提供各类精美PPT模板下载
当前位置:首页 > Word文档 >

人教版高中地理选修2百万移民及其安置教案

  • 人教版新课标小学数学四年级下册将较大数改写成用万或亿作单位的数说课稿2篇

    一、说教材该内容是人教版小学数学四年级第八册第四单元的最后一个内容,是在学生已经掌握了把整万、整亿数改写成用万或亿作单位的数的基础上进行教学的。通过本节课的学习,要使学生能通过独立思考、合作交流,掌握把大数目改写成用“万”或“亿”作单位的数的方法,为以后能准确、恰当地运用数目描述生活现象打下良好的基础。根据本课的内容和学生已有的知识和心理特征,我制订如下教学目标:1、掌握把较大数改写成用“万”或“亿”作单位的数的方法,并能根据要求保留一定的小数位数。2、经历将一个数改写成用“万”或“亿”作单位的数的过程,体验数据记法的多样性。3、感受数学知识的应用性。理解和掌握把较大的数改写成用“万”或“亿”作单位的小数的方法是本课的教学重点。位数不够用0补足是本节课的难点。

  • 古诗词诵读《拟行路难(其四)》说课稿 2021-2022学年统编版高中语文选择性必修下册

    (一)导入新课“时势造英雄”,恶劣的环境造就名诗名篇。正因如此,怀才不遇于古人是恒久的情感素材。同学们,请大家回忆我们学过哪些抒发作者怀才不遇的诗词?(二)解释题意拟:仿照,模拟《行路难》,是乐府杂曲,本为汉代歌谣,晋人袁山松改变其音调,创制新词,流行一时。 鲍照《拟行路难》共十八首,歌咏人世的种种忧虑,寄寓悲愤,今天我们学习的是其中第四首。(三)作者简介、写作背景门阀制度之下,“上品无寒门,下品无世族”,出身寒微的文人往往空怀一腔热忱,却报国无门,不得不在壮志未酬的遗恨中坐视时光流逝。即使跻身仕途,也多是充当幕僚、府掾,备受压抑,在困顿坎坷中徒然挣扎,只落得身心交瘁。

  • 人教版高中政治必修2国际社会的主要成员-主权国家和国际组织说课稿

    【教师总结:联合国的会徽的世界地图象征着联合国是一个世界性的国际组织;图案中得橄榄枝象征着和平。联合国采取了很多措施以实现它的宗旨,如对于朝鲜违反国际法规进行核试验,联合国给予警告和制裁,充分体现了它维护国际和平与安全,促进国际合作与发展的宗旨。】对于中国与联合国的关系这部分内容,我将请阅读教材92页几幅图片及材料内容,设置活动探究课中国在联合国的声音和身影,请合作讨论思考以下两个问题,中国与联合国的关系;列举事实说明中国在国际社会中的重要作用。 教师通过剖析中国在联合国的地位和作用,引导学生理解中国在国际社会中发挥着重要作用,是负责任的国家;同时培养学生综合运用知识分析说明问题的能力,使学生感受作为中国人的自豪。【教师总结:中国是联合国的创始国之一,中国作为联合国的创始国和安理会常任理事国之一,一贯遵循联合国宪章的宗旨和原则,积极参与联合国及其专门机构有利于世界和平和发展的活动。】

  • 人教版高中历史必修2战后资本主义世界经济体系的形成说课稿3篇

    1、《战后资本主义世界经济体系的形成》是人教版高中历史必修Ⅱ第八单元第22课,学时为1课时。《历史必修Ⅱ》一书用古今贯通、中外关联的八个专题来着重反映人类社会经济和社会生活领域发展进程中的重要史实。从第一单元勾勒“古代中国经济的基本结构与特点”再到第八单元“世界经济的全球化趋势”,以历史唯物主义观点清晰阐明经济全球化是世界生产力发展的要求和结果,是不以人的意志为转移的历史必然趋势。第八单元的标题是《世界经济的全球化趋势》,作为最后一单元,从内容上讲,有强烈的时代感和现实意义,是全书内容的总结与升华展望。提起“全球化”这个十年前才首次出现在美国《商业周刊》的新名词,如今却是地球人都知道了。然而究竟什么是全球化?作为一历史现象,全球化有其自身内部严密完整的体系,其中核心之一便是制度、规则的全球化,而这正是本课内容的着力点。

