garvey says “A people without the knowledge of their past history, origin and culture is like a tree without roots”, it is important for students to realize the importance and value of knowing the history and traditions and their further meanings. And this part ( listening and speaking ) is divided into two parts: Part A---share views on historic sites, Part B ---talk about a visit to a historic tourist destination. By talking with a foreigner, the speakers introduce the historic attractions and their cultures. Part A is that William, a British student, who was going to visit the Confucius Temple and a Chinese student, Xiao Kong, who was going to the Confucius Temple to meet with the members of the research group, went together and exchanged their views on the Confucius Temple, Confucius, Confucius' descendants and Confucius' educational thoughts. Part B is a conversation between Xiao Yan, a youth hostel receptionist and Paul, a backpacker about the feelings and experience after visiting the Chinese famous tourist attraction Pingyao.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to talk about historic spots and great person.3. Instruct students to use functional sentences of showing one’s excitement, surprise and disappointment.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to discuss with their peers the related topics.3. Enable students to use the functional items of showing one’s excitement, surprise and disappointment.
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。
新人教版高中英語必修2Unit 4 History and Traditions-Reading and Thinking教案一
Features of languages1．Finally, in the 20th century, the southern part of Ireland broke away from the UK, which resulted in the full name we have today: the United Kingdom of Great Britain and Northern Ireland．該句是一個復(fù)合句。該句主句為：the southern part of Ireland broke away from the UK；which resulted in the full name we have today為which引導(dǎo)的定語從句代指前面整句話的內(nèi)容，we have today為定語從句修飾先行詞name。譯文：最后，在20世紀，愛爾蘭南部脫離英國，這導(dǎo)致了我們今天有的英國的全名：大不列顛及北愛爾蘭聯(lián)合王國。2．Almost everywhere you go in the UK, you will be surrounded by evidence of four different groups of people who took over at different times throughout history．該句是一個復(fù)合句。該句主句為：you will be surrounded by evidence of four different groups of people；其中Almost everywhere you go in the UK為讓步狀語從句； who took over at different times throughout history為定語從句修飾先行詞people。譯文：幾乎無論你走到英國的任何地方，你都會發(fā)現(xiàn)歷史上有四種不同的人在不同的時期統(tǒng)治過英國。3．The capital city London is a great place to start, as it is an ancient port city that has a history dating all the way back to Roman times．該句是一個復(fù)合句。該句主句為：The capital city London is a great place to start; as it is an ancient port city that has a history dating all the way back to Roman times．為原因狀語從句；dating all the way back to Roman times為現(xiàn)在分詞短語作定語修飾history。
新人教版高中英語必修2Unit 5 Music-Discovering Useful Structures教案一
Step1:自主探究。1．(教材P52)Born(bear) in the USA on 2 January 1970, Whitacre began studying music at the University of Nevada in 1988．2．(教材P52) Moved(move) by this music, he said, “It was like seeing color for the first time．”3．(教材P56)I was very afraid and I felt so alone and discouraged(discourage)．4．(教材P58)Encouraged(encourage) by this first performance and the positive reaction of the audience, I have continued to play the piano and enjoy it more every day．Step2:語法要點精析。用法1：過去分詞作表語1）．過去分詞可放在連系動詞be, get, feel, remain, seem, look, become等之后作表語，表示主語所處的狀態(tài)Tom was astonished to see a snake moving across the floor．湯姆很驚訝地看到一條蛇正爬過地板。Finally the baby felt tired of playing with those toys．終于嬰兒厭倦了玩那些玩具。注意：1）.過去分詞作表語時與被動語態(tài)的區(qū)別過去分詞作表語時，強調(diào)主語所處的狀態(tài)；而動詞的被動語態(tài)表示主語是動作的承受者，強調(diào)動作。The library is now closed．(狀態(tài))圖書館現(xiàn)在關(guān)閉了。The cup was broken by my little sister yesterday．(動作)昨天我妹妹把杯子打碎了。2）感覺類及物動詞的現(xiàn)在分詞與過去分詞作表語的區(qū)別過去分詞作表語多表示人自身的感受或事物自身的狀態(tài)，常譯作“感到……的”；現(xiàn)在分詞多表示事物具有的特性，常譯作“令人……的”。
新人教版高中英語必修2Unit 5 Music-Reading and Thinking教案一
This section focuses on "learning about experiencing music Online". This virtual choir is a new form of music performance. Members from all over the world don't need to love to come to a place. Instead, they use the new technology to model the various parts and wonderful virtual harmony group of music in the family. Students need to understand the main meaning of each paragraph. Finding topic sentences is an important way to understand the general idea of a paragraph. After the topic sentence, it is usually the detail sentence that supports and explains the topic sentence. Some paragraphs have obvious subject sentences, for example, the first sentence of the second paragraph is the subject sentence of the paragraph, and the following sentenceStudents need to pay attention to the topic sentences and key sentences, and then pay attention to how the sentences after the meaning explain, explain and support the topic sentences or key sentences before.1.Guide students to learn about experiencing music online2.Guide students to scan and circle the information in the text.3.Guide students to find the numbers and dates to fill in the timeline.4.Guide students to learn more about music by completing the sentences with the correct forms of the words and phrases. And then make a mind map about the outline of the passage.1. Guide students to pay attention to reading strategies, such as prediction, self-questioning and scanning.2. Help students sort out the main meaning of each paragraph and understand the narrative characteristics of "timeline” in illustrative style.3. Lead students to understand the changes that have been caused by the Internet.
