當孩子們由父母陪同時,他們才被允許進入這個運動場。3.過去分詞(短語)作狀語時的幾種特殊情況(1)過去分詞(短語)在句中作時間、條件、原因、讓步狀語時,相當于對應的時間、條件、原因及讓步狀語從句。Seen from the top of the mountain (=When it is seen from the top of the mountain), the whole town looks more beautiful.從山頂上看,整個城市看起來更美了。Given ten more minutes (=If we are given ten more minutes), we will finish the work perfectly.如果多給十分鐘,我們會完美地完成這項工作。Greatly touched by his words (=Because she was greatly touched by his words), she was full of tears.由于被他的話深深地感動,她滿眼淚花。Warned of the storm (=Though they were warned of the storm), the farmers were still working on the farm.盡管被警告了風暴的到來,但農(nóng)民們?nèi)栽谵r(nóng)場干活。(2)過去分詞(短語)在句中作伴隨、方式等狀語時,可改為句子的并列謂語或改為并列分句。The teacher came into the room, followed by two students (=and was followed by two students).后面跟著兩個學生,老師走進了房間。He spent the whole afternoon, accompanied by his mom(=and was accompanied by his mom).他由母親陪著度過了一整個下午。
教法分析:在新課程的教學中教師要向?qū)W生提供從事數(shù)學活動的機會,倡導讓學生親身經(jīng)歷數(shù)學知識的形成與應用過程,鼓勵學生自主探索與合作交流,讓學生在實踐中體驗、學習。因此,本節(jié)課我采用了多媒體輔助教學與學生動手操作、觀察、討論的方式,一方面能夠直觀、生動地反映各種圖形的特征,增加課堂的容量,吸引學生注意力,激發(fā)學生的學習興趣;另一方面也有利于突出重點、突破難點,更好地提高課堂效率。學法分析:初二年級學習對新事物比較敏感,通過新課程教學的實施,學生已具有一定探索學習與合作交流的習慣。但是一下子要學生從直觀的圖形去概括出抽象圖形全等的概念這是比較困難的。因此,我指導學生:一要善于觀察發(fā)現(xiàn);二要勇于探索、動手實驗;三要把自己的所思所想大膽地進行交流,從而得出正確的結論,并掌握知識。
中班的幼兒開始愿意探究新異的事物或現(xiàn)象來滿足自己的好奇心,所以,我們的科學活動設計要在淺顯易懂,適合中班幼兒年齡特征的同時,引發(fā)幼兒對科學的初步探究能力。中班的幼兒已經(jīng)具有注意到新異事物或現(xiàn)象的,因此,我們在設計科學活動時要讓幼兒充分發(fā)揮想象,對磁鐵這種“新異”事物提出問題,如什么是磁鐵?什么時候看見過磁鐵?等等類似的問題,可以增強幼兒的探索興趣,提高幼兒的探索的積極性,有利于激發(fā)幼兒的想象力?! ≈邪嘤變褐饕跃唧w形象為主,需要具體的活動場景和活動形式,所以活動設計要提供幼兒合適的情景以提供操作思考的機會,進一步發(fā)展幼兒的自主性和主動性。中班幼兒與小班幼兒相比,活動時間也有所增加,因此也需要在活動時間上給予一定的保證。
本人所教的兩個班級學生普遍存在著數(shù)學科基礎知識較為薄弱,計算能力較差,綜合能力不強,對數(shù)學學習有一定的困難。在課堂上的主體作用的體現(xiàn)不是太充分,但是他們能意識到自己的不足,對數(shù)學課的學習興趣高,積極性強。 學生在學習交往上表現(xiàn)為個別化學習,課堂上較為依賴老師的引導。學生的群體性小組交流能力與協(xié)同討論學習的能力不強,對學習資源和知識信息的獲取、加工、處理和綜合的能力較低。在教學中盡量分析細致,減少跨度較大的環(huán)節(jié),對重要的推導過程采用板書方式逐步進行,力求讓絕大多數(shù)學生接受。 1.理解橢圓標準方程的推導;掌握橢圓的標準方程;會根據(jù)條件求橢圓的標準方程,會根據(jù)橢圓的標準方程求焦點坐標. 2.通過橢圓圖形的研究和標準方程的討論,使學生掌握橢圓的幾何性質(zhì),能正確地畫出橢圓的圖形,并了解橢圓的一些實際應用。 1.讓學生經(jīng)歷橢圓標準方程的推導過程,進一步掌握求曲線方程的一般方法,體會數(shù)形結合等數(shù)學思想;培養(yǎng)學生運用類比、聯(lián)想等方法提出問題. 2.培養(yǎng)學生運用數(shù)形結合的思想,進一步掌握利用方程研究曲線的基本方法,通過與橢圓幾何性質(zhì)的對比來提高學生聯(lián)想、類比、歸納的能力,解決一些實際問題。 1.通過具體的情境感知研究橢圓標準方程的必要性和實際意義;體會數(shù)學的對稱美、簡潔美,培養(yǎng)學生的審美情趣,形成學習數(shù)學知識的積極態(tài)度. 2.進一步理解并掌握代數(shù)知識在解析幾何運算中的作用,提高解方程組和計算能力,通過“數(shù)”研究“形”,說明“數(shù)”與“形”存在矛盾的統(tǒng)一體中,通過“數(shù)”的變化研究“形”的本質(zhì)。幫助學生建立勇于探索創(chuàng)新的精神和克服困難的信心。