  • 高中历史人教版必修一《第2课秦朝中央集权制度的形成》说课稿

    【课件展示】《秦朝中央集权制度的建立》《教材简析》《教学目标》《教法简介》《教学过程设计及特色简述》【师】本节内容以秦代政治体制和官僚系统的建立为核心内容,主要包括秦朝中央集权制的建立的背景、建立过程及影响。本节内容在整个单元中起到承前启后的作用,在整个模块中也有相当重要的地位。让学生了解中国古代中央集权政治体制的初建对于理解我国古代政治制度的发展乃至我们今天的政治体制是十分必要的。 本堂课我采用多媒体和讲授法及历史辩论法相结合,通过巧妙设计问题情境,调动学生的学习积极性,使学生主动学习,探究思考。教师引导和组织学生采取小组讨论、情景体验等方式,达到教学目标。 本节内容分三个部分,下面首先看秦朝中央集权制度建立的前提即秦的统一

  • 人教版高中历史必修3现代中国教育的发展说课稿

    一、教材分析下面我来谈一谈对教材的认识:主要从教材的地位和作用、以及在此基础上确立的教学目标、教学重难点这三个方面来谈。首先,来谈教材的地位和作用:本课教材内容主要从三个方面向学生介绍了现代中国教育的发展状况和趋势:人民教育的奠基、动乱中的教育和教育的复兴,全面讲述了新中国教育的三个阶段。本课是文化史中中国史部分的最后一课, 也是必修三册书中唯一涉及教育的一课。而教育是思想文化史中的重要组成部分,江泽民同志在谈到教育的时候曾经说过,“百年大计,教育为本。教育为本,在于育人”。教育是关系国计民生的大事。学生通过学习新中国教育发展的史实,理解“科教兴国”、“国运兴衰,系于教育”的深刻含义。最终由此激发学生树立“知识改变命运、读书成就人生”的信念,树立勤奋学习、成人成才、报效祖国、服务社会的崇高理想。故本课的教学有极大的现实意义。谈完了教材的地位和作用,我再分析一下教学目标:

  • 人教版新课标小学数学六年级上册百分数和分数、小数的互化说课稿2篇

    二、以人为本,说策略。《数学课程标准》指出:“数学教学要紧密联系学生的生活实际,从学生的生活经验和已有的知识出发……”因此,结合本课教材特点、学生实际情况,我采取小组合作学习,引导学生应用学过的分数、小数互化的知识进行迁移、类推,学习新知识。同时,让学生在尝试探究的积极活动中获取新知,发展能力。三、以探为主,说流程。课堂教学是学生数学知识的获得、技能技巧的形成、智力、能力的发展以及思想品德的养成的主要途径。为了达到预期的教学目标,我对整个教学过程进行了系统地规划,遵循目标性、整体性、启发性、主体性等一系列原则进行教学设计。设计了以下几个主要的教学程序:(一)设疑激趣,引入课题。“兴趣是最好的老师”,为了激发学生的学习兴趣,课一开始,我设计了一个童话故事,在故事中设计了帮助主人公比较2/5、42%、0.45的问题,然后引出课题。

  • 高中历史人教版必修二《第2课古代手工业的进步》说课稿

    二、教学目标:1、知识与能力(1)了解我国古代冶金、制瓷、丝织业发展的基本情况;(2)了解中国古代手工业享誉世界的史实,培养学生的民族自信心。2、过程与方法(1)通过大量的历史图片,指导学生欣赏一些精湛的手工业艺术品,提高学生探究古代手工业的兴趣;(2)运用历史材料引导学生归纳古代手工业产品的基本特征。3、情感态度与价值观:通过本课教学,使学生充分地感受到我国古代人民的聪明与才智,认识到古代许多手工业品具有较高的艺术价值,以及在世界上的领先地位和对世界文明的影响,增强民族自豪感。

