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Puzzle Calendars 2023 What’s the ratio of the areas of the triangle and the crescent-shaped “lune” formed by two circular arcs? How many non-attacking 阅读全文
posted @ 2024-01-02 19:28
小奔奔
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2024 你好，2024！ 阅读全文
posted @ 2024-01-02 17:26
小奔奔
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posted @ 2024-01-02 16:45
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