新人教版高中英語必修2Unit 5 Music-Reading For Writing教案一
(4)Now we have heard a number of outstanding speeches ... 我們已經(jīng)聆聽了許多精彩的發(fā)言……(5)Because we wanted the nations of the world, working together, to deal with ... 因為我們希望全世界各國團結(jié)起來去應(yīng)對……(6)And if we do not act ... 如果我們不采取行動……(7)Now, I share the concerns that have been expressed ... 我也同意對于……表達的擔(dān)心(8)Let us show the world that by working together we can ... 讓我們告訴全世界，通過一起努力我們可以……(9)It is now time for us to ... 是時候我們……(10)And I have always wished that ... 我一直希望……(11)Thank you for letting me share this day with me.感謝你們和我共度這一天。實踐演練：假如你是高中生李華，你校將舉辦一次以“音樂”為主題的演講比賽，請你按照主題，寫下你的演講稿。注意：詞數(shù)100左右。First of all, thank you for listening to my speech. My topic is: love music like love yourself.Music is like the air we need to maintain our normal lives around us. You can't imagine how terrible a world without music would be. Movies and TV shows have no music, only dry conversations and scenes; mobile phones only vibrations; streets only noisy crowds; cafes, western restaurants only depressed meals. What a terrible world it is!As a student, I hope we all can enjoy the fun brought by music in our spare time. Instead of just listening to music, we can even make our own music. Let's enjoy the fun of music!Thanks again for your attention!
人教版高中語文必修3《馬嵬（其二）》教案2篇
結(jié)合歷史自古以來，江山美人歷來都是引無數(shù)英雄豪杰競折腰的，如果說英雄選擇了美人卻丟了江山，把所有罪名都歸結(jié)于“女人是禍水”。但是，紂王無道，和有了妲己有必然的聯(lián)系嗎？有人說妲己壞透了，壞透了的妲己如果不是取得紂王的信任是壞不起來的，紂王聽信了妲己的讒言，聽與不聽決定權(quán)在紂王，而不在妲己。強勢永遠在紂王一邊。再來看看西施和楊貴妃：西施是作為越國貢獻給吳國的供品來到吳王夫差的身邊的，楊貴妃更是先是李隆基的兒媳婦被看中而得寵的。所以，西施和楊貴妃這兩個可憐的女人根本沒有自己的獨立選擇，沒有獨立的愛情，如果沒有西施，就會有南施，或北施；如果沒有楊貴妃，就會有李貴妃，王貴妃，總之什么施，什么妃是不能少的，因為那是吳王和李隆基的需要。
人教版高中政治必修4價值與價值觀說課稿（一）
