Concrete Mixers (Blastoff! Readers: Mighty Machines) (Blastoff Readers. Level 1)

Ray McClellan（Author）

出版社：Bellwether Media

出版时间：2006-08

ISBN：9781600140440

词汇量：

页数：24

类别：

虚构：虚构

开本：

阅读年龄：阅读年龄 3-4岁 (50.0%), 4-5岁 (50.0%)

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内容简介

Have you ever wanted to leave your handprint in a patch of wet concrete? You may have wondered how concrete is formed and how it is set down to harden. This introduction offers a glimpse into this process and the giant machine behind it.

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