Not too big, not too small. Not too hot, not too cold. A newly discovered planet looks just right for life as we know it, according to an international group of astronomers.
Orbiting a star about 500 light years away, the planet called Kepler-186f is about the same size as Earth. As this astronomer’s explanation shows, it orbits its star at the right distance for liquid water on the surface. That is an essential condition for life as we know it.
But it is not exactly like Earth, NASA planetary scientist (行星科学家) Elisa Quintana said via Skype. “It’s more of an Earth’s cousin. It’s not an Earth’s twin. It shares the same characteristics as Earth, but their parent stars are very different.” said Quintana.
Kepler-186f orbits a star that is smaller and cooler than our sun. But, writing in the journal Science, the astronomers say the planet appears to be a closer relative than most of the hundreds of others discovered so far. Some are large gas-covered giants with thick atmospheres. Others orbit too closely to their stars and are too hot for life.
Two planets discovered last year are in the right orbit and might be good candidates (候选人) for life Quintana says, but they are a bit bigger than Earth.
“For the first time, we can actually say we now have a planet that is both Earth-sized and orbits in its star’s habitable (适合居住的) zone,” she said.
“It may be the first time, but it probably is not the last,” says Massachusetts Institute of Technology astrophysicist Sara Seager. She spoke to VOA via Skype.
1. What’s the best title of the passage?| A．New Earth-size planet found | B．Kepler-186f’s orbit |
| C．A NASA planetary scientist | D．Planets |
| A．An unimportant. | B．A dangerous. |
| C．A difficult. | D．A necessary. |
| A．Kepler-186f is at the right distance for liquid water on the surface. |
| B．Kepler-186f is exactly as big as Earth. |
| C．Kepler-186fs and the Earth’s parent stars are very different. |
| D．The star that Kepler-186f orbits is smaller and cooler than our sun. |
相似题推荐
【推荐1】What would it be like to live on Mars? Volunteers are spending eight months in an area that looks much like the surface of Mars. They are isolated high on top of Mauna Loa, a volcanic mountain on the Big Island of Hawaii, living on a simulated, or make-believe, Mars Base.
The project called HI-SEAS is in the charge of Kim Binsted. She says this wild environment is as close to Mars as you can find on Earth. Because it is so high, the land is not warm or rich with plants, like the rest of Hawaii.
“You will see there is really no visible plant life or animal life. And you have got this wonderful volcanic material.”
Mauna Loa, 2,500 meters above sea level, is geologically very similar to Olympus Mons on Mars and almost as tall as that Martian mountain. When measured from its base, deep in the ocean, Mauna Loa is the second largest mountain in our solar system, after the one on Mars.
The six member HI-SEAS crew is mostly self-sufficient. Food and supplies are brought to them. But the individuals bringing those supplies cannot communicate with volunteers inside the habitat, or base.
Kim Binsted says this experiment looks at how the astronauts interact, or get along with each other. “We study how well they work together, how we can keep them happy and supported, and not wanting to kill each other over these long durations.”
Crew members communicate with the outside world through e-mail and blogs. They also produce videos on the YouTube website, like this one from mission commander Martha Lenio.
“I am really enjoying this opportunity to live in this dome and pretend that I’m on Mars and get to learn all sorts of new skills.” one of them said.
“Whoever gets there first, the trip will not be easy,” says Kim Binsted.
“It is going to be challenging.”
1. . What do we know about Olympus Mons?| A．It is 2,500 meters above sea level. |
| B．It is geologically similar to Mauna Loa. |
| C．It is the second largest mountain on the earth. |
| D．It is a mountain on the Big Island of Hawaii. |
| A．To set up a space station. |
| B．To explore new settlement for human. |
| C．To study how the astronauts treat each other. |
| D．To prove human can live in whatever conditions. |
| A．By Internet. | B．By telephone. |
| C．By letter. | D．By fax. |
| A．Volunteers First Explore Mars |
| B．Volunteers Experience Life in Hawaii |
| C．Volunteers Get Taste of Mars in Hawaii |
| D．Volunteers Study the Environment on Mars |
【推荐2】If a scientist sees a unicorn (独角兽), she’ll probably want to see more than one before telling the world about her discovery. But sometimes one unicorn is enough.
