书籍详情
格式
Kindle
页数
24
语言
英语
已发布
Jan 1, 2014
出版商
The Child's World
ISBN-10
163143134X
ISBN-13
9781631431340
描述
Readers learn how this simple machine makes it easier to move things from one place to another. They also learn a wheel works with an axle. By the end of the book, readers know the difference between complex and simple machines and how wheels are used in everyday life to make work easier.