After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered an Earth-sized planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid(液态)water. Scientists think there is a chance that the planet could have life.
The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion(万亿)kilometres -500 million times farther away from us than the moon.
A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can’t live that long, but robotic explorers could make the job easier. However, our fastest spacecraft don’t come anywhere near that one-tenth light-speed mark.
At present, scientists don’t know what the surface might be like on Gliese 581g. What they know is that the planet is at the sight distance from its star to have liquid water. It’s also at the right distance to have an atmosphere that could protect the water if it is on the surface.
Although spacecraft won’t be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes(望远镜)towards the planet and search for radiation(放射). By studying the radiation, scientists would find out about the chemicals(化学物质)around the planet and discover it Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea if the planet has life or not. But it’ll probably be many years before we can do this properly.
People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers.
【小题1】 What did scientists find in September 2010?

A.A planet with water. B.A planet similar to the earth.
C.A planet without life.D.A planet near the earth.
【小题2】According to the article, Gliese 581g ________.
A.is at the right distance from its starB.moves around the earth
C.is as far away from us as the moonD.can be reached in about 220 years
【小题3】 Paragraph 5 is mainly about ______.
A.the possibility of living on Gliese 581g
B.the kinds of chemicals around Gliese 581g
C.the way of looking for life on Gliese 581g
D.the aim of studying the radiation on Gliese 581g
【小题4】Which of the following is the best title for the passage above?
A.Gliese 581g, a Likely Living PlanetB.Gliese 581, a Likely Living Planet
C.Gliese 581g and Its StarD.Gliese 581g and Radiation

 

China's first moon rover (月球车), Yutu, set off from the lander(登陆车) early on December 15, several hours after the Chang'e-3 probe (探测器) soft-landed on the moon surface.

The 140 kg six-wheeled rover touched the moon surface at 4:35 a.m., leaving deep lines on the loose moon land. This was recorded by the camera on the lander and the images were sent to the earth, according to the Beijing Aerospace Control Center. After that, the rover and lander will take photos of each other and start their own science explorations.

Earlier this morning, engineers made final checks of the environment of the landing area and the situation of the probe(探测仪). Yutu, reached its solar panel (光板) and started to drive slowly to the moon at 3:10 a.m.. It took Yutu nearly a whole hour to complete the simple task.

Chang'e-3 landed at the Bay of Rainbows on the moon, at 9:11 p.m. on December 14, making China the third country in the world to carry out such a mission (执行此类任务) after the United States and Russia.

In old Chinese tales, Yutu was the white pet rabbit of Chang'e’s. The name for the rover was selected following an online survey that collected several million votes from people around the world.

The rover, 1.5 meters long with its two wings folded (折叠), 1 m in width and 1.1 m in height, is a perfect robot controlled by the command center from the earth. It will face challenges including temperature differences of more than 300℃ on the moon.

Yutu will do some research and look for natural resources (资源) for three months, while the lander will conduct an exploration at the landing place for one year. Then they will have a good rest on the moon and will not be used for a long time until China’s next probe visits the moon again.

1.Which is the best title for the passage above?

A. The American’sfirst rover on the moon  

B. The tale of Chang’e

C. The journey to the moon                    

D. Yutu explores the moon

2.Which is the correct order of the following events?

a. The 140 kg six-wheeled rover touched the moon surface.

b. The rover and lander will take photos of each other.

c. Yutu started to drive slowly to the moon.

d. Chang'e-3 landed at the Bay of Rainbows on the moon.

A. a-b-c-d                      B. c-d-a-b                        C. d-c-a-b                     D. c-a-b-d

3.What does the underlined word “width” mean in Chinese?

A. 智力                        B. 宽度                 C. 重量                        D. 长度

4.Which of the following is true according to the passage?

A. The moon had been visited by only two countries before 2013.

B. Yutu is a perfect robot under the control of its own computer.

C. Yutu and Chang’e will return to the earth after the one-year mission.

D. Chang’e-3 is 140 kg in weight.

5.There will soon be a second moon rover to explore the moon. Which is its proper name?

A. Chang’e-5               B. Yutu-2                     C. Shenzhou-11       D.Tiangong-2

 

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