In 2007 an astronomer named Duncan Lorimer reported finding a new kind of astronomical event. It was a brief stream of energy so powerful that it could reach Earth from a galaxy billions of light-years away. He called it a fast radio burst (FRB). This remarkable find, if real, could make huge contributions to the study about universe. He predicted there would be many more – but that year, he spotted just one.
It’s not unheard of for one event to kick off a whole new field of scientific inquiry. Still it’s rare. When Lorimer’s paper came out in the journal, it was not surprising that many were skeptical. “Sometimes, what seems like a remarkable scientific discovery turns out to be an error in the data,” some commented.
Later, a young graduate student was assigned the task of finding more FRBs. Using the same radio telescope Lorimer once used, she found more bursts that just looked like FRBs. But because of the ways they appeared in the telescope data, she was virtually certain that they were some other kind of radio interference and gave them another name: perytons. As years ticked by and no more FRBs were discovered, some astronomers began to conclude Lorimer had found nothing more than an unusual example of one of these perytons.
Good news: in 2011, there was a report of a second FRB. Four more were found in 2013. Bad news: all of them came from the same Lorimer’s radio telescope. But ultimately, in 2014, there was a report from another radio telescope. More discoveries started showing up from other telescopes on a somewhat regular basis. At last the conversation about FRBs shifted – from whether they were real to where they came from.
Years of research have passed by since then. Now, Victoria Kaspi, a physics professor and principal investigator on the FRB team, predicts that once the more advanced telescopes come online in 2024, the location and distance of most FRBs detected can be found out, which will provide “golden opportunities for astronomers to study the large-scale structure of the universe”.
Finally, this “unicorn” story came to a somehow surprising end. Several years ago, a team reanalyzed the same data from the radio telescope by which Lorimer found the first FRB. There was one more that they had previously missed. Since then, other teams have analyzed even older data and found FRBs in those datasets too.
“They were just sitting there, waiting to be discovered by better techniques,” Lorimer says.
1. Which of the following has the closest meaning to the underlined word in paragraph 3?| A．Optimistic. | B．Curious. | C．Supportive. | D．Doubtful. |
| A．To suggest that the new scientific discovery was a myth. |
| B．To imply magical creatures may actually exist in the world. |
| C．To symbolize the previously unknown and unseen discoveries. |
| D．To quote an incident that once happened in the field of science. |
| A．Because it might mean the results were not reliable. |
| B．Because they were all found by a young graduate student. |
| C．Because these were given the name perytons and were not real FRBs. |
| D．Because not every astronomer had the same type of telescope as Lorimer. |
| A．It’s possible for just one event to start a new field of scientific research. |
| B．New scientific discoveries can’t be made without advanced research techniques. |
| C．Scientists shouldn’t deny new discoveries even if they lack evidence temporarily. |
| D．Scientists should be careful to distinguish new discoveries from errors in the datasets. |
【推荐3】Have you ever wanted to take a closer look at the stars and see some of the coolest parts of our universe? Then you'll need a telescope, a big one.
The Hubble Space Telescope is the biggest, the most delicate and the most complex astronomical telescope ever. Hubble is eight feet across and 44 feet long and it weighs more than 25, 000 pounds. So it is much bigger than any telescope that you've ever used from your backyard. It orbits the earth at an altitude of 600 kilometers. NASA fuels it with the largest power source we know — the sun, with two large solar panels capturing sunlight. The Hubble Space Telescope is not only big in size and low on energy. It's also fast. It travels around the Earth at about 28,000 kilometers per hour, so about 17,398 miles per hour. And it orbits the earth every hour and a half. At this rate, Hubble could travel- from Los Angeles to Boston in about ten minutes.
