Wheels and Axles (How Toys Work)

Sian Smith 著

出版社：Heinemann

出版时间：2012-08

ISBN：9781432965846

词汇量：135

页数：24

类别：

虚构：非虚构

开本：

阅读年龄：阅读年龄 4-5岁 (50.0%), 9-10岁 (50.0%)

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内容简介

Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines wheels and axles, and uses simple language and labeled photographs to explain the scientific principles behind their use.

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