  • 关于医院地震紧急处置预案精选范文

    一)建(构)筑物达到当地抗震设防要求的,可引导就诊人员就近躲避在避险缓冲区、内承重墙的墙根、墙角以及桌椅、病床下面和坚固物体旁边。  (二)建(构)筑物未达到当地抗震设防要求的可按下列方法引导避险:  1.引导所处位置不超过二层且能行动的人员迅速撤离到室外安全地方;视具体情况帮助所处位置不超过二层且具有限行动能力的人员撤离到室外安全地方;  2.引导帮助所处位置超过二层和不能迅速撤离到室外安全地方的人员,就近躲避在避险缓冲区、内承重墙的墙根、墙角以及桌椅、病床和坚固物体旁边。

  • 部编人教版六年级下册《真理诞生于一百个问号之后》说课稿(二)

    一、说教材分析《真理诞生于一百个问号之后》是第五单元的一篇精读课文,也是一篇议论文。文题“真理诞生于一百个问号之后”也是课文的主要观点。全文结构清晰:第1自然段开门见山,提出观点,明确指出:“真理诞生于一百个问号之后”本身就是“真理”。主体部分(2—8自然段)引用科学发展史上的三个有代表性的事例(谢皮罗教授从洗澡水的漩涡中发现问题,通过反复试验和研究,发现水的漩涡的旋转方向和地球的自转有关;德国地质学家魏格纳从蚯蚓的分布,推论地球上大陆与海洋的形成;奥地利医生从儿子做梦时眼珠转动这个现象,经过反复观察和分析,推断出凡睡者眼珠转动时都表示在做梦),论述了只要善于观察,不断发问,不断解决疑问,锲而不舍地追根求源,就能在现实生活中发现真理。第三部分(9、10自然段)总结全文,重申观点。指出科学并不神秘,也不遥远,关键在于“知微见著”,不断探索,善于独立思考,具有锲而不舍的精神。

  • 部编人教版六年级下册《真理诞生于一百个问号之后》说课稿(一)

    一、说教材《真理诞生于一百个问号之后》是统编语文小学六年级下册第五单元中的一篇精读课文,属于议论文。课文的题目也是课文的主要观点。课文用三个具体确凿的事例论述了只要善于观察,不断发问,不断解决疑问,锲而不舍地追根求源,就能在现实生活中发现真理。 选编这篇课文的意图,一是让学生了解科学家发现的一般规律——真理诞生于一百个问号之后,从中感受到,领悟到:见微知著,独立思考,锲而不舍,不断探索的科学精神。二是学习课文用具体典型的事例说明观点的写作方法了解议论文的形式。二、说教学目标1.会写“域、惯”等12个字,会写“真理、领域”等词语。 2.能联系上下文理解含义深刻的句子。能仿照课文的写法写一段话,用具体事实说明一个观点。 3.理解三个关于科学发现的故事,能从具体事例中正确理解“真理诞生于一百个问号之后”的含义。

  • 新人教版高中英语必修3Unit 1 Festivals and Celebrations-Reading for writing教学设计二

    Step 3 Analyzing article structureActivity 31. Teachers raise questions to guide students to analyze the chapter structure of this diary and think about how to describe the festival experience. (1)What should be included in the opening/body/closing paragraph(s)?(2)How did the writer arrange his/her ideas?(3)What kind of interesting details did the writer describe?(4)How did the writer describe his/her feelings/emotions during the event?2. Students read and compare the three sentence patterns in activity 2. Try to rewrite the first paragraph of the diary with these three sentence patterns. After that, students exchange corrections with their partners. Such as:●This was my first time spending three days experiencing the Naadam Festival in China’s Inner Mongolia Autonomous Region and it was an enjoyable and exciting experience. ●I'll never forget my experience at the Naadam Festival because it was my first time to watch the exciting Mongolian games of horse racing, wrestling, and archery so closely. ●I'll always remember my first experience at the Naadam Festival in China’s Inner Mongolia Autonomous Region because it was so amazing to spend three days witnessing a grand Mongolian ceremony. Step 4 Accumulation of statementsActivity 41. Ask the students to read the diary again. Look for sentences that express feelings and emotions, especially those with the -ing form and the past participle. Such as:● …horse racing, wrestling, and archery, which are all so exciting to watch. ● some amazing performances● I was surprised to see…● I was a little worried about. . . ● feeling really tiredOther emotional statements:●I absolutely enjoyed the archery, too, but the horse races were my favourite part. ●I'm finally back home now, feeling really tired, but celebrating Naadam with my friend was totally worth it. ●He invited me back for the winter to stay in a traditional Mongolian tent and cat hot pot. I can’t wait!2. In addition to the use of the -ing form and the past participle, the teacher should guide the students in the appreciation of these statements, ask them to memorize them, and encourage them to use them reasonably in writing practice.