Hubble is the only telescope designed to be maintained in space by astronauts. A series of space shuttle missions have repaired, upgraded, and replaced systems on the telescope, including all four of the main instruments; a brand — new set of cameras and spectrographs (摄谱仪) was installed in Hubble during the fifth and final servicing mission, which was completed in 2009. Although it has nearly doubled its expected lifetime, with April 24, 2020 its 30th anniversary, it still remains in operation and continues to be one of the most important tools to learn about the universe.
Hubble has made countless discoveries during its service, and answering new puzzles requires more powerful telescopes. Its legendary life will come to an end due to the aging of its components. One of Hubble's greatest legacies (遗产) is not just to answer questions about the universe but also to open up new mysteries that we can solve with future telescopes.
1. What is introduced about Hubble in paragraph 2?| A．Its future. | B．Its launch time. |
| C．Its energy source. | D．Its servicing mission. |
| A．Three times. | B．Four times. | C．Five times. | D．Six times. |
| A．30 years. | B．24 years. | C．20 years. | D．15 years. |
| A．Hubble will be repaired for another time. |
| B．Hubble will be replaced by future telescopes. |
| C．Hubble fails to help observe farther galaxies. |
| D．Hubble keeps on performing remarkably well. |
【推荐1】Fires sweeping across the Amazon rainforest this year have been a hot topic as scientists and environmental groups are worried that they will worsen the climate change crisis and threaten biodiversity.
As the largest rainforest in the world, the Amazon rainforest is often called "the lungs of the world". It is also home to about 3 million species of plants and animals, and 1 million native people. The vast areas of the rainforest play an important role in the world’s ecosystem because they absorb heat instead of it being reflected back into the atmosphere. They also store carbon dioxide and produce oxygen, ensuring that less carbon dioxide is released, mitigating the effects of climate change.
"Any destroyed forest is a threat to biodiversity and people," Thomas Lovejoy, an ecologist at George Mason University told National Geographic. "The overwhelming threat is that a lot of carbon dioxide goes into the atmosphere," he stressed. "In the midst of the global climate crisis, we cannot afford more damage to a major source of oxygen and biodiversity. The Amazon rainforest must be protected," U. N. Secretary General António Guterres said.
Data from the National Institute for Space Research (INPE) show that the number of forest fires in Brazil quickly increased by 82 percent from January to August this year compared to the same period last year. A total of 71,497 forest fires were registered in the country in the first eight months of 2019, up from 39,194 in the same period in 2018, INPE said. "We estimate that the forest areas in the Brazilian Amazon rainforest have decreased by between 20 and 30 percent compared to the last 12 months," Carlos Nobre, a researcher at the University of São Paulo, told German broadcaster Deutsche Welle.
Brazil owns about 60 percent of the Amazon rainforest, whose degradation (恶化) could have severe consequences for global climate and rainfall. The extent of the area ruined by fires has yet to be determined, but the emergency has transcended (超出) Brazil’s borders, reaching Peruvian, Paraguayan and Bolivian regions.
1. What does the underlined word "mitigating" in paragraph 2 probably mean?| A．Increasing. | B．Relieving. |
| C．Ignoring. | D．Improving. |
| A．The biodiversity makes the rainforest unique. |
| B．The rainforest fires result in serious consequences. |
| C．The global climate crisis brings more rainforest fires. |
| D．The dry weather leads to the rainforest fires. |
| A．To prove the importance of the rainforest. |
| B．To show reasons for forest fires. |
| C．To explain the process of the research. |
| D．To present the reduction in rainforest areas. |
| A．The climate change crisis is worsening. |
| B．The forest areas are on the decline. |
| C．"The lungs of the earth" is burning. |
| D．The world’s ecosystem is under attack. |
Discovered by Amateurs
Some astronomers spend their entire careers looking for new discoveries in space, but a 10-year-old Canadian girl found one on her first try. In January, 2011, Kathryn Gray, who often studied stars, was looking at recent pictures of outer space and comparing them to pictures taken years earlier. The pictures were just thousands of tiny spots of light, but Gray spotted a star that looked different in the recent pictures. Could it possibly be a supernova (超新星)? Usually a supernova is brighter, and it becomes visible through a telescope due to the brightness. Later Gray’s discovery was confirmed, and she became the youngest person to discover a supernova.
