当我们想出一个场景时，我们会兴奋地颤抖，认为也许我们已经接近实际发生的事情了。行星学家从行星的当前位置出发，试图借助计算机模拟来假设出太阳系形成的场景。Our Solar System, like all planetary systems, formed from a cloud of gas and dust that surrounded the young Sun 4.5 billion years ago. But ...
5 billion years ago, Mars and Earth began their existence under similar conditions. During the first billion years, liquid water-in contrast to ice-was abundant on the surface of Mars. This is an indication that Mars was much warmer during that time. Mars also had a thicker atmosphere of ...
根据最后一段 so the changes that have occurred in just the last 40 years are very troublingfor scientists可判断,科学家们对此持有否定的态度,故选B。 结果一 题目 阅读理解Ever since Earth formed roughly 4. 5 billion years ago, its climate has gone through anumber of incredible changes.All ...
This process took about a billion years. About 5 billion years ago, some of this gas and matter became our sun. At first, it was a hot, spinning cloud of gas that also included heavier elements. As the cloud spun, it collected into a disc — that solar nebula we mentioned a few ...
EversinceEarthformedroughly4.5billionyearsago,itsclimatehasgonethroughanumberofincrediblechanges.AllyouhavetodoislookatimagesoftheJurassicPeriod(侏罗纪时期)toknowthatatonetime,muchofourplanetwascoveredinextremelyhotandhumidjungle.Skipaheadacouplemillionyearsandyougettoaniceageevent,whenglobaltemperatureexperiencedahuge...
(1)D.形容词辨析.A更老的,B更大的,C更小的,D更年轻的,根据上句Scientist believe the earth is 4.6 billion (十亿)years old.科学家认为地球有46亿年的历史。这里应该是我们今天看到的沙漠和森林比这要年轻得多,故答案是D.(2)B.副词辨析.A几乎不,B只,C相当地,D永远,根据The Baltic Sea, the younges...
翻译结果1翻译结果2翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 About 4.6 billion years ago, the newly formed Earth is burning lava ocean parcel of reach tens of meters, the thickness of the magma. Neither when Earth crust, not the Earth's core. Lava ocean gradually...
根据最后一段中“Depending on the species, it can take anywhere from one generation to thousands and thousands of years to properly adapt, so the changes that have occurred in just the last 40 years are very troubling for scientists.(根据物种的不同,它可能需要一代人到几千年的时间来适当适应,...
阅读理解 Ever since Earth formed roughly 4.5 billion years ago, its climate has gone through a number of incredible changes.All you have to do is look at images of the Jurassic Period(侏罗纪时期) to know that at one time, much of our planet was covered in extremely hot and humid jungle...
54 BILLION YEARSHi! My name is Earth. Some people call meGaia, the blue marble(大理石), the world, or thethird planet from the sun. You can call me PlanetAwesome.I was born 4. 54 billion years ago. I don'tremember what it was like to be a baby. Who does?But I've been told...