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C
Could the solution to world future energy needs lie in the ocean? It’s possible.
We are not talking about oil, but another potential untapped energy resource called “methane hydrates”.
Methane hydrates are hard, ice-like white solids that form naturally in deposits (沉积物) on ocean floors. They arecomposed of water and highly concentrated methane produced by the microorganisms living in the deposits.
The remarkable thing is that you can hold a flame to a piece of methane hydrate and it will catch on fire. It’s been called “burning ice.”
Methane hydrates are spread around the world. These deposits may in the future become a very important fuel resource. One researcher calculated that a small area off the Southeastern coast of America may contain methane hydrates equal to 30 times the annual U.S. consumption of natural gas.
Right now there are very significant technical and financial challenges facing us before we could exploit this as a resource. Scientists around the world are studying these challenges. One big issue is how to get these methane hydrates off the ocean floor, causing undersea landslides and tidal waves.
Another issue is how to handle the matter after it is brought up. It’s also unclear whether it would make more sense to “mine” solid hydrates or tap the gases found with them. And many deposits may occur in low concentrations with no commercial potential.
Japan, which has no oil supplies of its own, has thrown itself into burning ice research because it has deposits off its shores which could make Japan less dependent on foreign suppliers of oil.
The U.S. Department of Energy and Congress are also supporting research. However, the US administration’s energy policy is focused on traditional fossil (化石) fuels. And at least for now, developing burning ice into a fuel source isn’t high on the energy industry’s list. But if natural gas continues to rise in price, exploiting burning ice might become economically practical.
59. What’s the meaning of the underlined word in Paragraph Two?
A. not existed B. Unseen C. available but not used D. unreal
60. What can you learn from the text?
A. Burning ice has been used in some countries.
B. Applying burning ice tops the energy list in America.
C. Burning ice exists in few countries.
D. There are still some problems in developing the burning ice
61. Why has Japan already begun to develop the burning ice?
A. It is a developed country. B. They want to help other countries.
C. It lacks oil supplies of its own. D. America asked Japan to do so.
62. Which one is the best title of the text?
A. World Energy Shortage B. Burning Ice Holds Hope as Fuel Source
C. Methane Hydrates D. Methane Hydrates Spread around the World
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B
“Can I see my baby?” asked the happy new mother. The bundle (婴儿包) was placed in her arms and when she moved the fold of cloth to look upon his tiny face, she gasped—the baby had been born without ears. Time, however, proved that the baby’s hearing was perfect except his appearance.
One day when he rushed home from school and threw himself into his mother’s arms, he cried out bitterly, “A boy, a big boy … called me—a f-…freak.” She sighed, knowing that his life was to be endless of heartbreaks.
He grew up, handsome for his misfortune. A favorite with his fellow students, he might have been class president, but for that. He developed a gift for literature and music.
The boy’s father had a talk with the family doctor. Could nothing be done? “I believe we could graft(移植) on a pair of outer ears, if they could be donated (捐献),” the doctor decided. So the search began for a person who would make such a sacrifice for a young man. Two years went by. Then, “You’re going to the hospital, son. Mother and I have someone who will donate the ears you need. But it’s a secret.” said the father.
The operation was a brilliant success. His talents blossomed into genius. School and college became a series of successes. Later he married and entered the diplomatic(外交) service. “But I must know!” he urged his father. “Who gave so much for me? I could never do enough for him.”
“I do not believe you could,” said the father, “but the agreement was that you are not to know … not yet.” The years kept the secret, but the day did come … one of the darkest days that ever pass through a son. He stood with his father over his mother’s casket(灵柩). Slowly and tenderly, the father stretched forth a hand and raised the thick, reddish-brown hair to let out the secret.
59.The story is mainly about _______.
A．how a boy had new ears through an operation
B．what a devoted parent privately did for the child
C．how a disabled boy turned into a useful person
D．why a donator made a sacrifice to a bright boy
60.From the first paragraph we know that the mother _______.
A．was determined to donate her ears to perfect her son
B．kept her husband unknown about the baby’s situation
C．felt shocked and disappointed to see her new baby
D．complained of her bad luck to have a disabled child
61.What can be inferred from the passage?
A．The agreement was between the donator and the family.
B．The boy was so popular that he was made class president.
C．Finally the boy came to know who the donator was.
D．The mother donated her ears to her son after she died.
62.What moral lesson can we draw from this reading?
A．Real love lies in what is done unknown rather than what is done known.
B．It is up to parents to help their children heart and soul.
C．True beauty lies only in the heart not in appearance.
D．It is a virtue for young generations to learn to be grateful.
查看习题详情和答案>>C
Could the solution to world future energy needs lie in the ocean? It’s possible.
We are not talking about oil, but another potential untapped energy resource called “methane hydrates”.
Methane hydrates are hard, ice-like white solids that form naturally in deposits (沉积物) on ocean floors. They arecomposed of water and highly concentrated methane produced by the microorganisms living in the deposits.
The remarkable thing is that you can hold a flame to a piece of methane hydrate and it will catch on fire. It’s been called “burning ice.”
Methane hydrates are spread around the world. These deposits may in the future become a very important fuel resource. One researcher calculated that a small area off the Southeastern coast of America may contain methane hydrates equal to 30 times the annual U.S. consumption of natural gas.
Right now there are very significant technical and financial challenges facing us before we could exploit this as a resource. Scientists around the world are studying these challenges. One big issue is how to get these methane hydrates off the ocean floor, causing undersea landslides and tidal waves.
Another issue is how to handle the matter after it is brought up. It’s also unclear whether it would make more sense to “mine” solid hydrates or tap the gases found with them. And many deposits may occur in low concentrations with no commercial potential.
Japan, which has no oil supplies of its own, has thrown itself into burning ice research because it has deposits off its shores which could make Japan less dependent on foreign suppliers of oil.
The U.S. Department of Energy and Congress are also supporting research. However, the US administration’s energy policy is focused on traditional fossil (化石) fuels. And at least for now, developing burning ice into a fuel source isn’t high on the energy industry’s list. But if natural gas continues to rise in price, exploiting burning ice might become economically practical.
59. What’s the meaning of the underlined word in Paragraph Two?
A. not existed B. Unseen C. available but not used D. unreal
60. What can you learn from the text?
A. Burning ice has been used in some countries.
B. Applying burning ice tops the energy list in America.
C. Burning ice exists in few countries.
D. There are still some problems in developing the burning ice
61. Why has Japan already begun to develop the burning ice?
A. It is a developed country. B. They want to help other countries.
C. It lacks oil supplies of its own. D. America asked Japan to do so.
62. Which one is the best title of the text?
A. World Energy Shortage B. Burning Ice Holds Hope as Fuel Source
C. Methane Hydrates D. Methane Hydrates Spread around the World
查看习题详情和答案>>A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces (熔炉) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die.
The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.
After the explosion gravity pulls in what’s left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds.
The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!
That’s what we know about black holes. What we don’t know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.
But if the black hole doesn’t keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a “white hole” in a different universe. As the black hole swallows light, the white hole shines brightly—somewhere else. But where? A different place, perhaps, or a different time — many years in the past or future.
Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed. So far the time being, black hole must remain a mystery.
Black holes are a mystery—but that hasn’t stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth’s energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste—a sort of huge waste disposal(处理) in the sky!
When the star begins to die ______.
A. there is no fuel left in it B. its outer layer goes into space first
C. a huge explosion will happen D. it doesn’t give off light any longer
Which of the following doesn’t help produce a black hole?
A. The gravity inside the star is very strong. B. The light can’t go out of the star.
C. The star becomes smaller and smaller D. The dying star shines very brightly.
The black hole ______.
A. continues becoming smaller and smaller all the time
B. goes into another universe and becomes a white hole
C. can pull in everything we know of in the world
D. will appear at another place at a different time
What’s the best title for this passage?
A. A New Scientific Discovery: Black Holes
B. How Do Black Holes Come Into Being?
C. What Are Black Holes?
D. Travel Through A Black Hole
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A new weapon is on the way in the fight against smoking in Europe.
Soon when smokers buy cigarettes, they might see a shocking photo of
a blackened lung or a cancer patient staring back at them from the packet.
Some boys may think of smoking as cool and sexy. Their friends won’t
agree when they see their packets of cigarettes lying on the table.
The European Union announced on October 22, that it had chosen 42 photos that showed the damage cigarettes could do to the body. It called on member nations to put these pictures on packets to discourage young smokers.
To catch the attention of teenagers, the special packets warn of long-term medical dangers, like cancer. Short-term effects, like bad skin, are also on the list.
“The true fact of smoking is disease, death and horror. That is the message we should send to the young,” said David Byrne, an EU health official. “Hopefully these pictures will shock students out of their love for cigarettes.”
The EU head office hoped the pictures would work better than current written warnings on packs of cigarettes. The warning included “smoking kills” and “smoking can lead to a slow and painful death.”
So far, Ireland and Belgium have shown interest in the photos. Canada has used similar pictures and warnings on cigarette packs since 2000．The country has recently seen a fall in the number of smokers.
According to studies, smoking is the single biggest cause of avoidable death in EU. Every year more than 650,000 smokers die, more than one person a minute.
68．What would be the best title for the text?
A．New Ways to Stop Smoking. B．Pictures to Shock Smokers.
C．New Packers of Cigarettes. D．Dangers of Smoking.
69．We can learn from the test that _______.
A．The EU countries have put the new warning method into practice
B．only a small number of the EU countries have used the new warning method
C．the new warning method has worked in some EU countries
D．countries in the EU still use the old warning method
70．Which country is most successful in stopping smoking?
A．Ireland. B．Belgium. C．Canada. D．EU
71．The underlined sentence in the last paragraph suggests that ________.
A．It’s hard to stop smoking in EU
B．deaths caused by smoking could have been avoided
C．smoking is the biggest cause of deaths in EU
D．EU has the largest number of deaths caused by smoking
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