How was the Grand Canyon formed The truth is that no one knows for sure though there are some pretty good guesses, and it is usually thought that a number of processes combined to create the views that you see in today’s Grand Canyon. The most powerful force to have an impact on the...
从文章第一段的句子:Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years.可知,一些证据表明深深的峡谷据相信是由于几百万年的河流冲刷造成的,故选B。 (2)题详解: ...
How was the Grand Canyon formed The truth is that no one knows for sure though there are some pretty good guesses, and it is usually thought that a number of processes combined to create the views that you see in today’s Grand Canyon. The most powerful force to have an impact on the...
How the Grand Canyon was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic(火山的) ...
根据“Some geologists believed that the process was a gradual one: the Colorado River which goes through the canyon slowly cut deeper and deeper into the ground over millions of years”可知,大峡谷是由于多年的河流造成的,故选A。 (2)题详解: 细节理解题。根据“Down-cutting is when a flood of...
从文章第一段的句子“Someevidence suggests thatthe process was a gradual one in which theColorado River( which runs through the canyon ) slowly cutdeeper and deeper into the ground over millions of years "可知,有些证据表明过去深深的峡谷是由于多年的河流的流动造成的,选B。②B【解析】细节理解题...
9.How the Grand Canyon (大峡谷) was created remains one of the geology's greatest mysteries.Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years.But volcanic...
How the Grand Canyon (大峡谷) was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic...
In the past, the Grand Canyon was believed to be made by A. a river running slowly over years B. a volcano breaking suddenly C. the rock rising from the earth D. the ground moving gradually( )2. Which picture shows the down-cutting of the canyon?A BC D()3. The photos of Mars ...
How the Grand Canyon (大峡谷) was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic...