2022年奇妙的国际互联网教案4 .pdf

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1、四年级班执教者课 题10 奇妙的国际互联网课 型练习检测课 时1/1 教学目标：1能联系课文内容理解“息息相关、咫尺”等词语，知道课文中引号及某些关联词语的表达作用。2正确、流利地朗读课文。理解课文内容，了解国际互联网的结构和工作原理，感悟、体会其奇妙之处。3认识国际互联网和我们息息相关，激发学生爱科学、用科学的兴趣和情感。重点难点：了解国际互联网的结构和工作原理，感悟、体会其奇妙之处。教学过程教学随笔一、古诗激趣，导入新课1古诗导入：同学们，初唐时期有位诗人叫王勃，他在送别友人的时候写过一首诗，诗中有这样一句脍炙人口的名句出示：海内存知己，天涯若比邻。（齐读）谁能说说这句诗的意思？交流要点：

2、四海之内，如果我们是知心朋友的话，那即使你远在天涯，我也会觉得你就在我的身边。2教师过渡：其实，王勃所说的“天涯若比邻”，只是他对友人的一种劝慰，是一种美好、善良的愿望，实际上在当时一千三百多年前的唐朝是不可能真正做到“天涯若比邻”。然而历史在进步，科技在发展，21 世纪的我们却真真切切地感受到（出示）“虽然对方远在天涯，但是却让人感觉近在咫尺。”3理解句义：读句，交流你有什么发现？交流要点：反义词天涯、咫尺（理解）；转折关联词如果后半句再强调一下，意思就更明确了。4揭示课题：同学们，那到底是什么东西那么奇妙，能让远在天涯的人觉得近在咫尺呢？板书：10 奇妙的国际互联网指导朗读：你想了解国际互

3、联网吗？你想到网上去漫游吗？那就让我们再次读读课题，读出你的好奇，读出你的向往。说明：“入境始于亲”，以一句脍炙人口的名句引入，让学生说说自己的理解，激发学习的兴趣，拉近了学生与文本的距离，与此同时此处学生的期望为学文后对“奇妙的国际互联网”的理解埋下“伏笔”。二、初读课文，整体感知1引导质疑：读了课题，你想对这互联网有哪些了解？生交流：怎样工作？什么样子？有哪些功能与用途？板书学生的疑问：（1）国际互联网是什么样子的？（2）国际互联网是怎样工作的？（3）国际互联网与人类有怎样的关系？2初读课文：带着大家这些疑问，来读读课文，了解文章是怎样介绍这奇妙的互联网的。指名读，正音。说明：在此环节中，

4、学生通过小组间的合作初读课文不仅让孩子在合作中读正确课文，与此同时，让学生们整体了解课文的主要内容，以简单的讲述理清课文的主线，让学生对课文有了整体的感知。三、互动交流，解决疑问（一）体验感悟，解决问题一：国际互联网是什么样子的？1大家不是想知道国际互联网是什么样子的吗？请闭上你的眼睛，静静地听老师描述，想象一下：国际互联网是一张怎样的“网”？师述：你可以想象一下，假如有一只巨型的蜘蛛，织成了一张团团包住整个地球的“大网”，那该是怎样的情景啊！国际互联网就像这张包住地球的“大网”。2听了老师的描述，国际互联网给你最直接的感觉是什么？板书：大3请看课文是怎么描述其“大”的。出示：你可以想象一下，

5、假如有一只巨型的蜘蛛，织成了一张团团包住整个地球的“大网”，那该是怎样的情景啊！国际互联网就像这张包住地球的“大网”。不过，这张“网”是通过无数条“线”把亿万台电脑连接起来的。（1）自由读一读这段文字，想一想：可以从哪些地方体会到国际互文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

6、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

7、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

8、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

9、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

10、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

11、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6联网的“大”？（2）交流。要点：巨型团团包住整个地球无数条亿万台（3）指导朗读：国际互联网看不见，摸不着，团团包住整个地球，

12、是多么神奇啊！你能通过自己的朗读表现出来吗？4也许，细心的同学又有了新的发现这里的“线”也用了引号，这里的引号表示什么呢？出示：这些“线”有的是看得见的电缆、光缆，也有的是看不见的无线电波。（1）指名读这句话，现在你明白这里的“线”指的是什么了吗？（2）其实，这里的“线”上的引号同样表示有特殊含义的意思（出示：表示特殊含义需要强调），而不是我们平时所说的一般的棉线、丝线。5至此，我们对国际互联网的结构有了大致的了解。填空：这里的“网”不是一般的网，而是指（国际互联网）；这里的“线”也不是指普通的棉线丝线，这些“线”有的是看得见的（电缆）、（光缆），也有的是看不见的（无线电波）。说明：本环节的教

13、学是本节课的重点。透过老师的描述，引导学生想象一只巨型的蜘蛛，织成了一张团团包住整个地球的“大网”，通过研读、讨论、朗读和交流，一步一步地将这张虚拟的网呈现在学生面前。（二）品读文本，解决问题二：同学们，国际互联网是怎么工作的呢？1那么，国际互联网又是怎样工作的呢？它又奇妙在什么地方呢？出示：这些“线”上飞速流动着文字、图像、声音，它们能够在几秒钟内跨过万水千山，传到世界各地的电脑上。（1）自由读一读这段文字，你觉得国际互联网奇妙在什么地方？（2）交流。板书：快（3）再读这句话，可以从哪些地方体会到它传播信息的快捷呢？请在有关词语的下面加上小圆点。（4）交流，媒体映示关键词语。2为了使读者相信

14、国际互联网传递信息之“快捷”，课文举了一个怎样的例子来说明？文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 Z

