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许昌地动仪雕塑价格-艺都雕塑厂家
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地球仪的六大功用 地球仪是地球的模型。它虽然不能象地图那样详细地表示各种地理事物和现象,也不能完全反应地球的实际情况,但是它却可避免地图上存在着长度、方向、面积或形状方面的误差和变形,可以帮助我们阐明许多有关的地球概念,获得地球体的主体概念。
地球仪作为一种教学仪器,可以帮助我们理解和学到许多地理知识。下面分节介绍十种地球仪的功能。
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地球仪上没有长度、面积和方向、形状的变形,所以从地球仪上观察各种景物的相互关系是整体而又近似于正确的。地球是运动的星体,由于它的自转和倾斜地绕太阳公转而形成了种种自然现象,用地球仪作为教具来解释这些自然现象,直观易懂,所以地球仪在坐中、小学的地理教学中是一种必要的办公用品。[1]按用途分类地球仪有以下几种类型:(1)经纬网格地球仪,在它的球面上只有经纬网格以及度数的注记,也称经纬仪。(2)政区地球仪,球面光滑的表示行政区划分的地球仪。(3)地形地球仪,是表示地形的模型,球面可分为平面和立体隆起两种。(4)示意性地球仪,球体仅显示大陆版块及海洋分布情况,常见于装饰。(5)教学地球仪,用于学校及家庭地理教学。(6)工艺礼品地球仪,常用于家庭及办公摆挂件装饰等。
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