預(yù)測回答：成龍在影視，武術(shù)方面的價值，對于某個人，某個集團的價值。知識引導(dǎo)：人的價值體現(xiàn)在多方面的，可以是物質(zhì)方面，也可以是精神方面，可以是對某個人或某個集團的價值，也可以是對人類和社會的價值。設(shè)置目的：從學(xué)生感興趣的人物入手，分析對人的價值的評價。讓學(xué)生自己分析總結(jié)，體現(xiàn)學(xué)生在新課改下的主體地位。從上述事例中我們可以看出人的價值是什么？如何評價？（學(xué)生活動）2．人的價值：在于創(chuàng)造價值，在于對社會的責(zé)任和貢獻，即通過自己的活動滿足自己所屬的社會、他人以及自己的需要。（幻燈片顯示）3．人的價值評價：看他的貢獻，最根本的是對社會發(fā)展和人類進步事業(yè)的貢獻。（幻燈片顯示）老師總結(jié)：對社會的貢獻并不是高高在上，不可觸及。只要是做自己該做的事，從身邊的小事做起，普普通通的勞動就是貢獻社會和他人。學(xué)生歸納：人生價值原理二、價值觀的導(dǎo)向作用（板書）1．價值觀的含義人們在認識各種具體事物的價值的基礎(chǔ)上，形成對事物價值的總的看法和根本觀點。
人教版高中歷史必修3宋明理學(xué)說課稿3篇
陸王心學(xué)與程朱理學(xué)相比有何異同？生 不同點：在理的內(nèi)涵上不同，程朱理學(xué)認為“理”是貫通于宇宙、人倫的客觀存在，是一種普遍的規(guī)律準則；陸王心學(xué)認為心即理，是“良知”，認為人心便是世界萬物的本原。方法上也有不同：前者向外追究，“格物致知”；后者向內(nèi)探求，“發(fā)明本心”以求理，克服私欲、回復(fù)良知。生 相同點：都提出了一個宇宙、社會、人生遵循的“理”。師 對。程朱理學(xué)是客觀唯心主義，陽明心學(xué)是主觀唯心主義。這兩者的分歧是理學(xué)范圍內(nèi)的分歧，其基本思想是一致的。師 宋明理學(xué)與漢唐以前的儒學(xué)比較，最大的特點在于批判地吸收了佛教哲學(xué)的思辨結(jié)構(gòu)和道教的宇宙生成論，將儒家的倫理學(xué)說概括升華為哲學(xué)基本問題。其實質(zhì)是把佛、道“養(yǎng)性”“修身”引向儒家的“齊家”“治國”“平天下”，對儒家的綱常道德給予哲學(xué)論證，使之神圣化、絕對化、普遍化，以便深入人心，做到人人遵而行之。
人教版高中語文必修3《勸學(xué)》說課稿3篇
《勸學(xué)》是普通高中課程標準試驗教科書語文必修三第三單元的重點篇目，該文集中反映著名思想家荀子在學(xué)習(xí)問題上的觀點和精彩斐然的論證藝術(shù)。該單元所選課文都是古代的議論性散文。通過本單元的學(xué)習(xí)在于讓學(xué)生感受我國傳統(tǒng)文化的精神，掌握基礎(chǔ)的文言語法知識，學(xué)習(xí)如何清晰有力的表達自己的思想和見解。本文安排在單元的第一篇，如何指導(dǎo)學(xué)生學(xué)好這篇課文，是實現(xiàn)“授之以漁”，樹立學(xué)生學(xué)好文言文的信心，掌握文言學(xué)習(xí)方法的關(guān)鍵。根據(jù)新課標倡導(dǎo)從“知識與能力”、“過程與方法”、“情感態(tài)度與價值觀”三方面出發(fā)設(shè)計課程目標的要求和高一的學(xué)生對于文言文的知識還在積累的階段，應(yīng)該注重基礎(chǔ)知識的積累和一定量的誦讀的實際情況。我擬確定以下教學(xué)目標：1，了解荀子論述學(xué)習(xí)的思想，明確學(xué)習(xí)要靠積累、堅持不懈、專心致志的道理。2，掌握積累文言實詞、虛詞，活用、古今異議等現(xiàn)象和固定句式。
人教版高中政治必修4生活處處有哲學(xué)說課稿
（二）組織學(xué)生探究知識并形成新的知識。我從學(xué)生的生活體驗入手，運用案例等形式創(chuàng)設(shè)情境呈現(xiàn)問題，使學(xué)生在自主探索、合作交流的過程中，發(fā)現(xiàn)問題、分析問題、解決問題，在問題的分析與解決中主動構(gòu)建知識。主要通過幾幅漫畫讓學(xué)生思考其中的哲學(xué)道理，開始接觸哲學(xué)。漫畫一：種瓜得瓜，種豆得豆，種雞蛋得??漫畫二：甲：下雨好極啦！乙：下雨糟透了！漫畫三：——狂妄之徒，你竟然壞了祖上規(guī)矩！在引導(dǎo)學(xué)生思考、體驗問題的過程中，可以使學(xué)生逐步學(xué)會分析、解決問題的方法。這樣做既有利于發(fā)展學(xué)生的理解、分析、概括、想象等創(chuàng)新思維能力，又有利于學(xué)生表達、動手、協(xié)作等實踐能力的提高，促進學(xué)生全面發(fā)展，力求實現(xiàn)教學(xué)過程與教學(xué)結(jié)果并重，知識與能力并重的目標。
