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发表于2024-11-30
Science Experiments and Amusements for Children pdf epub mobi txt 电子书 下载 2024
73 easy experiments, requiring only materials found at home or easily available, such as candles, coins, steel wool, etc.; illustrate basic phenomena like vacuum, simple chemical reactions, etc. All safe. Modern, well-planned. Unabridged republication of the original (1963) edition.
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Science Experiments and Amusements for Children pdf epub mobi txt 电子书 下载 2024