earth
于 2010-12-29 发布
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设计卫星绕地球运动的图象。要求:地球的直径≥5cm,卫星用五角星表示,卫星轨迹呈椭圆其中一部分轨迹被地球遮挡。(Design of the satellite around the earth in the image. Requirements: Earth' s diameter ≥ 5cm, with a five-pointed star, said the satellite, the satellite orbit was elliptical orbit by the Earth blocking part.)
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