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发表于2024-11-09
Changing Sounds pdf epub mobi txt 电子书 下载 2024
How do batteries work? Why do people sweat when they are hot? What makes things fall to the ground? This series answers all of these questions and more through factual information and practical investigation, including diagrams and data to help interpret results. Each book includes study questions and a "Can you remember the essentials?" summary.
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Changing Sounds pdf epub mobi txt 电子书 下载 2024