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![High School Earth Science - Wikibooks, open books for an open world](https://www.iarticlesnet.com/pub/img/site/s_25.jpeg)
High School Earth Science - Wikibooks, open books for an open world
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日期:2024-09-04
This book was originally developed by the CK-12 Foundation, a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 ......看更多