How Are Caves Formed? (Bookworms: Nature's Formations)
B. J. Best(Author)
出版社:Cavendish Square
出版时间:2017-08
ISBN:9781502625342
词汇量:
页数:24
类别:
虚构:非虚构
开本:
阅读年龄:阅读年龄 7-8岁 (100.0%)
Describes how caves are formed by the acidic action of water on limestone bedrock.