教學目的:理解并熟練掌握正態(tài)分布的密度函數(shù)、分布函數(shù)、數(shù)字特征及線性性質(zhì)。教學重點:正態(tài)分布的密度函數(shù)和分布函數(shù)。教學難點:正態(tài)分布密度曲線的特征及正態(tài)分布的線性性質(zhì)。教學學時:2學時教學過程:第四章 正態(tài)分布§4.1 正態(tài)分布的概率密度與分布函數(shù)在討論正態(tài)分布之前,我們先計算積分。首先計算。因為(利用極坐標計算)所以。記,則利用定積分的換元法有因為,所以它可以作為某個連續(xù)隨機變量的概率密度函數(shù)。定義 如果連續(xù)隨機變量的概率密度為則稱隨機變量服從正態(tài)分布,記作,其中是正態(tài)分布的參數(shù)。正態(tài)分布也稱為高斯(Gauss)分布。
教學準備 1. 教學目標 知識與技能掌握雙曲線的定義,掌握雙曲線的四種標準方程形式及其對應的焦點、準線.過程與方法掌握對雙曲線標準方程的推導,進一步理解求曲線方程的方法——坐標法.通過本節(jié)課的學習,提高學生觀察、類比、分析和概括的能力.情感、態(tài)度與價值觀通過本節(jié)的學習,體驗研究解析幾何的基本思想,感受圓錐曲線在刻畫現(xiàn)實和解決實際問題中的作用,進一步體會數(shù)形結合的思想.2. 教學重點/難點 教學重點雙曲線的定義及焦點及雙曲線標準方程.教學難點在推導雙曲線標準方程的過程中,如何選擇適當?shù)淖鴺讼担?3. 教學用具 多媒體4. 標簽
教 學 過 程教師 行為學生 行為教學 意圖時間 *揭示課題 8.4 圓(二) *創(chuàng)設情境 興趣導入 【知識回顧】 我們知道,平面內(nèi)直線與圓的位置關系有三種(如圖8-21): (1)相離:無交點; (2)相切:僅有一個交點; (3)相交:有兩個交點. 并且知道,直線與圓的位置關系,可以由圓心到直線的距離d與半徑r的關系來判別(如圖8-22): (1):直線與圓相離; (2):直線與圓相切; (3):直線與圓相交. 介紹 講解 說明 質(zhì)疑 引導 分析 了解 思考 思考 帶領 學生 分析 啟發(fā) 學生思考 0 15*動腦思考 探索新知 【新知識】 設圓的標準方程為 , 則圓心C(a,b)到直線的距離為 . 比較d與r的大小,就可以判斷直線與圓的位置關系. 講解 說明 引領 分析 思考 理解 帶領 學生 分析 30*鞏固知識 典型例題 【知識鞏固】 例6 判斷下列各直線與圓的位置關系: ⑴直線, 圓; ⑵直線,圓. 解?、?由方程知,圓C的半徑,圓心為. 圓心C到直線的距離為 , 由于,故直線與圓相交. ⑵ 將方程化成圓的標準方程,得 . 因此,圓心為,半徑.圓心C到直線的距離為 , 即由于,所以直線與圓相交. 【想一想】 你是否可以找到判斷直線與圓的位置關系的其他方法? *例7 過點作圓的切線,試求切線方程. 分析 求切線方程的關鍵是求出切線的斜率.可以利用原點到切線的距離等于半徑的條件來確定. 解 設所求切線的斜率為,則切線方程為 , 即 . 圓的標準方程為 , 所以圓心,半徑. 圖8-23 圓心到切線的距離為 , 由于圓心到切線的距離與半徑相等,所以 , 解得 . 故所求切線方程(如圖8-23)為 , 即 或. 說明 例題7中所使用的方法是待定系數(shù)法,在利用代數(shù)方法研究幾何問題中有著廣泛的應用. 【想一想】 能否利用“切線垂直于過切點的半徑”的幾何性質(zhì)求出切線方程? 說明 強調(diào) 引領 講解 說明 引領 講解 說明 觀察 思考 主動 求解 思考 主動 求解 通過例題進一步領會 注意 觀察 學生 是否 理解 知識 點 50
一、教學目標(一)知識教育點使學生掌握拋物線的定義、拋物線的標準方程及其推導過程.(二)能力訓練點要求學生進一步熟練掌握解析幾何的基本思想方法,提高分析、對比、概括、轉(zhuǎn)化等方面的能力.(三)學科滲透點通過一個簡單實驗引入拋物線的定義,可以對學生進行理論來源于實踐的辯證唯物主義思想教育.二、教材分析1.重點:拋物線的定義和標準方程.2.難點:拋物線的標準方程的推導.三、活動設計提問、回顧、實驗、講解、板演、歸納表格.四、教學過程(一)導出課題我們已學習了圓、橢圓、雙曲線三種圓錐曲線.今天我們將學習第四種圓錐曲線——拋物線,以及它的定義和標準方程.課題是“拋物線及其標準方程”.首先,利用籃球和排球的運動軌跡給出拋物線的實際意義,再利用太陽灶和拋物線型的橋說明拋物線的實際用途。
