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Levers

Levers
出版社:Heinemann
詞匯量:852
AR:3.4
虛構(gòu):非虛構(gòu)
ISBN:9781403436627
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圖書介紹

This series offers a clear introduction to simple machines--what they are, what they're made of, and how we use them in today's world. Exciting examples of each machine's applications draw on the world familiar to a child--machines that we use all the time, including some that may be "hidden" in household objects or everyday fixtures. Amazing facts illustrate how we use machines to do tasks that would otherwise be difficult or impossible.
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