Using Ramps and Wedges
頁數(shù):32
詞匯量:2067
AR:4.7
虛構(gòu):非虛構(gòu)
ISBN:9781410914477
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圖書介紹
A ramp is a simple machine that makes it easier for us to move things. A ramp has a bigger distance along the slope than it has along the vertical distance. Find out all about this simple machine in this title.
A ramp is a simple machine that makes it easier for us to move things. A ramp has a bigger distance along the slope than it has along the vertical distance. Find out all about this simple machine in this title.
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