  • 新人教版高中英语必修3Unit 4 Space Exploration-Discovering Useful Structure教学设计

    The theme of the section is “Describe space facts and efforts to explore space”. Infinitives are one of non-finite verbs, as the subjects, objects, predicative, attributes and adverbials. This unit is about space exploration, which is a significant scientific activity, so every scientific activity has strong planning. Therefore, using the infinitives to show its purpose, explanations or restrictions is the best choice.1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use infinitives in oral and writing English. 1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use use infinitives in oral and writing English.Step 1 Lead in---Pair workLook at the following sentences and focus on the italicized infinitives. In pairs, discuss their functions. 1. I trained for a long time to fly airplanes as a fighter pilot..(作目的状语)2. As we all know, an astronaut needs to be healthy and calm in order to work in space..(作目的状语)3. First of all, you must be intelligent enough to get a related college degree..(作目的状语)4. Some scientist were determined to help humans realise their dream to explore space..(作定语)5. On 12 April 1961, Yuri Gagarin became the first person in the world to go into space..(作定语)Summary:1. 不定式的结构:to+do原形。2. 分析上面的句子,我们知道在描述太空探索时,动词不定式不仅可以用来表目的,还可以用来作定语,表修饰。

  • 新人教版高中英语必修3Unit 1 Festivals and celebrations-Discovering Useful Structure教学设计

    4.That was an experience that frightened everyone. →That was _____________________. 答案:1. taking 2. being discussed 3. in the reading room 4. a frightening experienceStep 6 The meaning and function of V-ing as the predicative动词-ing形式作表语,它通常位于系动词后面,用以说明主语“是什么”或“怎么样”一种表示主语的特质、特征和状态, 其作用相当于形容词; 另一种具体说明主语的内容, 即主语等同于表语, 两者可互换。The music they are playing sounds so exciting. 他们演奏的音乐听起来令人激动。The result is disappointing. 结果令人失望。Our job is playing all kinds of music. 我们的工作就是演奏各种音乐。Seeing is believing. 眼见为实。Step 7 Practice1. It is ________(amaze) that the boy is able to solve the problem so quickly.2. Buying a car is simply _______(waste) money. 3. Please stop making the noise—it’s getting ________(annoy). 4. complete the passage with the appropriate -ing form.La Tomatina is a festival that takes place in the Spanish town Bunol every August. I think many food festivals are __________ because people are just eating. however, this festival is _________ because people don't actually eat the tomatoes. Instead, they throw them at each other! the number of people ________ part in this tomato fight, can reach up to 20,000, and it is a very __________ fight that lasts for a whole hour. The _______ thing is how clean Bunol is after the tomatoes are washed away after the fight. this is because the juice form tomatoes is really good for making surfaces clean!答案:1. amazing 2. wasting 3. annoying4. boring interesting taking exciting amazing

  • 新人教版高中英语必修3Unit 1 Festivals and Celebrations-Reading and Thinking教学设计

    The topic of this part is “Discover the reasons for festivals and celebrations.The Listening & Speaking & Talking part aims at talking about the experiences and feelings or emotions about the festivals and celebrations. This section aims at detecting the reason why the people celebrate the festivals, the time, the places, the types and the way of celebrations. It also explains why some traditions in the old celebrations are disappearing, like the firecrackers in the big cities and some new things are appearing like the prosperity of business or commerce. 1. Students can talk about what festivals they know and the reasons and the way of celebrating them.2. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.3. Students can understand the past, the present situation of some festival around the world and why there are some changes about them. 4. Students can have the international awareness about the festivals.1. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.2. Students can understand the past, the present situation of some festival around the world and why there are some changes about them.Step 1 Lead in---Small talkWhat festival do you like best ? Why ?I like the Spring Festivals because I can set off the fireworks, receive the lucky money and enjoy the Gala with my families.Step 2 Before reading---Pair workWhy do people celebrate different festivals ?The Spring Festivals is to celebrate the end of winter and the coming of spring and new life.The Mid-autumn Day is to celebrate the harvest and admire the moon.

