“走马灯的奥秘”演示课件[语文S版三年级语文上册演示课件].ppt

* 走马灯的奥秘 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 正月15元宵节，民间风俗要挂花灯，走马灯为其中一种。外形多为宫灯状 ，内以剪纸粘一轮 ，将绘好的图案粘贴其上 。燃灯以后 热气上熏 ，纸轮辐转 ，灯屏上即出现人马追逐 、物换景移的影像 。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 我国著名桥梁专家。他主持设计和建造了第一座由中国人自己建设的近代两用大桥——钱塘江大桥，50年代，参加武汉长江大桥的设计并任技术顾问委员会主任，后又主持修撰了《中国古桥技术史》。主要著述有《钱塘江桥》《武汉长江大桥》《茅以升科普创作选集》等。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 学习目标 1、朗读课文，感悟走马灯的奥秘。 2、学习茅以升仔细观察，积极动脑，不懂就问，勇于实践的精神。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 走马灯像磁石一样，把茅以升吸引住了。他仰着头，目不转睛地盯着走马灯。 “像磁石”什么感觉？想象此时茅以升心里、眼里只有什么？ 找出茅以升认真观察走马灯的语句。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 蜡烛点燃以后，轮子就旋转起来，轮子四周的小纸人和小纸马也跟着转动。明亮的烛光把小纸人和小纸马的影子投在灯壁上，十分有趣。 茅以升想到了什么？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 他越看越入迷。一连串的问题，争着往他脑子里挤。 联系课文想想下面的词语用的好不好。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 小纸人、小纸马怎么会转？ 怎么有时转得快，有时转得慢呢？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 那么怎样才能让小纸人、小纸马跑得快一些呢？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 热气大，小纸人、小纸马就跑得快。 你知道什么情况下小纸人、小纸马跑快？ Evaluation only. Created with Aspos