当孩子们由父母陪同时,他们才被允许进入这个运动场。3.过去分词(短语)作状语时的几种特殊情况(1)过去分词(短语)在句中作时间、条件、原因、让步状语时,相当于对应的时间、条件、原因及让步状语从句。Seen from the top of the mountain (=When it is seen from the top of the mountain), the whole town looks more beautiful.从山顶上看,整个城市看起来更美了。Given ten more minutes (=If we are given ten more minutes), we will finish the work perfectly.如果多给十分钟,我们会完美地完成这项工作。Greatly touched by his words (=Because she was greatly touched by his words), she was full of tears.由于被他的话深深地感动,她满眼泪花。Warned of the storm (=Though they were warned of the storm), the farmers were still working on the farm.尽管被警告了风暴的到来,但农民们仍在农场干活。(2)过去分词(短语)在句中作伴随、方式等状语时,可改为句子的并列谓语或改为并列分句。The teacher came into the room, followed by two students (=and was followed by two students).后面跟着两个学生,老师走进了房间。He spent the whole afternoon, accompanied by his mom(=and was accompanied by his mom).他由母亲陪着度过了一整个下午。
Step 7: complete the discourse according to the grammar rules.Cholera used to be one of the most 1.__________ (fear) diseases in the world. In the early 19th century, _2_________ an outbreak of cholera hit Europe, millions of people died. But neither its cause, 3__________ its cure was understood. A British doctor, John Snow, wanted to solve the problem and he knew that cholera would not be controlled _4_________ its cause was found. In general, there were two contradictory theories 5 __________ explained how cholera spread. The first suggested that bad air caused the disease. The second was that cholera was caused by an _6_________(infect) from germs in food or water. John Snow thought that the second theory was correct but he needed proof. So when another outbreak of cholera hit London in 1854, he began to investigate. Later, with all the evidence he _7_________ (gather), John Snow was able to announce that the pump water carried cholera germs. Therefore, he had the handle of the pump _8_________ (remove) so that it couldn't be used. Through his intervention,the disease was stopped in its tracks. What is more, John Snow found that some companies sold water from the River Thames that __9__________________ (pollute) by raw waste. The people who drank this water were much more likely _10_________ (get) cholera than those who drank pure or boiled water. Through John Snow's efforts, the _11_________ (threaten) of cholera around the world saw a substantial increase. Keys: 1.feared 2.when 3. nor 4.unless 5.that/which 6.infection 7.had gathered 8.removed 9.was polluted 10.to get 11. threat
Step 5: After learning the text, discuss with your peers about the following questions:1.John Snow believed Idea 2 was right. How did he finally prove it?2. Do you think John Snow would have solved this problem without the map?3. Cholera is a 19th century disease. What disease do you think is similar to cholera today?SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.keys:1. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.2. No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3. SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.Step 6: Consolidate what you have learned by filling in the blanks:John Snow was a well-known _1___ in London in the _2__ century. He wanted to find the _3_____ of cholera in order to help people ___4_____ it. In 1854 when a cholera __5__ London, he began to gather information. He ___6__ on a map ___7___ all the dead people had lived and he found that many people who had ___8____ (drink) the dirty water from the __9____ died. So he decided that the polluted water ___10____ cholera. He suggested that the ___11__ of all water supplies should be _12______ and new methods of dealing with ____13___ water be found. Finally, “King Cholera” was __14_____.Keys: 1. doctor 2. 19th 3.cause 4.infected with 5.hit 6.marked 7.where 8.drunk 9.pump 10.carried 11.source 12.examined 13.polluted 14.defeatedHomework: Retell the text after class and preview its language points
This happens because the dish soap molecules have a strong negative charge, and the milk molecules have a strong positive charge. Like magnets, these molecules are attracted to each other, and so they appear to move around on the plate, taking the food coloring with them, making it look like the colors are quickly moving to escape from the soap.Listening text:? Judy: Oh, I'm so sorry that you were ill and couldn't come with us on our field trip. How are you feeling now? Better?? Bill: Much better, thanks. But how was it?? Judy: Wonderful! I especially liked an area of the museum called Light Games.it was really cool. They had a hall of mirrors where I could see myself reflected thousands of times!? Bill: A hall of mirrors can be a lot of fun. What else did they have?? Judy: Well, they had an experiment where we looked at a blue screen for a while, and then suddenly we could see tiny bright lights moving around on it. You'll never guess what those bright lights were!? Bill: Come on, tell me!? Judy: They were our own blood cells. For some reason, our eyes play tricks on us when we look at a blue screen, and we can see our own blood cells moving around like little lights! But there was another thing I liked better. I stood in front of a white light, and it cast different shadows of me in every color of the rainbow!? Bill: Oh, I wish I had been there. Tell me more!? Judy: Well, they had another area for sound. They had a giant piano keyboard that you could use your feet to play. But then, instead of playing the sounds of a piano, it played the voices of classical singers! Then they had a giant dish, and when you spoke into it, it reflected the sound back and made it louder. You could use it to speak in a whisper to someone 17 meters away.? Bill: It all sounds so cool. I wish I could have gone with you? Judy: I know, but we can go together this weekend. I'd love to go there again!? Bill: That sounds like a great idea!