【詞匯精講】highlight n.最好或最精彩的部分 vt.突出;強調(diào);使醒目One of the highlights of the trip was seeing the Taj Mahal.這次旅行的亮點之一是參觀泰姬陵。Your resume should highlight your skills and achievements.你的簡歷應該突出你的技能和成就。The report highlights the major problems facing society today.報告強調(diào)了當今社會所面臨的主要問題。I’ve highlighted the important passages in yellow.我用黃色標出了重要段落。7.Edmonton is freezing cold in winter,with daily temperatures averaging -10 ℃.埃德蒙頓冬季寒冷,日平均氣溫為-10°C?!驹~匯精講】freezing adj.極冷的;冰凍的Leave a basin of water outside in freezing weather.在冰凍的天氣里,放一盆水在室外。It’s freezing cold outside so wear a warm coat.外面超冷的,所以穿一個暖和一點的外套吧。8.It was not until 9:30 a.m.that they finally reached the capital of Ontario,Toronto.直到上午9時30分,他們才終于到達多倫多的首府安大略省?!揪涫狡饰觥勘揪涫且粋€強調(diào)句,強調(diào)的是句子的時間狀語until 9:30。含有not...until...的句子的強調(diào)句為It is not until...that...,that后面的句子要用肯定形式。It was not until then that I suddenly realized nobody was happier than I was.直到那時我才突然意識到?jīng)]有人比我更幸福了。
Her tutor told her to acknowledge __________ other people had said if she cited their ideas, and advised her _______(read) lots of information in order to form __________wise opinion of her own.Now halfway __________ her exchange year, Xie Lei felt much more at home in the UK. She said __________ (engage) in British culture had helped and that she had been__________ (involve) in social activities. She also said while learning about business, she was acting as a cultural messenger __________(build) a bridge between the two countries. keys:Xie Lei, a 19yearold Chinese student, said goodbye to her family and friends in China and boarded (board) a plane for London six months ago in order to get a business qualification. She was ambitious(ambition) to set up a business after graduation. It was the first time that she had left (leave) home.At first, Xie Lei had to adapt to life in a different country. She chose to live with a host family, who can help with her adaptation (adapt) to the new culture. When she missed home, she felt comforted (comfort) to have a second family. Also Xie Lei had to satisfy academic requirements. Her tutor told her to acknowledge what other people had said if she cited their ideas, and advised her to read lots of information in order to form a wise opinion of her own.Now halfway through her exchange year, Xie Lei felt much more at home in the UK. She said engaging (engage) in British culture had helped and that she had been involved (involve) in social activities. She also said while learning about business, she was acting as a cultural messenger building a bridge between the two countries.
