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小学自然第五册有关课文从反映天体运动的一些表面现象入手,引导学生展开空间想象,应用推理的方法揭示出天体运动的本质。 假定我们站在北半球上面向太阳,根据习惯左边为东,右边为西(以下均按这种假定来观察和叙述)。早上看到太阳从左边(东)地平
The texts of the fifth volume of primary school naturally start from some surface phenomena that reflect celestial movement, guide students to start their imagination in space and reveal the essence of celestial movement by applying reasoning. Suppose we stand on the northern hemisphere facing the sun, according to the habit of the east on the left and the west on the right (all are observed and described below). In the morning I saw the sun from the left (east) horizon