加载页面出错。
请尝试刷新本页面。如果仍然不行,则可能是网络问题,请使用我们的自测网页查找页面加载受阻的原因。
详细了解可能的网络问题联系支持部获取更多帮助。

Experiment with Rocks

Sophie Lockwood创作
电子书
Describes experiments that can be performed using rocks to demonstrate their properties, including how they are formed, how to test their hardness, and whether rock layers can be changed by events such as earthquakes.

格式

  • OverDrive Read
  • PDF电子书

语言

  • 英语

级别

  • Lexile® 蓝思阅读分级:540
  • 文字难度:2-3