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220516-期末考试(地球自转的规律)-10190412

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20220516-水土流失的原因-10190347

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密码保护:20220516 构造地貌的形成—褶皱 10190336

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220517-10190339-水土流失的自然原因

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220517-地球自转的影响-10190219

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20220516-褶皱的形成与特点-10190244

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20220516-地球仪演示课-10190125

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20220516-褶皱的形成与特点-10190315

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20220516-地球自转的地理意义-10190215

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20220516-地球的自转-10190343

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