新人教版高中英語必修3Unit 4 Space Exploration-Discovering Useful Structures導(dǎo)學(xué)案
【點津】 1.不定式的復(fù)合結(jié)構(gòu)作目的狀語 ,當不定式或不定式短語有自己的執(zhí)行者時，要用不定式的復(fù)合結(jié)構(gòu)?即在不定式或不定式短語之前加 for ＋名詞或賓格代詞?作狀語。He opened the door for the children to come in. 他開門讓孩子們進來。目的狀語從句與不定式的轉(zhuǎn)換 英語中的目的狀語從句，還可以變?yōu)椴欢ㄊ交虿欢ㄊ蕉陶Z作狀語，從而使句子在結(jié)構(gòu)上得以簡化。可分為兩種情況： 1?當目的狀語從句中的主語與主句中的主語相同時，可以直接簡化為不定式或不定式短語作狀語。We'll start early in order that/so that we may arrive in time. →We'll start early in order to/so as to arrive in time. 2?當目的狀語從句中的主語與主句中的主語不相同時，要用動詞不定式的復(fù)合結(jié)構(gòu)作狀語。I came early in order that you might read my report before the meeting. →I came early in order for you to read my report before the meeting.
人教版高中政治必修4第十二課實現(xiàn)人生的價值教案
有的學(xué)者還指出，要堅持集體主義還必須將集體主義的價值精神與社會主義市場經(jīng)濟的要求結(jié)合起來，批判地繼承計劃經(jīng)濟時代倡導(dǎo)的集體主義，合理地對其進行體系結(jié)構(gòu)的調(diào)整和內(nèi)容的更新，形成新的集體主義。與傳統(tǒng)的集體主義相比，這種新的集體主義應(yīng)具有如下兩個主要特點。其一，強調(diào)集體的出發(fā)點是為了維護集體成員的正當個人利益。傳統(tǒng)的集體主義具有片面強調(diào)集體至上性、絕對性的弊端；新的集體主義必須依據(jù)社會主義市場經(jīng)濟的現(xiàn)實要求，將集體應(yīng)當對個人承擔(dān)的義務(wù)加以科學(xué)的闡釋。真正的集體應(yīng)該維護各個集體成員的個人利益，實現(xiàn)組成集體的各個主體的自我價值。這種新型的集體主義是對社會主義市場經(jīng)濟條件下社會關(guān)系的真實反映，既與個人主義有本質(zhì)區(qū)別，也不同于傳統(tǒng)的集體主義。其二，要體現(xiàn)道德要求的先進性與廣泛性的統(tǒng)一。
人教版高中政治必修3第二課文化對人的影響精品教案
民族精神是一個民族賴以生存和發(fā)展的精神支撐。一個民族，沒有振奮的精神和高尚的品格，不可能自立于世界民族之林。“鐵人”精神是“愛國、創(chuàng)業(yè)、求實、奉獻”的大慶精神的典型化、人格化。其主要方面包括：“為祖國分憂、為民族爭氣”的愛國主義精神；為“早日把中國石油落后的帽子甩到太平洋里去”，“寧肯少活二十年，拼命也要拿下大油田”的忘我拼搏精神；干事業(yè)“有條件要上，沒有條件創(chuàng)造條件也要上”的艱苦奮斗精神；“要為油田負責(zé)一輩子”，“干工作要經(jīng)得起子孫萬代檢查”，對工作精益求精，為革命“練一身硬功夫、真本事”的科學(xué)求實精神；不計名利，不計報酬，埋頭苦干的“老黃?！本?；等等。40多年來，“鐵人”精神早已家喻戶曉，深入人心，成為大慶人的共同理想、信念和行為準則。“鐵人”精神是對王進喜崇高思想、優(yōu)秀品德的高度概括，體現(xiàn)了我國工人階級精神風(fēng)貌和中華民族傳統(tǒng)美德的完美結(jié)合?！拌F人”精神是戰(zhàn)勝困難、勇往直前、不斷取得新勝利的巨大精神力量。“鐵人”精神是我們強大的精神支柱。