  • 新人教版高中英语必修3Unit 1 Festivals and Celebrations-Listening &Speaking&Talking教学设计

    The theme of this section is “Talk about festival activities and festival experiences”.Festival and holiday is a relaxing and interesting topic for students. This part talks about the topic from the daily life of students’. In the part A ---Listening and Speaking, there are three conversations among different speakers from three countries(Japan, Rio and China), where the speakers are participating in or going to participate in the festivals and celebrations. So listening for the relationship among them is a fundamental task. Actually, with the globalization and more international communication, it is normal for Chinese or foreigners to witness different festivals and celebrations in or out of China. In the Conversation 1, a foreign reporter is interviewing a Japanese young girl who just had participated in the ceremony of the Coming-of-Age Day on the street and asking her feeling about the ceremony and the afterwards activities. Conversation 2, Chinese girl Li Mei is witnessing the Rio Carnival for the first time, and her friend Carla gives her some advice on the costumes which enables her to match with the carnival to have a good time. Conversation 3, a Chinese guide is showing a group of foreign visitors around the Lantern Festival and introducing the customs of the festival to them. The three conversations have a strong vitality and insert the festival and cultural elements from different countries. So perceiving the festivals and cultures from different countries is the second task. At the same time, the scripts also insert the targeted grammar --- v-ing as attributive and predicative, which students can perceive and experience in a real context and make a road for the further study. That is the third task. In the Part B--- Listening and Talking, the theme is “Talk about festival experience”, which is the common topic in our daily conversations. During the conversation, Song Lin, a Chinese student, asked Canadian friend Max about how to spend Christmas. In the conversation, Song Lin talked about experience and the feelings during the Chinese Spring Festival, during which there are not only some enjoyable things but some unpleasant things. After the listening, perhaps students find there are some similarities between Christmas and the Chinese Spring Festival as there are some differences in the origins and celebrations. For example, people always visit friends and relatives, decorate their houses, have a big dinner together, chat and give presents to each other.

  • 新人教版高中英语必修3Unit 1 Festivals and Celebrations-Reading for Writing教学设计一

    The topic of this part is “Write about your festival experience”.During the Listening and Speaking and Talking, students are just asked to say out their festival experiences such as the Spring Festival, Mid-autumn Day, but this part students will be asked to write down their own festival experiences. During the reading part, it introduces the Naadam Festival in Inner Mongolia Autonomous Region, which can give students a good example to imitate. Students not only learn the festival, but touch and feel the Inner Mongolian’s character, the spirit and cultural atmosphere, which can help students form the cultural awareness and learn to enjoy and value the diversity of Chinese culture.Concretely, the dairy tells the experience that the author spent the Naadam Festival in Inner Mongolia Autonomous Region with his/her friend. The structure is clear. In the opening paragraph, it introduces the topic of the Naadam Festival and the whole feeling. Then it introduces the items of the festival like the ceremony, wrestling and horse racing. Finally, it summarizes this experience. Because this part is a travel journal, we must guide students pay more attention to these details: 1. use the first person. 2. use the past tense to tell the past thing and use the present or future tense to describe the scenery. 3. use the timeline to tell the development. 4. be careful for the author’s psychology, emotion and feeling, etc.1. Read quickly to get main idea; read carefully to get the detailed information about Naadam Festival.2. Learn the structure of the reading article and language.3. Write an article about a festival experience4. Learn to use the psychology, emotions and feeling in the writing.1. Write an article about a festival experience.2. Use the structure of the reading article and language.

