根据第一段“With the fast development of astronomy, astronomers are eager to find a hint of the familiar: planets that resemble Earth. By pushing technology to the limits, astronomers ar idly approaching the day when they can find another Earth.(随着天文学的快速发展,天文学家们渴望找到一个熟悉...
A. Earth is a star. B. Planets don't move. C. Earth moves around the moon. D. Earth moves around the sun. 相关知识点: 试题来源: 解析 D。A 选项“地球是一颗恒星”错误。B 选项“行星不移动”错误。C 选项“地球围绕月亮转”错误。只有 D 选项正确地表达了文中内容。反馈...
Professor: OK. We've been discussing the planets in our solar system and how some of the ones farthest from the sun were discovered. 教授:好,我们一直在讨论我们太阳系中的行星,以及距离太阳最远的一些行星是如何被发现的 Well, today I'd like to turn to what are called exoplanets and how rese...
So molecules like this ended up on Earth. In fact, what we call meteorites are pieces broken away from comets and asteroids that came in our atmosphere and left their extra-terrestrial organic matter on the surface of primitive Earth.这样的分子最终来到了地球上。事实上，我们所说的陨石是来自彗星...
Like all the planets in this solar system, Earth rotates around an axis, an imaginary line between its North and South poles. At the same time, it orbits the sun, finishing a new lap every 365.25 days. Relative to its pathway around the sun, Earth's axis has a 23.5-degree angle tilt...
五、从方框中选择适当的词并用其正确形式填空,其中有两个词是多余的our, and, an, earth, what, call, for many, that, example, fly, of-“UFO” stands 1. for the“unidentified(未辨别出的)flying object”. It is a general term for anything seen in the sky2. that cannot be explained or ...
由“Water had already disappeared from planets like Mars or satellites like the moon, but it stayed on the earth. This is how the earth began to show its special qualities.”可知水一直存在于地球上是地球与其他星球的不同。故选B。 2.考查细节理解。由“It allowed the earth to dissolve harmful...
We can see geologic evidence of bio mineral production in what are called stromatolites. 我们可以通过叠层石得到地质学上关于生物矿物质产生的证据。 Stromatolites look like wavy layers of sedimentary rock, but they are really fossils, fossils of the waste from microbial mats. ...
Scientists also believe that understanding what's unique about Earth is crucial for understanding what other planets might be like. After all, even with all the spacecraft humans have sent out to explore our neighboring worlds, Earth remains the only one with which we have first-hand knowledge....
In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on Mars by the 2030s.