描述
Ramps are simple machines used for work and play. Workers use them for easy loading and unloading. Skateboarders use them to do tricks. Readers will learn how ramps make work easier and how they are used in everyday life.
書籍詳情
格式
平裝書
頁數
24 頁
語言
英語
已出版
Aug 1, 2009
出版商
Bellwether Media
版本
2 個版本
ISBN-10
1600143466
ISBN-13
9781600143465