15、J4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1

16、I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 Z

17、J4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1

18、I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 Z

19、J4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1

20、I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6学生交流后出示文字，媒体映示北京发一封信到悉尼的快捷。3指导朗读：利用国际互联网邮递信件，其速度之快，在过去真是令人难以想象的。国际互联网真奇妙啊！谁能把这种奇妙通过朗读传达给听众？过渡：国际互联网的奇妙还远不止这些呢。4出示：我们还可以在网上和亲朋好友通电话，电脑里不仅能传来对方的声音，还能显现他

21、的形象。虽然对方远在天涯，却让人感觉近在咫尺。（1）自由读一读，从中你又能体会到国际互联网奇妙在什么地方？（2）把你的感受跟同桌交流一下。（3）指名交流，说说自己的感受。（4）出示：电脑里不仅能传来对方的声音，还能显现他的形象。电脑里不仅能显现他的形象，还能传来对方的声音。A能否作这样的改动？为什么？点拨：“传来对方的声音”和“显现他的形象”哪一个更能说明国际互联网的“奇妙”？B师：“不仅还”这个关联词，后者表达的意思比前者更进一层。C谁能通过朗读把这种递进的意思表达出来。5想象一下，当你坐在电脑前，在网上和亲朋好友通电话，对方虽然跟你远隔天涯，却让你感觉近在咫尺，那是多么奇妙的一种情形啊！因

22、此，课文中说6、出示：国际互联网似乎把一个庞大的地球都缩小了，我们现在生活的世界真像一个“地球村”。（1）地球表面积达5.1 亿平方千米，但课文中却把它说成是“地球村”，你是怎么理解的？（2）国际互联网使我们地球人如同生活在一个村子里，这让人感到多么奇妙呀！说明：在此环节设计，充分遵循“边读边想、边读边悟”的教学原则，引导学生学生通过自主阅读课文，体会互联网的奇妙之处，从而理解称庞大的地球为“地球村”的重要原因。（三）创设情境，解决问题三：国际互联网与我们人类有什么关系？文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

23、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

24、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

25、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

26、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

27、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档

28、编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4

29、J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z61过渡：既然国际互联网如此奇妙，还是让我们到互联网上看看吧，看看我们可以在网上获得什么呢？2现在老师不是你的老师了，角色变一变，就当一回你们的奶奶吧，行不行？3前几天，我收到悉尼朋友的一封信，看完信，我就拿出信纸，准备写回信。我儿子在一旁就嚷嚷开了：“妈，都什么年代了，干吗不上网，发电子邮件啊？”“年轻人什么都爱赶时髦，什么网不网的，写封信，老朋友照样能收到。孙子、孙女们，是奶奶有道理呢，还是你爸爸有道理啊？（上网发电子邮件只要几秒钟，速度快）4要速度快，成啊。我不写信了，打个电

30、话，也只要几秒钟就能听到老朋友的声音了？（如果你上网，在网上和亲朋好友通电话，不仅能传来对方的声音，还能显现他的形象呢！）5是吗？那可太奇妙了，我还真想看看几十年未见的老朋友如今是什么模样了？我年纪大了，出门诸多不便，我能在国际互联网上看到我最喜欢的京剧吗？我能买到我所需要的日用品吗？俗话说：活到老，学到老。我能在网上学到英语吗？那国际互联网还真是无所不能了，怪不得这篇课文的题目就叫（齐读）。6既然国际互联网那么奇妙，还是让我们到互联网上看看吧，看看我们可以在网上获得什么呢？（齐读第三小节）7作者是从哪几个方面来写国际互联网给我们带来的方便的呢？你从哪个词看出五个方面呢？8那就让我们再次体会一

31、下国际互联网给我们带来的极大的方便。引读：人们可以（这是娱乐）；可以和（这是休闲）；可以和（这是学习）；还可以（这是工作）；甚至可以（这是生活）。9“”说明了什么？（国际互联网还可以为我们做很多事。）10你知道国际互联网还可以为我们做哪些事情呢？（网上会诊、网上交易、网上下棋、网上储蓄）11当然还有很多功能有待于同学们去开发，网络的潜力是无穷无尽的，也许在不久的将来在你们中间也会出现举世瞩目的彼尔盖茨。12国际互联网给我们的学习、工作、生活、娱乐带来了极大的方便，可以这样说，国际互联网和我们有了（引读第四自然段）文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文

32、档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H

33、4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文

34、档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H

35、4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文

36、档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H

37、4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文

38、档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6说明：这部分以学生自组学习为主，教师将运用关联词的训练穿针引线似的巧妙渗透，以引读的方式，串构段落的主要内容，进行语言训练的同时，让互联网与人类生活息息相关的意念深入学生心灵。四、总结全文，拓展延伸。1学了这一课，用一句话谈谈你的收获？2是啊，网络构成了一个新的大千世界，包罗万象。有人说，互联网有百利而无一害，可也有人不这么认为。你们是怎么看待的呢？五、布置作业（任选一题）。1课外阅读：认真阅读网络是什么一文，结合自己的生活实际，写一篇读

39、后感，谈谈自己对国际互联网的认识。2合作探究：“网上商场”是怎么购物的？“电子钱包”又是怎么付款的？（有条件的可以将读后感或研究的结果通过电子邮件发给老师）说明：联系生活感受互联网的重要，将阅读与写作有机结合，注重学生主观感受的表达，内心情感的流露，激发学生爱科学、用科学的兴趣，这一环节实现了情感熏陶与语文实践活动的结合。板书：10 神奇的国际互联网国际互联网是什么样子的？大国际互联网是怎样工作的？快国际互联网与人类有怎样的关系？息息相关教学后记：文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5

40、X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7

41、O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5

42、X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7

43、O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5

44、X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7

45、O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6文档编码:CZ8J1I8H7O6 HN2H4J2U9K5 ZJ4T5X1A3Z6