描述
Do you know what a lever is? How can a lever help you? Through simple experiments and clear explanations, understand how this simple machine functions and how it can make the work that you do easier.
书籍详情
格式
电子书
页数
47 页
语言
英语
已发布
Aug 23, 2011
出版商
Lerner Publishing Group
版本
3 editions
ISBN-10
1281280836
ISBN-13
9781281280831