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21st Century

Stephanie Paris

出版社：Teacher Created Materials

出版时间：2013-01

ISBN：9781433349003

词汇量：4996

页数：64

类别：

虚构：非虚构

开本：

阅读年龄：

作者简介

内容简介

This nonfiction title gives readers a look into space exploration. Discover galaxies, comets, asteroids, constellations, the effect gravity has on the inner and outer planets, and what measures scientists are taking to learn more about space.

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