An understanding of how Earth's oceans were formed must begin with an examination of how our solar system developed. Scientists believe our solar system began forming as a huge cloud of dust that collapsed to form a sun surrounded by a flat disk of particles rotating around it, This disk-th...
今天阅读三篇文章是:Habitat Selection by Birds (鸟类的栖息地选择),Transportation and American Development (交通和美国的发展),和How Earth’s Oceans Formed (地球海洋如何形成)。 托福阅读第1篇话题重复2014.05.17 Habitat Selection和2013.03.30 Habitat Selection of Animals;第2篇话题重复2016.08.27 Impact of...
In 1912, the German geologist Alfred Wegener proposed that Earth’s continents are mobile rafts of lighter crust that have shifted over time by plowing their way through the denser crust of the oceans.The theory, called continental drift, was partly motivated by the apparent fit, like puzzle pi...