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【高中地理必修一课程讲解】地球的历史，包括地层与地质年代表！
必修一课程24/43
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App09:12![[地球奥秘]必修一第一课第二课时：行星地球，同学们可以来学习了](http://p26-sign.bdxiguaimg.com/tos-cn-i-0026/oUEAdmCBTCdAYgpQeDIACFEA63DpZnAEufCRpC~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250220042000D3AB44FE0B4A7E849BF6&requestFrom=704&version_code=80402&x-expires=1771532401&x-signature=D9ntFmWzJnbQ5oJntn1iWQ0g7gU%3D)
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