Are we alone in space? Is the Earth the only planet that has life?
On Feb. 22nd, NASA said they found seven Earth-like planets.
For scientists, the finding is not an end. Next, they will try to find out if the planets have atmospheres（大气层）.
| A．It means there could be liquid water on them. |
| B．That seems too far away from us. |
| C．These are big questions in the science world. |
| D．The seven planets are very close to one another. |
| E．They all nearly have the same size as Earth. |
相似题推荐
In the universe (宇宙) , as we all know, there is the Sun, the Moon, the Earth and a large number of stars. Through our Geography lessons, we know that the Sun is a star, the Earth is a planet and the Moon is a satellite (卫星) . We also know the Earth goes around the Sun and the Moon goes around the Earth. We have day and night because the Earth keeps turning all the time When our part of the Earth turns to the Sun, it is day. When our part of the Earth turns away from the Sun, it is night.
Just because the Moon is closer to the Earth than the Sun, it looks much bigger than the Sun. Big things will look smaller when they are farther and small things also look bigger when they are nearer.
The Sun is big enough to give out strong light. The Moon can’t give out any light at all, but it looks quite bright, too. Why? In fact, the light from the Moon comes from the Sun. The Moon looks much bigger and brighter than the stars, but in fact the stars are much bigger and brighter than the Moon. They look smaller than the Moon also because they are farther away from the Earth.
There are many other facts about the universe and we should study hard to know more.
1. Who can help us know a lot about the universe?| A．An Art teacher. | B．A Geography teacher. | C．A Math teacher. | D．An English teacher. |
| A．closer | B．farther | C．brighter | D．darker |
| A．The Moon is the only one to move between the Earth and the Sun. |
| B．The Moon goes around the Earth and it also moves around the Sun. |
| C．The Moon goes around the Sun and its light is coming from the Sun. |
| D．The Moon goes around the Earth and it can’t give out any light at all. |
| A．Some facts about the Sun | B．Some facts about the Moon |
| C．Some facts about the Earth | D．Some facts about the universe |
| Amazing Space | |
 | Curiosity, NASA’s Mars rover (探测器), recently took the world by surprise. It took a picture of a small “flower” while it was exploring the surface of Mars. Clearly, it’s not an actual flower. But it could be a rock that had been created a long time ago. Back then, the Red Planet possibly had water on its surface. The effort of the rover could help answer the question of whether life ever existed on Mars and understand when Mars might have been most suitable to host life. |
 | Saturn’s (土星) beautiful rings which are made of ice and rocks won’t last forever. Scientists say that they are slowly breaking apart and will totally disappear in about 300 million years. The rings now may be 10 — 100 million years old. According to The Atlantic, 10 tons of “ring matter” fall into Saturn every second. They all get pulled by Saturn’s gravity. Jupiter (木星), Uranus (天王星) and Neptune (海王星) also have ring systems. Saturn has the largest rings, though — the others’ rings aren’t as easy to see, they may have had bigger rings in the past. |
| A．Three. | B．Four. | C．Five. | D．Six. |
| A．The two pictures were both taken by NASA’s Mars rover. |
| B．The ring systems of Jupiter, Uranus and Neptune are easy to see. |
| C．There is no doubt that Mars had water on its surface long ago. |
| D．The beautiful rings of Saturn will disappear because of the gravity. |
| A．There is a real flower in the picture. |
| B．The picture was taken by accident. |
| C．The “flower” proves that there were lives existing on Mars. |
| D．The picture will help us have a better understanding of Mars. |
| A．By offering numbers. | B．By asking questions. |
| C．By giving examples. | D．By making comparisons. |
| A．compare Mars with Saturn | B．show the new discoveries of space |
| C．introduce the changes of the two planets | D．encourage us to protect the planet we live |
【推荐3】Now the world’s population is growing faster and faster. There will soon be no room on the Earth for more people, so more and more countries, including China, send spacemen to develop the space as human’s second home in the future.
But space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success.
Scientists have found out that radiation is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of radiation from the Sun and other stars, which is bad for their health.
Space junk is also thought to be a great danger to spacemen. It’s reported that there are 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space junk. These junks are flying in space. They may knock against spaceship windows and do some damage. Scientists are watching and reporting any possible danger all the time. They are working on helpful ways to deal with space junk.
So we should care for space and do something to help improve the space environment.
1. Why do more and more countries send spacemen to search or work in space?| A．Because the space is very amazing. | B．Because there is much junk in space. |
| C．Because there is much radiation in space. | D．Because they are developing human’s second home. |
| A．scientists working on the Earth | B．spacemen working in space |
| C．scientists living on the Earth | D．spacemen working on the Earth |
| A．Radiation isn’t bad for the spacemen’s health. |
| B．Every one of us can make a trip to space now. |
| C．Radiation in space comes from the Sun and other stars. |
| D．Scientists have found out ways to solve any problem in space. |