The grammar of this unit is designed to review noun clauses. Sentences that use nouns in a sentence are called noun clauses. Nominal clauses can act as subject, object, predicate, appositive and other components in compound sentences. According to the above-mentioned different grammatical functions, nominal clauses are divided into subject clause, object clause, predicate clause and appositive clause. In this unit, we will review the three kinds of nominal clauses. Appositive clauses are not required to be mastered in the optional compulsory stage, so they are not involved.1. Guide the students to judge the compound sentences and determine the composition of the clauses in the sentence.2. Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.3. Inspire the students to systematize the function and usage of noun clause1.Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.2.Inspire the students to systematize the function and usage of noun clauseStep1: The teacher ask studetns to find out more nominal clauses from the reading passage and udnerline the nominal clauses.
The newspaper reported more than 100 people had been killed in the thunderstorm.报纸报道说有一百多人在暴风雨中丧生。(2)before、when、by the time、until、after、once等引导的时间状语从句的谓语是一般过去时,以及by、before后面接过去的时间时,主句动作发生在从句的动作或过去的时间之前且表示被动时,要用过去完成时的被动语态。By the time my brother was 10, he had been sent to Italy.我弟弟10岁前就已经被送到意大利了。Tons of rice had been produced by the end of last month. 到上月底已生产了好几吨大米。(3) It was the first/second/last ... time that ...句中that引导的定语从句中,主语与谓语构成被动关系时,要用过去完成时的被动语态。It was the first time that I had seen the night fact to face in one and a half years. 这是我一年半以来第一次亲眼目睹夜晚的景色。(4)在虚拟语气中,条件句表示与过去事实相反,且主语与谓语构成被动关系时,要用过去完成时的被动语态。If I had been instructed by him earlier, I would have finished the task.如果我早一点得到他的指示,我早就完成这项任务了。If I had hurried, I wouldn't have missed the train.如果我快点的话,我就不会误了火车。If you had been at the party, you would have met him. 如果你去了晚会,你就会见到他的。
The discourse explores the link between food and culture from a foreign’s perspective and it records some authentic Chinese food and illustrates the cultural meaning, gerography features and historic tradition that the food reflects. It is aimed to lead students to understand and think about the connection between food and culture. While teaching, the teacher should instruct students to find out the writing order and the writer’s experieces and feelings towards Chinese food and culture.1.Guide the students to read the text, sort out the information and dig out the topic.2.Understand the cultural connotation, regional characteristics and historical tradition of Chinese cuisine3.Understand and explore the relationship between food and people's personality4.Guide the students to use the cohesive words in the text5.Lead students to accurately grasp the real meaning of the information and improve the overall understanding ability by understanding the implied meaning behind the text.1. Enable the Ss to understand the structure and the writing style of the passage well.2. Lead the Ss to understand and think further about the connection between food and geography and local character traits.Step1: Prediction before reading. Before you read, look at the title, and the picture. What do you think this article is about?keys:It is about various culture and cuisine about a place or some countries.
