once had flowing water, but numerous flybys, orbiters and landers have confirmed one undeniable fact -— any liquid (液体的) water that was once on its surface is now long gone.One idea, the Mars Ocean Hypothesis, suggests that Mars not only had some liquid water, but a lot of it. ...
The thing that's really cool is that 18degrees is not particularlt cold or particularly hot.Knowing the temperature of Mars is crucial to understanding the planet's history-its past climate,and whether it once had liquid water.先翻译这三段吧,语序要通顺哦,不要上网页翻译的. 扫码下载作业帮搜索...
The research team noted that the greatest significance of this discovery is expanding the evidence of Martian liquid water from the sparsely-populated polar regions to the more human-friendly middle and low latitudes. If there was once an ocean here, then with climate change, a large amount of ...
changing符合 题意,故选C。 57 C 细节理解题。根据第三段内容和第四段中的”there had to have been a period when it was warm enough and the atmosphere(大气层) was thick enough to support this much liquid (液态的)water at one time"可知,35亿年前火星可能存在液态 水。故选C。 反馈 收藏 ...
A studyfound evidence suggesting there is a large reservoir of liquid water under the surface of Mars, within fractured igneous rocks. Any evidence of the reservoir on the surface could have been erased or distorted by billions of years of wind erosion or other geological processes. ...
通读全文,并结合第一段“Researchers say they have discovered new evidence that Mars once had a large northern ocean. The finding adds to existing evidence that ancient Mars had the right conditions to possibly support some form of life.(研究人员表示,他们发现了新的证据,证明火星曾经有一个巨大的...
About 4 billion years ago, when the sun wasn't as big and bright,Earth was a snowballcovered in ice. Yet early Earth appears to have had liquid water that supported life. Scientists like Ojha think the solution to this mystery for our planet and ancient Mars is that other sources of he...
“These exciting observations of mature mud cracks are allowing us to fill in some of the missing history of water on Mars. How did Mars go from a warm, wet planet to the cold, dry place we know today? These mud cracks show us that transitional time, when liquid water was less abundan...
“As the rocks are altered by liquid water, water molecules become incorporated(吸收) into minerals like clays."The dat a and simulations indicated that the water on Mars was almost all gone by 3 billion years ago, around the time on the Earth when life consisted of single-cell microbes ...
twisted sister’ planet may once have had a shallow ocean’s worth of water. To see if Venus might ever have had a stable climate capable of supporting liquid water, Dr Way and his colleague, Anthony Del Genio, have created a series of five simulations assuming different levels of water ...