The theme of this part is to write an article about healthy diet. Through reading and writing activities, students can accumulate knowledge about healthy diet, deepen their understanding of the theme of healthy diet, and reflect on their own eating habits. This text describes the basic principles of healthy diet. The author uses data analysis, definition, comparison, examples and other methods. It also provides a demonstration of the use of conjunctions, which provides important information reference for students to complete the next collaborative task, writing skills, vivid language materials and expressions.1. Teach Ss to learn and skillfully use the new words learned from the text.2. Develop students’ ability to understand, extract and summarize information.3. Guide students to understand the theme of healthy diet and reflect on their own eating habits.4. To guide students to analyze and understand the reading discourse from the aspects of theme content, writing structure, language expression, etc., 5. Enable Ss to write in combination with relevant topics and opinions, and to talk about their eating habits.1. Guide students to analyze and understand the reading discourse from the aspects of theme content, writing structure, language expression, etc.2. Enable them to write in combination with relevant topics and opinions, and to talk about their eating habits.3. Guide the students to use the cohesive words correctly, strengthen the textual cohesion, and make the expression fluent and the thinking clear.Step1: Warming upbrainstorm some healthy eating habits.1.Eat slowly.2.Don’t eat too much fat or sugar.3.Eat healthy food.4.Have a balanced diet.Step2: Read the passage and then sum up the main idea of each paragraph.
假定你是英國的Jack,打算來中國旅行,請你給你的中國筆友李華寫一封信,要點如下:1.你的旅行計劃:北京→泰山→杭州;2.征求建議并詢問他是否愿意充當你的導游。注意:1.詞數(shù)80左右(開頭和結尾已給出,不計入總詞數(shù));2.可以適當增加細節(jié),以使行文連貫。參考詞匯:故宮 the Forbidden City;泰山 Mount TaiDear Li Hua,I'm glad to tell you that 'm going to visit China.First,I am planning to visit Beijing,the capitalof China,where I am looking forward to enjoying the Great Wall,the Forbidden City and somebeautiful parks.Then I intend to go to visit Mount Tai in Shandong Province.I've heard that it is one ofthe most famous mountains in China and I can't wait to enjoy the amazing sunrise there.After that,I amalso going to Hangzhou.It is said that it is a beautiful modern city with breathtaking natural sights,among which the West Lake is a well- known tourist attraction.What do you think of my travel plan? Will you act as my guide? Hope to hear from you soon.
The theme of the listening section is " talking about scenery and culture along a journey."The part is designed to further lead the students to understand Canadian natural geography and social environment, and integrated into the cultural contrast by mentioning the long train journey from Beijing to Moscow routes. On this basis, the part activates students related travel experience, lets the student serial dialogue, guides the student to explore further the pleasure and meaning of the long journey, and Chinese and foreign cultural comparison.The part also provides a framework for the continuation of the dialogue, which is designed to provide a framework for students to successfully complete their oral expressions, and to incorporate an important trading strategy to end the dialogue naturally.1. Help students to understand and master some common English idioms in the context, and experience the expression effect of English idioms.2. Guide the students to understand the identity of different people in the listening context, and finish the dialogue according to their own experience.3. Instruct the students to use appropriate language to express surprise and curiosity about space and place in the dialogue, and master the oral strategy of ending the dialogue naturally.1. Instruct students to grasp the key information and important details of the dialogue.2. Instruct students to conduct a similar talk on the relevant topic.