Throughout history, important discoveries in astronomy have been made by amateurs. An early example is William Herschel, who discovered Uranus in 1781. Uranus had been observed before, but expert astronomers thought it didn’t belong to our solar system. When Herschel saw it with a telescope he had designed and built himself, he realized that it was orbiting the sun. This meant that Uranus was a planet. And so, the map of our night sky was changed forever.
Then in 1930, a major discovery was made by a 24-year-old man, a farmer’s son, with no college education or formal training in astronomy. Clyde Tombaugh had built a homemade telescope using instructions from an article in a boy’s magazine. He used to draw detailed pictures of the surfaces of Mars and Jupiter. He sent the pictures to Dr. V. M. Slipher at the Lowell Observatory, who was so impressed and offered him a job on his team. Within a year, Tombaugh discovered a ninth planet, Pluto. It was regarded as a planet for 76 years, but scientists decided in 2006 that Pluto didn’t meet all of the criteria for a true planet. It was then considered to be a dwarf planet.
John Dobson is another influential amateur astronomer because he enabled so many others to take up astronomy as a hobby. In 1956, after constant attempts, he built a powerful telescope out of low-cost materials, such as paper tubes used in construction. With affordable tools like Dobson’s telescope, more amateurs today have the technology that is needed to make discoveries of their own.
1. How did Kathryn Gray discover the supernova?2. Why did Clyde Tombaugh get a job at the Lowell Observatory?
3. Please decide which part is false in the following statement, then underline it and explain why.
The four amateur astronomers were all interested in astronomy and did some research, so they finally made discoveries of their own.
4. Which of the amateur astronomers mentioned in the passage has impressed you most? Why? (about 40 words)
【推荐3】We have heard some interesting ways that 5G wireless technology might change our lives in the future.
5G, short for the 5th generation mobile communication technology, promises Internet speeds between 50 to 100 times faster than current 4G systems. While 5G is set to be used in some limited areas of America this year, much of the world is not expected to receive widely available service until 2023.
One project in Britain, however, is already testing this superfast technology on an unlikely group of Internet users — cows. The project was developed by American technology company Cisco Systems, Inc. It also receives money from the British government. Cisco says the program seeks to explore the future of 5G connectivity in rural areas around the world.
Testing areas were set up at farms in three rural areas of England. The cows are equipped with 5G-connected devices(装置) that link up to a robotic milking system, which uses sensors and machine learning to fully automate the process. System designers say technology takes over after a cow feels ready to be milked and walks toward an automatic gate. The device is designed to recognize each individual cow. It then positions equipment to the right body position for milking. During the process, machines release food for the cow as a reward.
Other 5G technology tools include automated brushes that turn on when the cow rubs (蹭) up against them. Sensors also control the amount of light to the cows’ living areas depending on the weather. And, an automatic feeding system makes sure the animals always get enough to eat.
Duncan Forbes, head of the project, told Reuters that the project shows the farm’s cow operations can be greatly improved with 5G technology and that the experiment provides strong evidence that 5G technology can be widely used in the future, not just on farms in Britain, but in rural communities across the world.
1. What is the purpose of Cisco Systems, Inc.’s project?| A．To win financial support from British government. |
| B．To test the effects of 5G technology on animals. |
| C．To promote its technological development in Britain. |
| D．To expand the future use of 5G in rural communities. |
| A．The project. | B．The company. |
| C．The technology. | D．The group. |
| A．It is no worse than 4G in terms of speed. |
| B．It is already widely available in the world. |
| C．It has made improvement in operating the cows. |
| D．It is based on sensors and machine learning. |
| A．Entertainment. | B．Lifestyle. | C．Education. | D．Technology. |
The device connects to a person’s knee. As the person walks ,the device captures energy each time the person slows down. To do this ,the device helps with the slowing sown movement of the leg, the movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also he used in hospitals to operate heart pacemakers(起博器), it could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, but the researchers hope to make a lighter, less costly version, An improved version should be ready in one year.
