Wedges

作者:Tomljanovic, Tatiana

页数:24

出版时间:2009-9

价格:$ 10.11

isbn号码:9781605960388

Did you know that there are six simple machines that help make work easier? "Science Matters" is a series of books dedicated to inspiring young readers with a lifelong curiosity about science and the world. Each book introduces a core science topic through visual diagrams, hands-on experiments, and compelling biographies, all written in an engaging way.