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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 right 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 if Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea whether 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.
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.

According to the article, Gliese 581g ________.

A.is at the right distance from its star B.moves around the earth
C.is as far away from us as the moon D.can be reached in about 220 years

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

Which of the following is the best title for the passage above?

A.Gliese 581g, a Likely Living Planet B.Gliese 581, a Likely Living Planet
C.Gliese 581g and Its Star D.Gliese 581g and Radiation
科目 英语   题型 阅读理解   难度 中等
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相关试题

There is a lion in a forest. Every day he goes about to look for food. The small animals in the forest are all afraid of him. Not far from the forestthere are four bulls(公牛). They are good friends, and often go about together. The lion tries many times to catch them, but can’t do so. Every time he comes near, the four bulls stand together to fight him. So he can do nothing to him.
One day the bulls have a quarrel(吵架). After that each of them goes his own way. When the lion sees this, he is happy. He catches one bull and eats him up. Then he catches another. One by one he catches all the four bulls and eats them up.
How many animals are there in the story?

A.Four B.Five C.One D.Many

Does the lion want to eat the bulls?

A.Yes,we want. B.No,he can’t. C.Yes,he does. D.No,he doesn’t

Why can’t the lion want catch the bulls at first?

A.Because the bulls are too big.
B.Because the bulls are good friends.
C.Because the bulls stand together to find him.
D.Because he is not strong enough to fight bulls.

How can the lion eat the bulls at last?

A.He catches them at one time and eats them up.
B.He catches one bull at a time and eats it up. Then he catches another.
C.He catches them at the time and eats them up.
D.One day he catches all the bulls and eats them up.

What does the story want to tell us?

A.The lion is the King in the forest.
B.Bulls are foolish to quarrel with each other.
C.Lions are stronger than bulls.
D.Untion(团结) is strength(力量)

Flight Timetbale

Flight number
Departure
Arrival
From
To
Stop
CA907
07:45
12:10
Beijing
Moscow
Chengdu
CA981
08:15
18:35
Beijing
New York
Shanghai
CA158
10:20
23:10
Beijing
London
Chengdu
CA149
11:35
22:10
Beijing
Sydney
Hong Kong
CA923
12:35
17:10
Beijing
Moscow
/
CA167
13:15
02:40
Beijing
Paris
Moscow
CA147
15:55
10:15
Beijing
Sydney
Guangzhou
CA949
17:25
07:35
Beijing
Paris
Shanghai
CA173
19:20
01:50
Beijing
Moscow
Urumqi
CA937
21:25
08:10
Beijing
London
Hong Kong

You’ll go toAustraliaand only takewhen you reachBeijingAirportat eleven forty.

A.CA923 B.CA149 C.CA167 D.CA147

If you want to go toFranceand spend fourteen hours and ten minutes, you should stay inon the way.

A.Hong Kong B.Moscow C.Shanghai D.Chengdu

It will take youto reachEnglandif you stop inHong Kong.

A.nine hours and twenty B.twelve hours and fifty C.ten hours and forty—five D.ten hours and thirty—five

You’d better take theplane if you want to spend least time to get toRussia.

A.one fifty B.seven forty—five
C.seven twenty D.twelve thirty—five

YouinBeijingif you want to go toAmerica.

A.may not take any plane B.may take three planes
C.may take two planes D.may take one plane

Many teenagers have hobbies. But sometimes these hobbies can get in the way of schoolwork, and parents might worry about their child’s success at school. Teenagers often think they should be allowed to practice their hobbies as much as they want. Do you agree?
Liu Yu, a fifteen-year-old boy from Shandong, is a running star. He is on his school running team and has always wanted to be a professional athlete. ________________ “Of course we want to see Liu Yu achieve his dreams,” says Mr Liu, “and we know how much he loves running. That’s great, and my wife and I have watched him in every one of his races. . ________________ But we do think that our son needs to be realistic. Now that he is getting older, he needs to think about what will happen. ________________.” Liu Yu doesn’t really agree. “Well, I think I should be allowed to make decisions for myself,” he says. “My parents have always taught me the importance of working hard and not just to do what I enjoy. I understand this. . ________________ Being a professional runners is the only thing I have ever wanted to do.”
Mr and Mrs Liu believe that Liu Yu should study hard in the evenings, and so they don’t allow him to practice running on school nights. “I know this seems strict,” says Mrs Liu, “but we think we’re doing the right thing. He has to understand that very few people can become professional athletes. It’s very difficult dream to achieve. We don’t allow him to practice every day ________________”

A. if he doesn’t become a professional runner in the end.
B. However, his parents won’t allow him to train as much as he would like to.
C. But I’m serious about running.
D. because we think he needs to spend time on his homework.
E. We have nothing against running.