You have no excuse for not going.你没有理由不去。He was punished for not having finished his homework.他因未完成作业而受到惩罚。2.动词ing形式复合结构由物主代词或人称代词宾格、名词所有格或普通格加动词ing,即“sb./sb.'s+doing”构成。动词ing形式的复合结构实际上是给动词ing形式加了一个逻辑主语。动词ing形式的复合结构有四种形式:①形容词性物主代词+动词ing②名词所有格+动词ing③代词宾格+动词ing④名词+动词ingHer coming to help encouraged all of us.她来帮忙鼓舞了我们所有人。The baby was made awake by the door suddenly shutting.这个婴儿被突然的关门声吵醒了。Can you imagine him/Jack cooking at home?你能想象他/杰克在家做饭的样子吗?无生命名词无论是作主语还是作宾语都不能用第②种形式。Tom's winning first prize last year impressed me a lot.汤姆去年得了一等奖使我印象深刻。Do you mind my/me/Jack's/Jack leaving now?你介意我/杰克现在离开吗?Excuse me for my not coming on time.很抱歉我没能按时来。His father's being ill made him worried.他父亲病了,他很担心。We are looking forward to the singer's/the singer to give us a concert.我们盼望着这位歌手来给我们举办一场演唱会。
1.通过对德国鲁尔工业区、我国的辽中南工业区的案例分析和比较,让学生理解传统工业地域形成的主要区位条件和衰落的原因;2.结合鲁尔工业区产生的环境污染等局面,理解工业生产活动对地理环境的影响,并探讨综合整治的措施;3.通过对意大利中部和东北部工业区、美国“硅谷”的案例分析和比较,让学生理解新工业地域形成的主要区位条件和衰落的原因;4.结合新工业地域和地理环境的关系,加深学生对工业生产活动对地理环境的影响的理解。【教学重、难点及解决办法】重点:分析工业区位因素,举例说明工业地域的形成条件与发展特点难点:结合实例说明工业生产活动对地理环境的影响解决方法:比较归纳法 知识迁移应用 案例分析法 自主学习与合作探究 【教学准备】多媒体课件缺勤登记:
③在萨斯索罗地区集聚的相关企业和服务性机构有哪些?④萨斯索罗瓷砖工业小区的生产—销售—服务网络中支撑企业、辅助性企业、服务性企业、服务性机构有哪些?学生回答问题后教师小结:意大利的新工业区,以中小企业集聚的工业小区为独特的发展模式。工业小区的优势是有助于加强专业化,提高生产效率,降低生产成本,增强在市场上的竞争力。完成课本70页活动:1. 比较温州乡镇企业与意大利新工业区的发展有什么异同(相同:有大批廉价劳动力,企业规模小,以轻工业为主,企业生产高度专业化,资本集中程度低。不同:最大的不同是意大利工业小区密切联系协作,共同形成巨型企业,温州虽生产同种产品,但是联系协作不如意,形成多家企业竞争局面,规模效应大减。)2. 温州乡镇企业的发展有哪些些问题?你能为其解决这些问题提出合理化的建议吗?(加大技术投入,企业间联系协作,杜绝恶性竞争等)
2、上海是全国最大的商业中心,上海港是全国最大的港口。商业中心区位选择因素与港口的区位选择因素的共性条件是( )A、自然地理条件B、经济地理条件C、地理位置D、经济腹地3、中国政府宣布开发上海浦东的时间是( )A、1978年B、1985年C、1989年D、1990年4、有关上海优越区位条件的叙述,错误的是( )A、长江三角洲可提供充足的农副产品B、是全国最大的交通枢纽C、是我国最大城市带的核心城市D、是我国面积最大的直辖市5、目前上海市面临的最主要的人口问题是( )A、人口老龄化,青壮年赡养照顾众多老人负担过重B、卫星城镇人口比重大C、人口基数大,自然增长率高D、人口年龄构成轻,生育高峰压力大6、城市问题产生的主要原因是( )A、城市规模扩大B、城市基础设施相对滞后C、城市管理混乱D、城市人口规模和经济规模的迅速扩大7、下列可反映上海市的城市问题的是( )A、上海市区人均道路面积略高于北京市区B、上海市沙尘暴天气多发C、上海市许多家庭三代人同室居住D、上海市人均绿地面积稍高于重庆