The purpose of this section of vocabulary exercises is to consolidate the key words in the first part of the reading text, let the students write the words according to the English definition, and focus on the detection of the meaning and spelling of the new words. The teaching design includes use English definition to explain words, which is conducive to improving students' interest in vocabulary learning, cultivating their sense of English language and thinking in English, and making students willing to use this method to better grasp the meaning of words, expand their vocabulary, and improve their ability of vocabulary application. Besides, the design offers more context including sentences and short passage for students to practice words flexibly.1. Guide students to understand and consolidate the meaning and usage of the vocabulary in the context, 2. Guide the students to use the unit topic vocabulary in a richer context3. Let the students sort out and accumulate the accumulated vocabulary, establishes the semantic connection between the vocabulary,4. Enable students to understand and master the vocabulary more effectivelyGuiding the Ss to use unit topic words and the sentence patterns in a richer context.Step1: Read the passage about chemical burns and fill in the blanks with the correct forms of the words in the box.
The theme of this activity is to learn the first aid knowledge of burns. Burns is common in life, but there are some misunderstandings in manual treatment. This activity provides students with correct first aid methods, so as not to take them for granted in an emergency. This section guides students to analyze the causes of scald and help students avoid such things. From the perspective of text structure and collaborative features, the text is expository. Expository, with explanation as the main way of expression, transmits knowledge and information to readers by analyzing concepts and elaborating examples. This text arranges the information in logical order, clearly presents three parts of the content through the subtitle, accurately describes the causes, types, characteristics and first aid measures of burns, and some paragraphs use topic sentences to summarize the main idea, and the level is very clear.1. Guide students to understand the causes, types, characteristics and first aid methods of burns, through reading2. Enhance students’ ability to deal withburnss and their awareness of burns prevention3. Enable students to improve the ability to judge the types of texts accurately and to master the characteristics and writing techniques of expository texts.Guide students to understand the causes, types, characteristics and first aid methods of burns, through readingStep1: Lead in by discussing the related topic:1. What first-aid techniques do you know of ?CPR; mouth to mouth artificial respiration; the Heimlich Manoeuvre
The activity theme of this section is to design various activities around the key words in the first text. Therefore, the activities require students to pay attention to the spelling of words. On the other hand, let students grasp the meaning of words more accurately through sentences and short texts. This kind of teaching design also helps to improve the ability of using English thinking.1. Cultivating students' ability to use word formation to induce and memorize vocabulary, and the ability to use lexical chunks to express meaning.2. Guide the students to think independently and use the correct form of words to complete sentences3. Cultivate students' habit of using lexical chunks to express language completely, guide students to draw words in sentences quickly, pay attention to word collocation, so as to accumulate more authentic expressions4. Instruct students to create sentences with the chunks.1. Enable students to use the language points in the real situation or specific contexts flexibly and appropriately.2. Guiding the Ss to use unit topic words and the sentence patterns in a richer context.Step1: Think of a word that best fits each definition.1. to remember sth2.to accept, admit, or recognize sth or the truth/existence of sth3. the process of changing sth or yourself to suit a new situation4 .to make sb feel less worried or unhappy5. a strong desire to achieve sth
? B: Absolutely! Getting involved with Chinese cultural activities there definitely helped a lot. I got to practice my Chinese on a daily basis, and I could learn how native Chinese speakers spoke.? A: What do you feel is your biggest achievement?? B: Learning Chinese characters! I have learnt about 1,500 so far. When I first started, I didn't think it was even going to be possible to learn so many, but now I find that I can read signs, menus, and even some easy newspaper articles.? A: What are you most keen on?? B: I've really become keen on learning more about the Chinese culture, in particular Chinese calligraphy. As I have learnt Chinese characters, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way. ? A: Finally, what do you want to say to anyone interested in learning Chinese?? I have really become keen on learning more about the Chinese culture, in particular Chinese Calligraphy. As I have learnt Chinese character, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way.? A: Finally, what do you want to say to anyone interested in learning Chinese?? B: I'd say, give it a shot! While some aspects may be difficult, it is quite rewarding and you will be happy that you tried.? A: Thanks for your time. ? B:You're welcome.
