Light and Sound pdf epub mobi txt 電子書下載2025

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出版者:

作者:Goldsmith, Mike

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頁數:48

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出版時間:2009-3

價格:$ 7.90

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isbn號碼:9780753462812

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Although they are all around us, light and sound are very difficult to explain to young children. Now readers can join an expert to uncover what light and sound are, how they are generated, and how a reader's own eyes and ears work. Simple hands-on projects round out this introduction to an essential scientific subject.