  • 新人教版高中英语必修3Unit 3 Diverse Cultures-Discovering Useful Structure教学设计

    Step 4 PracticeRead the conversation. Find out which words have been left out.Justin: Linlin, I’m going to Guizhou Province next month. I’m super excited! Any recommendations for places to visit?Linlin: Wow, cool! Guizhou is a province with a lot of cultural diversity. Places to visit...well, definitely the Huangguoshu Waterfall first.Justin: What’s special about the waterfall?Linlin: Well, have you ever heard of the Chinese novel Journey to the West ?Justin: Yes, I have. Why ?Linlin: In the back of the waterfall, you will find a cave, which is the home of the Monkey King.Justin: Really? Cool! I’ll definitely check it out.Linlin:And I strongly recommend the ethnic minority villages. You’ll find Chinese culture is much more diverse than you thought.Justin:Sounds great, thanks.Answers:Justin: Linlin, I’m going to Guizhou Province next month. I’m super excited! Do you have any recommendations for places to visit?Linlin: Wow, that’s cool! Guizhou is a province with a lot of cultural diversity. What are some places to visit in Guizhou ? Well, definitely the Huangguoshu Waterfall is the first place to visit in Guizhou Province.Justin: What’s special about the waterfall?Linlin: Well, have you ever heard of the Chinese novel Journey to the West ?Justin: Yes, I have heard of the Chinese novel Journey to the West . Why do you ask if I have heard of the Chinese novel Journey to the West?Linlin: In the back of the waterfall, you will find a cave, which is the home of the Monkey King from Journey to the West.Justin: That’s really true? It’s Cool! I’ll definitely check it out.Linlin:And I strongly recommend the ethnic minority villages on your trip to Guizhou Province. You’ll find Chinese culture is much more diverse than you thought it was.Justin:This all sounds great, thanks.

  • 新人教版高中英语必修3Unit 3 Diverse Cultures-Reading for Writing教学设计

    The topic of this part is “Describe a place with distinctive cultural identity”.This section focuses on Chinese culture by introducing Chinatown, whose purpose is to show the relationship between the Chinese culture and American culture. The Chinese culture in Chinatown is an important part of American culture. Chinatown is an important window of spreading Chinese culture and the spirit homeland of oversea Chinese, where foreigners can experience Chinese culture by themselves.Concretely, the title is “Welcome to Chinatown!”, from which we can know that the article aims at introducing Chinatown. The author used the “Introduction--Body Paragraph--Conclusion” to describe the people, language, architecture, business, famous food and drinks and people’s activities, which can be a centre for Chinese culture and shows its unique charm.1. Read quickly to get main idea; read carefully to get the detailed information.2. Learn the characteristics of writing and language.3. Learn to introduce your own town according to the text.4. Learn to correct others’ writing.1. Learn the characteristics of writing and language.2. Learn to introduce your own town according to the text.Step 1 Lead in ---Small talkIn the reading part, we mentioned the Chinatown of San Francisco. How much do you know about Chinatown of San Francisco ?Chinatown is a main living place for Chinese immigrants, where you can see many Chinese-style buildings, costumes, operas, restaurants, music and even hear Chinese.Step 2 Before reading ---Predict the contentWhat is the writer’s purpose of writing this text ? How do you know ?From the title(Welcome to Chinatown) and some key words from the text(tourist, visit, visitors, experience), we can know the purpose of the text is to introduce Chinatown and show the relationship between Chinese culture and American culture.

  • 新人教版高中英语必修3Unit 3 Diverse Cultures-Listening &Speaking&Talking教学设计

    1. In Picture 1 and Picture 2, where do you think they are from? How do you know?From their wearings, we can know they are from ethnic minority of China--- Miao and Dong.Picture 1, they are playing their traditional instrument lusheng in their traditional costumes.Picture 2. the girls are Miao because they wear their traditional costumes and silver accessory.2. In Picture 3, can you find which village it is? What time is it in the picture?It is Dong village. It is at night. Step 2 While-listeningJustin met a new friend while traveling in Guizhou. Listen to their conversation and complete the summaries below.Part 1Justin and Wu Yue watched some Miao people play the lusheng. The instrument has a history of over 3,000 years and it is even mentioned in the oldest collection of Chinese poetry. Then they watched the lusheng dance. Justin wanted to buy some hand-made silver/traditional accessories as souvenirs. He was told that the price will depend on the percentage of silver. Part 2They will go to a pretty Dong minority village called Zhaoxing. they will see the drum towers and the wind and rain bridges. They may also see a performance of the Grand Song of the Dong people.Step 3 Post-listening---TalkingWork in groups. Imagine Justin is telling some friends about his trip to Guizhou. One of you is Justin and the rest of you are his friends. Ask Justin questions about his trip and experience. The following expressions may help you.

上一页123...219220221222223224225226227228229230下一页
提供各类高质量Word文档下载,PPT模板下载,PPT背景图片下载,免费ppt模板下载,ppt特效动画,PPT模板免费下载,专注素材下载!