关于此电子书
What’s under your feet as you walk outside? There’s more than just grass and dirt under there! Young readers will learn more about Earth’s layers, from the rocky crust to the dense inner core, in this intriguing book. Color illustrations and photographs, as well as many hands-on activities and projects, provide additional context to ideas such as plate tectonics, early continents, and other topics related to the elementary science curriculum.
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如何阅读
智能手机和平板电脑
笔记本电脑和台式机
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