The developers hope the device will one day help developing countries; nearly twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania, He created a bag carried on a person’s back that also produces power from walking. The knee device does not produce as much electricity as the bag, but the bag requires the walker to carry a load of twenty to thirty kilograms.
1. The second paragraph mainly talks about
| A．who developed the device |
| B．how the device works |
| C．several possible uses for the devices |
| D．how much electricity the device can produce |
| A．It is too heavy for the walker to bear |
| B．It is too complex for people to use |
| C．It is too expensive for most people to afford |
| D．It will slow down one’s walking speed |
| A．produces power without adding more loads to the walker |
| B．can produce more power in a much shorter time |
| C．needs to be equipped with a battery |
| D．can help the walker walk faster |
| A．help housewives operate the washing machine |
| B．make it much easier for us to go online |
| C．produce more electricity than that invented by Larry Rome |
| D．be applied in medical fields to operate heart pacemakers |
| A．First device powered by walking will soon be on the market |
| B．Advanced technology brings in a new way to operate heart pacemakers |
| C．Device gives new meaning to the idea of power walking |
| D．Human energy will become a main source of electricity |
【推荐2】LONDON — A British judge on Thursday sentenced a businessman who sold fake bomb detectors (探测器) to 10 years in prison, saying the man hadn’t cared about potentially deadly consequences.
It is believed that James McCormick got about $ 77.8 million from the sales of his detectors — which were based on a kind of golf ball finder — to countries including Iraq, Belgium and Saudi Arabia. McCormick, 57, was convicted of cheats last month and sentenced Thursday at the Old Bailey court in London.
“Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people,” Judge Richard Hone told McCormick. “You have neither regret, nor shame, nor any sense of guilt.”
The detectors, sold for up to $ 42, 000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they “lacked any grounding in science” and were of no use.
McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.
“I never had any bad results from customers,” he said.
1. Why was McCormick sentenced to prison?| A．He sold bombs. |
| B．He caused death of people. |
| C．He made detectors. |
| D．He cheated in business. |
| A．increased the cost of safeguarding |
| B．lowered people’s guard against danger |
| C．changed people’s idea of social security |
| D．caused innocent people to commit crimes |
| A．They have not been sold to Africa |
| B．They have caused many serious problems. |
| C．They can find dangerous objects in water. |
| D．They don’t function on the basis of science. |
| A．sold the equipment at a low price |
| B．was well-known in most countries |
| C．did not think he had committed the crime |
| D．had not got such huge profit as mentioned in the text |
【推荐3】In Europe, men do not usually wear skirts. But the Scottish national clothing for men is a kind of skirt. It is called a kilt. The Scottish like to be different. They are also proud of their country and its history, and they feel that the kilt is part of that history. That’s why the men still wear kilts at traditional dance and on national holidays. They believe they are wearing the same clothes that Scottish men always used to wear.
That’s what they believe. However, kilts are not really so old. Before 1703, Scottish men wore a long shirt and blanket around their shoulders. These clothes got in the way when the men started to work in factories. So in 1730 a factory owner changed the blanket into a skirt — the kilt. That’s how the first kilt was made.
Then in the late 1700s Scottish soldiers in the British Army began to wear kilts. One reason for this was national feelings: The Scottish soldiers wanted to be different from the English soldiers. The British Army probably had a different reason: A Scottish soldier in a kilt was always easy to find! The Scottish soldiers fought very hard and became famous. The kilt was part of the fame, and in the early 1800s men around Scotland began to wear kilts.
These kilts had colorful stripes (条纹) going up and down and across. In the 1700s and early 1800s, the color of the stripes had no special meaning. Men sometimes owned kilts in several different colors. But later the colors became important to the Scottish families. By about 1850, most families had special colors for their kilts. For example, men from the Campbell family had kilts with green, yellow and blue stripes. Scottish people often believe that the colors of the kilts are part of their family history. In fact, each family just chose the color they liked best.
This is not the story you will hear today if you are in Scotland. Most Scottish people still believe that kilts are as old as Scotland and that the colors are as old as the Scottish family. Sometimes feelings are stronger than facts!
1. Scottish soldiers were dressed in kilts partly because of .| A．the colors | B．the weather | C．the feelings toward nation | D．the design |
| A．The English soldiers were the first to wear kilts. |
| B．Colors are not specially designed in the first kilts. |
| C．It was hard then to tell the Scottish soldiers from the English ones. |
| D．The factory owner made the first kilt from long shirts to make his workers different. |
| A．not part of the Scottish family history | B．older than the Scottish family history |
| C．for the Campbell family only | D．mainly green, yellow and blue |
| A．the European people are full of strong feelings |
| B．there are no stories about kilts in Scotland today |
| C．the British like to do things not on facts |
| D．the Scottish prefer to keep their tradition rather than believe the fact |
【推荐1】When the Normans built their first simple wooden castles in England, they built them on the top of small hills.The first permanent castles were made of stones and built with thick walls.The main building was usually surrounded by walls which overlooked the moat (护城河).
The entrance to the castle was usually over a drawbridge (吊桥)leading to the main gatehouse.The drawbridge could be raised or lowered and an iron grille (栅栏)could be lowered to shut off the entrance to the gatehouse.
As time went on, the castle builders became more advanced in their techniques.Instead of building a strong central building and surrounding it with walls of lesser strength，they thought out the idea of surrounding a central area with huge walls which could contain all the main rooms of the castle.These walls usually had many towers and these towers were really a series of main buildings along the castle walls.In building these castles they used hill sites whenever possible in order to give the castle a better position.Because the outside world was shut off by a barrier or curtain of defences, they are called “curtain wall” castles.
With the passing of time there was less need to build strong castles and nobles built manor(庄园)houses.These manor houses often had battlements and iron grilles, but they were built more for comfort and included many of the conveniences and luxuries of the large houses which were being built in the towns.
Unfortunately, many English castles were damaged or destroyed completely during the Civil Wars of the 1600s.
1. What is the best title for this passage?| A．How to build castles. |
| B．How to protect castles. |
| C．The history of English castles. |
| D．The structure of English castles. |
| A．the first simple wooden castles in England were built by the Normans. |
| B．old castles in England were all built on the top of hills. |
| C．the iron drawbridge was the only way to reach the main gatehouse. |
| D．“curtain wall” castles used curtains as their walls. |
| A．A Manor. | B．An iron grille. | C．A thick wall. | D．A central keep. |
| A．Most of English castles became manor houses now. |
| B．The Civil Wars left many English castles in ruins. |
| C．English castles were too strong to be destroyed. |
| D．Nobles built manor houses in order to defend their fortune. |
【推荐2】A team of farmers, university researchers and environmentalists is busy at work in the wetlands of eastern England. They are digging into the area’s wheat fields, looking for wet earth that could hide lost ponds underneath. It takes the group of diggers just a few hours to revive (使复活) one dying pond. It’s near Hindolveston, a thousand-year-old village close to the North Sea.
“As soon as the buried ponds get water and light, they just spring to life,” says Nick Anema, a farmer in nearby Dereham. He’s brought seven ponds on his farm back to life. “Frogs and all the insects like dragonflies can be seen here again,” he said.
But the battle for the wetlands is a struggle. While efforts to stop losses are continuing, wetlands around the world are still being filled in and covered up. Over the past three centuries, almost 90% of the world’s wetlands have disappeared. The loss rate has increased since the 1970s, with wetlands now disappearing three times faster than, the world’s forests.
Some 5,000 wetland-dependent animal species could die out because of such losses. Wetland loss can also affect human beings. Wetlands act as natural storage areas for water. Losing those areas could lead to more severe flooding in many parts of the world. And the act of removing water from wetlands can release huge amounts of carbon dioxide, a major contributor to climate change.
Human-made wetlands, however, aren’t decreasing in number. Rice fields, water reservoirs and agricultural stock ponds have all increased since the 1970s. Yet scientists are concerned about this phenomenon. “People brag (自夸) about the fact that there’s been no net loss (净损失) of wetlands. But what they’ve done is destroy natural wetlands and create artificial ones,” says Stuart Pimm, a Duke University professor. “It makes it look like you’re doing no harm when the reality is very different.”
1. What’s the team’s work in eastern England intended for?| A．Digging wet earth for research. | B．Researching into an old village. |
| C．Bringing dying ponds back to life. | D．Finding wetlands created by people. |
| A．Various functions of wetlands. | B．Serious consequences of wetland loss. |
| C．Wetlands’ key role in climate change. | D．Wetlands’ importance to living things. |
| A．Artificial wetlands can’t replace natural ones. |
| B．Creating artificial wetlands upsets the balance of nature. |
| C．Keeping the total number of various kinds of wetlands is important. |
| D．It’s important to balance the numbers of natural wetlands and artificial ones. |
| A．Seeking for More Wetlands | B．Saving the World’s Wetlands |
| C．Causes of Wetlands’ Disappearance | D．Natural Wetlands vs. Artificial Wetlands |
【推荐3】Over 30 years of camping vacations, Russ Fee had never experienced or heard of a wolf attack. That changed last August while he was camping with his wife and two sons at Banff National Park. At around midnight, Fee woke to the sound of panicked voices calling for help. He knew there was another family with two sons, aged five and seven, at the next campsite, and went to investigate.
As Fee approached, he caught sight of an animal's rear legs protruding from a collapsing tent ----legs too large to belong to a dog. Fee ran up and kicked the animal. Startled, it backed out of the tent. Suddenly, Fee was standing face-to-face with a wolf. “That was a terrifying moment,” he recalls. Matt Rispoli, the neighbouring dad, jumped out of the collapsed tent covered in blood. Moments earlier, the wolf had bitten through the tent, puncturing his arm and tearing the material. Both men shouted and threw rocks at the wolf to scare it away.
The wolf backed off long enough for the Rispolis to pile into the Fees’ van. Since there was no cell service, Fee drove the family to a nearby hotel, where staff called 911. Rispoli, who only needed stitches, was grateful for Fee coming to his family’s rescue. The Park Personnel euthanized（使安乐死）the wolf later that night ---- the rare attack was likely because the wolf was near starvation.
The Fees still kept in touch with the Rispolis over Facebook and even exchanged Christmas gifts last year. “It easily could have been my family who got attacked,” says Fee. “We were all fortunate in the end.”
1. What did Russ Fee experience last August at Baff National Park?| A．He experienced a wolf attack while camping there. |
| B．He camped there with his family and some friends. |
| C．He woke up the family camping at the next campsite. |
| D．He made investigations to the park after hearing the sound. |
| A．The Rispolis were throwing rocks at the wolf |
| B．The Rispolis were biting and tearing the tent |
| C．Matt was standing in front of the wolf |
| D．Matt got injured and was bleeding |
| A．The workers at the park drove the Rispolis to a nearby hotel. |
| B．Fee was very brave and felt excited when facing the wolf. |
| C．The Fees thought they were unlucky to meet the Rispolis. |
| D．A wolf attack seldom happens at Baff National Park. |
| A．A terrible wolf attack at Baff National Park. |
| B．An unexpected reunion with the Rispolis. |
| C．An unforgettable camping experience. |
| D．A starving wolf at Baff National Park. |
