作者：PHILIP BROOKS
类别：社交口才电子书
关键词：QUESTIONS
整理日期：2021-12-15 08:15:49
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作品导读
How is a car designed? What keeps a helicopter in the sky? How fast is a bullet train? Which is the biggest ship? How is a submarine kept watertight? If you want to find answers to this questions you must open this book. Have you ever wonde..
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