教学重点1.自由落体运动的概念及探究自由落体运动的过程。2.掌握自由落体运动规律,并能运用其解决实际问题。教学难点演示实验和探究实验的技巧及自由落体运动规律的得出.教学过程设计思想:1、 先用游戏激发学生学习兴趣,顺理成章地研究落体运动;2、 通过演示实验让学生自己总结出物体下落快慢不同的主要原因是空气阻力,从而猜想若没有空气阻力会怎样;3、 用牛顿管实验验证猜想,引入了新的理想运动模型:自由落体运动。讲述1971年宇航员做的实验,加深印象;4、 了解地球表面物体下落运动近似成自由落体运动的条件;5、 着手研究自由落体运动的规律,利用打点计时器进行研究,得到结论;6、 总结自由落体运动特点及重力加速度;7、 应用训练
猜想:既然物体下落过程中的运动情况与物体质量无关,那么为什么在现实生活中,不同物体的落体运动,下落快慢不同呢?我们能否猜想是由于空气阻力的作用造成的呢?如果没有空气阻力将会怎样呢?学生讨论后回答.三、猜想与假说伽利略认为,自由落体是一种最简单的变速运动.他设想,最简单的变速运动的速度应该是均匀变化的.但是,速度的变化怎样才算均匀呢?他考虑了两种可能:一种是速度的变化对时间来说是均匀的,即经过相等的时间,速度的变化相等;另一种是速度的变化对位移来说是均匀的,即经过相等的位移,速度的变化相等.伽利略假设第一种方式最简单,并把这种运动叫做匀变速运动.四、实验验证实验验证是检验理论正确与否的唯一标准.任何结论和猜想都必须经过实验验证,否则不成理论.猜想或假说只有通过验证才会成为理论.所谓实验验证就是任何人,在理论条件下去操作都能到得实验结果,它具有任意性,但不是无条件的,实验是在一定条件下的验证,而与实际有区别.
一、教材分析在初中阶段,物理量单位的学习是学生较为困惑的问题之一。前面关于1N的规定给学生的印象总好像是有些随意。尤其是牛顿、帕斯卡、安培、伏特、焦耳、瓦特等单位的规定。使得学生感动物理太复杂。事实上,只有把单位制放在整个物理学框架中加以认识,并且知识有了一定的积累。经历了充分的学习过程后才能体会物理量单位的命名和使用规则。体会到其中对一些单位进行规定的合理性和方便特征。物理学单位中,有很少几个基本物理量,它们的单位就是基本单位。在进行了这种选定之后,其它物理量的单位就是根据它的定义式,有所选择的其他物理量的单位共同确定的。国际单位制的建立和使用,不仅方便了国际间的交流,也逐渐成为科学研究中计算和运用的一种规范约束。中学生应该注意学习,逐步习惯,在记录、表达和计算中规范使用。二、教学目标(一)知识与技能1.了解什么是单位制,知道力学中的三个基本单位;2.认识单位制在物理计算中的作用
演示实验1、将一张纸和一张金属片在同一高度同时释放,结果金属片先着地。教师不发表意见,继续做实验。分别将实验内容和实验结果板书在黑板上。2、将刚才的纸片紧紧捏成一团,再次与硬币同时释放,结果两者几乎同时落地。3、将两个完全一样的纸片,一个捏成团,一个平展,则纸团下落快。师:物体下落快慢是由质量决定吗?生:不是的!师:为什么这样说?生:第2个实验和第三实验都说明了这个问题,特别是第3个问题,质量一样却下落有快慢之分。师:那你现在觉得物体下落快慢由什么因素决定呢?生:我想应该是空气阻力。猜想师:如果影响物体下落快慢的因素是空气阻力,那么在没有空气阻力,物体的下落快慢应该是一样的,这种猜想是不是正确呢?我们来做一个实验验证一下。
一、教学目标1、知识与技能(1)知道时间和时刻的含义以及它们的区别。知道在实验室测量时间的方法。(2)知道位移的概念,知道它是表示质点位置变动的物理量,知道它是矢量,可以用有向线段来表示。(3)知道位移和路程的区别。2、过程与方法(1)联系生活实际,通过师生共同讨论的方法来确定时刻与时间、位置、位移及其路程的关系。(2)通过类比的数学方法用数学上的点、线段来突破时刻与时间的关系,直线运动的位置和位移。(3)尝试运用所学的概念判断一些与生活相关的实际问题。3.情感态度与价值观(1)通过本节课的学习,使学生体会到物理现象和规律所蕴含的自然美。(2)通过对问题的讨论,培养学生勇于探究与日常生活有关的物理学问题。(3)培养学生有主动与他人合作的团队精神,提高学生的科学素养。二、教学重点、难点重点:1、时间、时刻、位置、位移的概念。2、矢量与标量的概念。