This section guides students to pay attention to the typical context of vocabulary use, helps students accumulate vocabulary around the key vocabulary of this unit, and uses the learned words and word chunks in different contexts to deeply understand their meaning and usage, so as to achieve the purpose of review and consolidation.The teaching design activities aim to guide students to pay attention to the typical context in which the target vocabulary is used, as well as the common vocabulary used in collocation, so that students can complete the sentence with correct words. In terms of vocabulary learning strategies, this unit focuses on cultivating students' ability to pay attention to collocation of words and to use word blocks to express meaning.For vocabulary learning, it is not enough just to know the meaning of a single word, but the most important thing is to master the common collocations of words, namely word blocks.Teachers should timely guide students to summarize common vocabulary collocation, such as verb and noun collocation, verb and preposition collocation, preposition and noun collocation, and so on.1. Guide students to understand and consolidate the meaning and usage of the vocabulary in the context, 2. Guide the students to use the unit topic vocabulary in a richer context3. Let the students sort out and accumulate the accumulated vocabulary, establishes the semantic connection between the vocabulary,4. Enable students to understand and master the vocabulary more effectivelyGuiding the Ss to use unit topic words and the sentence patterns in a richer context.
1. We'll need ten months at least to have the restaurant decorated.2.Some traditional Chinese dishes from before the Ming Dynasty are still popular today.3.My grandpa's breakfast mainly includes whole grain biscuits and a glass of milk.4.People in this area would eat nearly a kilo of cheese per week.5. We enjoyed a special dinner in a fancy restaurant where the waiters all wore attractive suits.6. He prefers this brand of coffee which, as he said, has an unusually good flavor.Key:1. at a minimum 2. prior to3. consist of4. consume5. elegant6. exceptionalStep 5:Familiarize yourself with some food idioms by matching the meaning on the right with the colored words on the left.1.Public concern for the health of farm animals has mushroomed in the UK2.Anderson may be young but he's certainly rolling to doing dough!3.George is a popular lecturer. He often peppers his speech with jokes.4.As the person to bring home the bacon, he needs to find a stable job.5 He is often regarded as a ham actor for his over emphasized facial expressions. The media reported that these companies had treated pollution as a hot potato. 6.The media reported that these companies had treated pollution as a hot potato.7.Don't worry about the test tomorrow. It's going to be a piece of cake!8. It's best to fold the swimming ring when it is as flat as a pancake.A. completely flatB. something that is very easy to do C.an issue that is hard to deal withD.to include large numbers of somethingE.to earn on e's living to support a familyF. wealthyG.to rapidly increase in numberH. an actor who performs badly, especially by over emphasizing emotions
你校英語報計劃出版一期急救常識???現(xiàn)面向全校學生公開征集稿件,你有意參加。請你根據(jù)下面提示內(nèi)容,用英語寫一篇短文,介紹在車禍現(xiàn)場對傷者進行急救的方法和步驟。1.確?,F(xiàn)場的安全;2.詢問傷者,確保其呼吸正常;3.檢查傷口,如流血則應采取止血措施;4.如需急救,確保其處于康復位置。注意:1.詞數(shù)80左右;2.可以適當增加細節(jié),以使行文連貫。參考詞匯:康復位置 recovery positionAs we all know, having a knowledge of first aid can make a great difference in our daily life. If a traffic accident happens and someone is injured, the following steps can be used to treat the injured.In the first place, we should make sure that the accident scene is safe so that we won’t get hurt. We should ask the injured person if he is OK, and see if he is breathing. What’s more, we should check for cuts and wounds. If he is bleeding badly, it is vital that we should try to stop the bleeding by applying pressure to the injury. This is because if a person loses too much blood, he may die. If necessary, take the injured person to the hospital as soon as possible.Do remember: when giving first aid, please be sure to place the person in a recovery position.
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