2014考研作文话题预测及范文(五)
以下《》由留学群考研英语作文频道为您独家提供,欢迎大家参考。 Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of thelithosphere, the comparatively rigid outer layer of the Earth thatincludes all the crust and part of the underlying man...