三、制定实验方案的两个问题:1.怎样测量(或比较)物体的加速度:引导学生思考、讨论并交流。学生可能会提出下面的一些方案:方法一:测出初速度为零的匀加速直线运动的物体在 时间内的位移 ,则 ;方法二:在运动的物体上安装一条打点计时器的纸带,根据纸带上打出的点来测量加速度;方法三:测出两个初速度为零的匀加速运动的物体在相同的时间内发生的位移 、 ,则 ;方法四:测出两个初速度为零的匀加速运动的物体在相同的位移内所用的时间 、 ,则 ;2.怎样提供并测量物体所受的恒力:教师提出:现实中,除了在真空中抛出或落下的物体(仅受重力)外,仅受一个力的物体几乎是不存在的。然而,一个单独的力作用效果与跟它大小、方向都相同的合力的作用效果是相同的,因此,实验中力 的含义指物体所受的合力。以在水平轨道上用绳牵引小车加速运动为例,小车受到四个力的作用,即重力、支持力、绳的拉力和轨道对小车的摩擦力(当物体运动的速度比较小时,我们可以忽略空气的阻力)。
1. 课前观看视频《物理学与人类文明》2. 分组讨论,派代表发言,谈学习感受。主要是物理的地位,物理的学习方法。3. 高中物理与初中物理在内容和方法上的区别高中物理除了现象、概念和规律之外还应该关注研究问题的方法,学会从先想到抽象,从定性到定量研究问题,学会用数学方法解决物理问题,学会实验探究,学会独立分析问题解决问题的思维习惯。4. 高中物理学习的基本要求高中物理学习应该“重视实验,勤于思考”和“经历过程,体验方法”。高中物理学习与初中物理学习虽然有一定区别,但也不是孤立的,要继续坚持初中物理学习中积累的学习方法和体会,重视从正反两个方面加以总结和提炼,做到:(1) 认真阅读,学会自学要学好物理,就要认真阅读课本。阅读课本是要抓住关键词语,弄清语句间的逻辑顺序和因果关系,领会文章段落所表达的物理内容,掌握课本叙述物理问题的表达方法。
四、速度和速率学生阅读教材第18页相应部分的知识点,让学生总结.生:速度既有大小,又有方向,是矢量,速度的大小叫速率,教师引导学生看教材第18页图1.3—2.观察汽车的速度计,讨论后说出你从表盘上获取的有用信息。生:汽车的速率.指针指在相应数字的瞬间,就表示汽车在那一瞬时的速率是那个值.生:还可以从表盘上直接读出公里里程.师:日常生活中的“速度”有时指速度,也有时指速率,要看实际的物理情景。[讨论与交流]甲、乙两位同学用不同的时间围绕操场跑了一圈,都回到了出发点,他们的平均速度相同吗?怎样比较他们运动的快慢?学生讨论,体验平均速度的缺陷,引入平均速率。生1:位移都是零,平均速度等于位移跟发生这段位移所用时间的比值,所以他们的平均速度都是零。生2:即使一位同学站在原地不跑,他的平均速度也是零啊,可我们运动会上不是这样比快慢的,如果这样,那多不公平啊?
①平动的物体一般可以看作质点做平动的物体,由于物体上各点的运动情况相同,可以用一个点代表整个物体的运动,在这种情况下,物体的大小、形状就无关紧要了,可以把整个物体当质点。例如:平直公路上行驶的汽车,车身上各部分的运动情况相同,当我们把汽车作为一个整体来研究它的运动的时候,就可以把汽车当作质点。当然,假如我们需要研究汽车轮胎的运动,由于轮胎上各部分运动情况不相同,那就不能把它看作质点了。要注意的是:同一物体在不同情况下有时可看质点,有时不可以看作质点,一列火车从北京开到上海,研究火车的运行的时间,可将火车看成质点,而火车过桥时,计算火车过桥的时间,不可以将火车看成质点。②有转动但转动为次要因素例如:研究地球公转时,可把地球看作质点;研究地球自转时,不能把地球看作质点。③物体的形状、大小可忽略再如:乒乓球旋转对球的运动的较大的影响,运动员在发球、击球时都要考虑,就不能把乒乓球简单看作质点。
PPT全称是PowerPoint,LFPPT为你提供免费PPT模板下载资源。让你10秒轻松搞定幻灯片制作,打造⾼颜值的丰富演示文稿素材模版合集。