人教版高中政治必修3第六課我們的中華文化精品教案
（三）、中華之瑰寶．民族之驕傲1．我國各具特色的民族文化異彩紛呈．都為中華文化的形成和發(fā)展做出了重要貢獻(1)我國的雕刎建筑藝術(shù)是各族人民共同創(chuàng)造的，都是中華文化的瑰寶。例如：敦煌石窟、云岡石窟；克孜爾千佛洞等，是古代的漢族、鮮卑以及西域各族的藝術(shù)家和勞動人民共同創(chuàng)造的。(2)許多少數(shù)民族用自己的語言文字創(chuàng)造了優(yōu)秀的民族文學(xué)。例如：藏族的《格薩爾王傳》、蒙古族的《江格爾》和柯爾克孜族的《瑪納斯》被并為三大英雄史詩。◇注意：民族文化深深地體現(xiàn)著各民族的風(fēng)俗和精神面貌，通過一定的物質(zhì)展現(xiàn)，可以表現(xiàn)在建筑、民族文學(xué)、舞蹈、習(xí)俗、信仰、衣著等方方面面?！簏c撥：“相關(guān)鏈接”中提到的《江格爾)是蒙古族衛(wèi)拉特郝英雄史詩。史詩的篇幸結(jié)構(gòu)、故事情節(jié)、語言風(fēng)格等具有蒙古族說唱藝術(shù)的特點。從民族文學(xué)角度反映了本民族的文化生活．同時也為中華文化增添了絢麗色彩?！笳n堂探究：(1)你還知道哪蝗少數(shù)民族舞蹈?它們務(wù)有什么特點?
人教版高中政治必修4第八課唯物辯證法的發(fā)展觀教案
1973年4月的一天，一名男子站在紐約的街頭，掏出一個約有兩塊磚頭大的無線電話，并開始通話。這個人就是手機的發(fā)明者馬丁，當時他是摩托羅拉公司的工程技術(shù)人員。這是當時世界上第一部移動電話。1985年，第一臺現(xiàn)代意義上的可以商用的移動電話誕生。它是將電源和天線放置在一個盒子里，重量達3公斤。與現(xiàn)代形狀接近的手機誕生于1987年，其重量大約750克，與今天僅重60克的手機相比，像一塊大磚頭。此后，手機的“瘦身”越來越迅速。1991年，手機重量為250克左右。1996年秋，r出現(xiàn)了體積為100立方厘米、重量100克的手機。此后，又進一步小型化，輕型化，到1999年就輕到了60克以下。手機的體積越來越小，但功能卻越來越多。以前的手機是用來通話的，現(xiàn)在的手機是用來享受的。今天，手機可以是相機、游戲機、音樂播放器、信用卡、電影院……手機帶來的不僅僅是通信方式的改變，更是生活方式的變革。
人教版高中政治必修4第六課求索真理的歷程教案
農(nóng)業(yè)科學(xué)的周期是以年為時間單位，一次實驗就要等到一次花開、結(jié)果。就這樣，幾個實驗誤導(dǎo)了袁隆平好幾年。這時登在《參考消息》上的一篇不起眼的文章像給迷途中的袁隆平以當頭一棒：克里克、沃森和威爾金斯發(fā)現(xiàn)DNA螺旋結(jié)構(gòu)，西方的遺傳學(xué)研究進入分子水平?！拔耶敃r還在那里搞什么無性雜交，糟糕得很”。水稻是自花授粉植物，雄蕊雌蕊都在一朵花里面，雌雄同株，沒有雜種優(yōu)勢一雜種優(yōu)勢是生物界的普遍現(xiàn)象，小到細菌，大到人，近親繁殖的結(jié)果是種群的退化。但是水稻因為花小，其雜交是當時公認的世界難題，設(shè)在馬尼拉的世界水稻研究中心就是因為困難重重，差點關(guān)閉。袁隆平偏不信這個邪，他突發(fā)靈感：專門培養(yǎng)一種特殊的水稻品種——雄花退化的雄性不育系，沒有自己的花粉，這樣不就可以做到雜種優(yōu)勢了嗎?于是，漫長的尋找過程開始了，要找到這樣一株雄花退化而且雜交之后產(chǎn)量猛增的“太監(jiān)”水稻簡直是大海撈針。
