正在加载图片...
I Information related to the text 1) the Ice age An ice age is a period in the earths history when moving sheets of ice covered large regions ofthe world's land sarface Earth scientists believe that there have been several ice ages the earliesykibwice age occurred about 700 milion years ago, rand the most recent one, usually referred to as the ice age or the pleistocene lce ageⅠ. Information related to the text 1) the Ice age An ice age is a period in the earth’s history when moving sheets of ice covered large regions of the world’s land surface. Earth scientists believe that there have been several ice ages. The earliest known ice age occurred about 700 million years ago, and the most recent one, usually referred to as the Ice Age or the Pleistocene Ice Age
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有