专题五1开辟文明交往的航线

5.2.0.0. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. ?世界五大文明中心都分布在大河流域。原因:当时生产力水平低,主要以农业为主, 而农业发展需要水、土等自然条件,大河的中下游多为冲击平原,水、土资源丰富, 利于农业发展。 Evaluation only. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 1 1 开辟新航路的动机和原因: 开辟新航路的动机和原因: 探究探究: :欧洲人在十五、十六世纪热衷于欧洲人在十五、十六世纪热衷于开辟新航路的原因有哪些? 开辟新航路的原因有哪些? 二文明的链接 Evaluation only. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd.