下沉岩石圈板块

The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(

发表于:2018-12-01 / 阅读(139) / 评论(0) 分类 新东方背诵文选

The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(n.[地]岩石圈)is divided into a few dozen plates o

发表于:2018-12-08 / 阅读(392) / 评论(0) 分类 新概念优美背诵短文50篇

The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(n.[ 地 ] 岩石圈 )is divided into a few dozen p

发表于:2018-12-30 / 阅读(76) / 评论(0) 分类 考研背诵50篇

Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the

发表于:2019-01-08 / 阅读(56) / 评论(0) 分类 Scientific American(十一)月

对于备考新TOFEL考生来说,首先最大的挑战和最大的难点就是单词很难记,而且容易忘,由于记不住单词而英语学习效率非常低,学英语时间拖的就比较长,所以,学习一长就没有兴趣了;一准

发表于:2019-02-03 / 阅读(18) / 评论(0) 分类 实用英语

Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle.The lithosphere is divided

发表于:2019-02-25 / 阅读(47) / 评论(0) 分类 双语有声阅读