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教学目的：１．使学生学会观察地球赤道半径与极半径示意图；知道地球的形状、地球的极半径和赤道半径，记住地球的平均半径和赤道周长。２．使学生知道地球仪是地球的模型，知道地轴、两极、纬线和赤道的意义，初步学会在地球仪上识别纬线、两极和赤道。３．使学生知道纬...
Teaching purposes: 1. Let students learn to observe the Earth’s equatorial radius and polar radius diagram; know the shape of the earth, the polar radius of the earth and the equator radius, remember the Earth’s average radius and equator circumference. 2. To make students aware that the globe is a model of the earth and to know the meaning of the axis, poles, parallels, and the equator, it is first learned to identify the weft, the poles, and the equator on the globe. 3. Let the students know the latitude...