Water is the one thing that sets Earth apart from other planets in the solar system. Scientists believe that Mars and Venus may once have had water, and may still have some underground water. Earth is the only planet that has a large amount of surface water....
七、阅读理解 Mars is not what it seems,the dry old planet we once believed it to be. Astronauts who are expected to go there in next ten years may find plenty of water to get their thirst away. If there is water,it will be much more possible to find life on Mars. This is the ...
1___ much is known about the surface of Mars, what happened during a long time remains unknown.A.ForB.WhileC.SinceD.Because 2 ___ much is known about the surface of Mars, what happened during a long time remains unknown. A. For B. While C. Since D. Because 反馈 收藏 ...
题目What can be inferred about water on Mars? A. It is not present in a liquid state. B. It doesn’t exist in large quantities. C. It will bring potential dangers to settlers. D. It can be E. asily changed into liquid F. orms. ...
What can be inferred about water on Mars? A. It is not present in a liquid state. B. It doesn't exist in large C. quantities. D. It will bring potential dangers to settlers. E. It can be F. asily changed into G. liquid forms. ...
___ much is known about the surface of Mars, what happened during a long time remains unknown. [ ] A.For B.While C.Since D.Because 相关知识点: 试题来源: 解析 答案:B 解析: 根据题意,此处应表示“虽然”,只有 B 项 while 可表示此意。 since 意为“既然”。 分析总结。 下载作业精灵...
A. Mars is as big as the Earth in size. B. Mars is the fourth planet from the Earth. C. The surface of Mars is similar to that of the Earth. D. Mars is one of the planets whose surfaces can...
百度试题 结果1 题目() 7. In some ways,life on Mars is much bette thanon the Earth.A. thatB. thoseC. whatD. it 相关知识点: 试题来源: 解析 A(x÷ 反馈 收藏
The presence of water is the linchpin in three main questions about Mars: Could we live there? Did something else live there? Doessomething else live there? And questions like that are exactly what the Mars rovers were sent to the planet to explore. ...
Here is what life will be like.First of all, it will be easier for us to go out. Now our spaceships are too slow to take largernumbers of people to Mars. However, by 2100, it will take us two or three days to get to Mars byspaceship!Secondly, people need food, water and air ...