London used to be “foggy” for the same reason that cities like Beijing or Chongqing are “foggy” today. The “fog” was in fact smog, a mixture of smoke and fog. In other words, it was made by air pollution. In London, some of this pollution came from factories, but much of it came from the coal (煤) that people burnt in their houses to keep warm during the winter. By the 1950s, London’s smog problem had become so bad that the government decided to do something to clean the air. A new law was made and nobody could burn coal in any British city. Within a few years, the air became much cleaner. There were no more “pea-soupers”.
Many Chinese cities now face the same sort of problem with air pollution that London faced 40 or 50 years ago. However, this problem is more difficult for Chinese cities to solve. One reason is that more of the pollution comes from the factories, rather than from coal burnt in people’s houses. If these factories were closed, this would harm the economy and lots of people would lose their jobs. Another reason is that changing from coal to cleaner fuel (燃料), like gas, is quite expensive.
However, the air in many Chinese cities is becoming cleaner and cleaner, as the government and people pay more and more attention to cutting down pollution. As a result, there are fewer “pea-soupers” in Beijing than there used to be.
What was the main reason for air pollution in London?

A.There was too much smoke in the sky.
B.There were too many factories in the city.
C.People burnt too much coal in the houses.
D.The city was too big for the cleaners to clean.

How did the air in London become much cleaner?

A.There was not so much fog in the winter later.
B.A law was made to keep people from burning coal in their houses.
C.Many factories in the city were closed.
D.People paid more attention to cleaning their city.

What does the underlined word “pea-soupers” refer to?

A.Smog. B.Smoke. C.Gas. D.Coal.

The problem of air pollution is more difficult for Chinese cities to solve because of _____ reasons.

A.one B.two C.three D.four

Which sentence is NOT true?

A.Air pollution is serious in Beijing and Chongqing.
B.Using coal is much more expensive than using gas.
C.Factories made much more pollution in China.
D.The reasons of air pollution in London and Beijing are different.

House for Sale
Comfortable family home with a large garden on north side of town. Three bedrooms, a kitchen,
a living-room, a dining-room and a bathroom. Offers over $35,000.
Assistant Wanted for Busy Restaurant
Some evening and weekend work. All meals free. Tel:3320178
You have to work on Saturdays and Sundays, but you get other days off. It’s not very well paid. But who cares about money?
Join Our Football Team
Boys and girls wanted to play in local football team. Aged 9-13 Meets in Green Park on Friday
at 3 pm.
Room to Rent (出租)
Small room to rent in city centre flat (公寓) above restaurant. Newly painted with modern furniture. Near main railway station. Buses pass the front door. Tel:3322108

Mr Brown wants to live near his workplace. Mrs Brown wants a house with four bedrooms. The Browns’ children don’t care what the house is like as long as the garden is big enough. Ann, their daughter has always wanted to work in a restaurant. She thinks it is an exciting place. It’s hard work but she isn’t lazy.
Tom is a middle school student. He is twelve years old. He stops school at half past three, so he has plenty of time to finish his homework.
Jack, Mr Brown’s brother, is looking for a room to rent. He doesn’t care what color the walls are or how old the furniture is. He is getting ready for his drawing. So the house must be quiet.
Why don’t the Browns buy the house in Advertisement One?

A.It is on the north side of town.
B.There isn’t enough bedroom.
C.There is no dinner room.
D.The garden is too big.

Why does Ann want to get the job in the restaurant?

A.It’s an easy job.
B.The place is good and the food is free.
C.She thinks it will be interesting.
D.She can get long holidays.

Why can’t Tom play for the new football team?

A.He is not old enough. B.It’s in a different village.
C.School stops too late. D.He has to do his homework.

What’s wrong with the room for Jack in Advertisement Four?

A.It’s too small. B.The walls are the wrong color.
C.The man likes old furniture better. D.It’s too noisy.

What does the sentence “All meals free” mean?

A.Assistants can have the meals at any time.
B.Customers can have the meals freely.
C.Assistant need to pay for their meals.
D.Assistants can have the meals in the restaurant without paying money.

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