One of the most common questions is “Is there life in other planets?" Since the first famous UFO sighting in 1947, the _ 31_ of life on other planets has been discussed without stopping. The subject has been used in many TV programs _ 32 _ films. Scientist have come up with many ...
The sun is about ten times the size of our earth in the sky. Its surface may have rocks and water like the Earth. Its gravity is 1.6 times as strong as Earth's. So a 40kg person would feel as if he weighed 64kg. You would be bored if you went to school there. A day on ...
Well, we've all been hearing about ongoing Mars exploration, and how water probably used to be abundant there. And a water spewing volcano was recently discovered on a small moon orbiting Saturn. Water is one sign that life may exist or have existed at some point. ...
Saturn: The Ringed Planet Neptune also has no solid surface, but hosts amixture of water and different kinds of ice over a solid core. In the atmosphere, you would encounter hydrogen, helium, andfrozen methaneclouds filling the skies that would block the dim rays of the distant Sun. Martian...
Because of the large population, there is less living space for each family. And it is difficult for lots of people to find jobs. At the same time, the large population has caused many other difficulties for the whole nation. For example, it...
C. Scientists think there may be life on other planets. D. Europa, an icy moon, may be covered in water.()2. In the past scientists believe that A. cold planets could not support life B. little green men lived on other planets C. life could be found on Europa D. life could be ...
B. Most of Jupiter is covered by water. C. The rings around Saturn are made of three things. D. There are strong winds and storms on Uranus. 相关知识点: 试题来源: 解析 【解析】 【文章大意】本文主要介绍了太阳系中的 八大行星。 1 【答案】 B 【解析】 题干意思是:2006年以前科学家认为...
Mars is a cold, dry world with average temperatures around -63 degrees Celsius (-81 degrees Fahrenheit). The primary weather on the planet consists of dust storms, and while there is no liquid water on the planet, probes occasionally develop layers of frost crystals during the long, cold nig...
[#insert1] However, it lacks any sign of a hydrologic system (water circulation and distribution): there are no streams, lakes, oceans, or glaciers. [#insert2] Space probes suggest that Venus may have started with as much water as Earth, but it was unable to keep its water in liquid ...
12. There is a good social life in the village, and I wish I ___(have) a second chance to become more involved.13. They might have found a better hotel if they___ (drive) a few more kilometers.14. 1f we ___(catch) the flight yesterday, we would be enjoying our holiday on ...