第一章地球的运

2.自球自转一个周期叫1个( )日，地球（）产生昼夜交替，一个昼夜交替的周期叫做一个（）日。沿旋转方向看，晨昏线（圈）的判读：走向光明的为（），走向黑暗的为（）。

发布于 2021-04-24 08:18:15

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Frank 2023-04-24

这家伙很懒，什么也没写！

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奈尔伽姆

Stellar小行星矿业合作社

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