1 . When John Todd was a child, he loved to explore the woods around his house, observing how nature solved problems. A dirty stream, for example, often became clear after flowing through plants and along rocks where tiny creatures lived. When he got older, John started to wonder if this process could be used to clean up the messes people were making.
After studying agriculture, medicine, and fisheries in college, John went back to observing nature and asking questions. Why can certain plants trap harmful bacteria (细菌)? Which kinds of fish can eat cancer-causing chemicals? With the right combination of animals and plants, he figured, maybe he could clean up waste the way nature did. He decided to build what he would later call an eco-machine.
The task John set for himself was to remove harmful substances from some sludge (污泥). First, he constructed a series of clear fiberglass tanks connected to each other. Then he went around to local ponds and streams and brought back some plants and animals. He placed them in the tanks and waited. Little by little, these different kinds of life got used to one another and formed their own ecosystem. After a few weeks, John added the sludge.
He was amazed at the results. The plants and animals in the eco-machine took the sludge as food and began to eat it! Within weeks, it had all been digested, and all that was left was pure water.
Over the years, John has taken on many big jobs. He developed a greenhouse — like facility that treated sewage (污水) from 1,600 homes in South Burlington. He also designed an eco-machine to clean canal water in Fuzhou, a city in southeast China.
“Ecological design” is the name John gives to what he does. “Life on Earth is kind of a box of spare parts for the inventor,” he says. “You put organisms in new relationships and observe what’s happening. Then you let these new systems develop their own ways to self-repair.”
1. What can we learn about John from the first two paragraphs?| A．He was fond of traveling. | B．He enjoyed being alone. |
| C．He had an inquiring mind. | D．He longed to be a doctor. |
| A．To feed the animals. | B．To build an ecosystem. |
| C．To protect the plants. | D．To test the eco-machine. |
| A．To review John’s research plans. | B．To show an application of John’s idea. |
| C．To compare John’s different jobs. | D．To erase doubts about John’s invention. |
| A．Nature can repair itself. | B．Organisms need water to survive. |
| C．Life on Earth is diverse. | D．Most tiny creatures live in groups. |
2 . Science reporting on climate change does lead Americans to adopt more accurate beliefs and support government action on the issue, but these gains are fragile, a new study suggests. Researchers found that these accurate beliefs fade quickly when people are exposed to coverage skeptical of climate change.
“It is not the case that the American public does not respond to scientifically informed reporting when they are exposed to it,” said Thomas Wood, associate professor of political science at the Ohio State University. “But even truly accurate science reporting recedes from people’s frame of reference very quickly.”
Results showed that accurate science reporting didn’t persuade only politicians and people who initially rejected human-caused climate change also had their opinions shifted by reading accurate articles. The study involved 2,898 online participants who participated in four waves of the experiment during the fall of 2020.
In the first wave, they all read authentic articles in the popular media that provided information reflecting the seientifie views on climate change. In the second and third waves, they read either another scientific article, an opinion article that was skeptical of climate science, or an article on an unrelated subjeet. In the fourth wave, the participants simply were asked their beliefs about the science of climate change and their policy attitudes.
To rate participants’ scientific understanding. the researchers asked after each wave if they believed that climate change is happening and has a human cause. To measure their attitudes, researchers asked participants if they favored government action on climate change and if they favored renewable energy.
“What we found suggests that people need to hear the same accurate messages about climate change again and again. If they only hear it once, it recedes very quickly,” Wood said. It was significant that accurate reporting had positive effects on all groups, including those who originally rejected climate change. But it was even more encouraging that it affected attitudes.
1. What does the underlined word “recedes” in paragraph 2 mean?| A．Increases. | B．Graduates. | C．Disappears. | D．Strikes. |
| A．The research object. | B．The research result. |
| C．The research purpose. | D．The research procedure. |
| A．To survey the government’s satisfaction rate. |
| B．To make an assessment on their attitudes. |
| C．To teach them scientific understanding. |
| D．To measure action on climate change. |
| A．Science Report Of Climate Change Can Affect Minds |
| B．Online Participants Joined In A Four-Wave Experiment |
| C．Accurate Science Reporting Don’t Persuade Only Politicians |
| D．People Should Hear Accurate Messages About Climate Change |
3 . Throughout history, many species of animals have been threatened with extinction. When Europeans first arrived in North America, more than 60 million buffalo (水牛) lived on the continent. Yet hunting the buffalo was so popular during the 19th century that by 1900 the animal’s population had fallen to about 400 before the government stepped in to protect the species. In some countries today, the elephant faces a similar challenge, as illegal hunters kill the animals for the ivory in their tusks.
Yet not all animals with commercial value face this threat (威胁).The cow, for example, is a valuable source of food, but no one worries that the cow will soon be extinct. Why does the commercial value of ivory threaten the elephant. while the commercial value of beef protects the cow?
The reason is that elephants are a common resource, while cows are private goods. Elephants wander freely without any owners. The hunter has a strong motivation to kill as many elephants as he can find. Because illegal hunters are numerous, each has only a slight motivation to preserve the elephant population. By contrast, cattle live on farms that are privately owned. Each farmer makes great effort to maintain the cattle population on his farm because he harvests the benefit of these efforts.
Governments have tried to solve the elephant’s problem in two ways. Some countries, such as Kenya and Uganda, have made it illegal to kill elephants and sell their ivory. Yet these laws have been hard to put into effect, and elephant populations have continued to dwindle. By contrast, other countries, such as Malawi and Namibia, have made elephants private goods and allowed people to kill elephants, but only those on their own property.
With private ownership and the profit motive now on its side, the African elephant might someday be as safe from extinction as the cow. The ancient Greek philosopher Aristotle pointed out the problem with common resources: “What is common to many is taken least care of, for all men have greater regard for what is their own than for what they possess in common with others.”
1. Why does the author mention buffalo in paragraph 1?| A．To introduce a similar threat to elephants. |
| B．To provide an example of species extinction. |
| C．To offer an explanation for government policies. |
| D．To present the statistics of the buffalo in America. |
| A．They are under different law protection |
| B．They attract different groups of hunters |
| C．They contain different commercial value |
| D．They represent different ownership types |
| A．Bans on killing elephants for ivory |
| B．Effective laws for elephant protection. |
| C．Methods of making elephants private goods |
| D．Government policies on the elephant’s problem |
| A．People hold little regard for others’ property |
| B．People want to profit from common resources |
| C．People care more about their own possession |
| D．People tend to take what they own for granted |
4 . Dogs may have earned the title of our best friends through their interactions with humans, but now researchers say these social skills could, be present shortly after birth rather than being learned.
To better understand the role of biology in dogs’ abilities to communicate with humans, the researchers studied 375 eight-week-old service dogs. They looked at how these dogs performed in a series of tasks designed to measure their communication skills. The puppies were still living with their littermates (同窝出生者) and had not been sent to live with a volunteer puppy raiser, making it unlikely that they had learned about his or her behavior.
In the first task, a person hid a treat beneath one of two overturned cups and pointed to it to see if the puppy could follow the gesture. Since dogs are good at using noses to find things a treat was also taped to the insides of, both cups. In the second task, puppies watched as the researchers placed a yellow, block next to the correct cup, instead of pointing to indicate where the puppy should look for the food.
The third task was designed to observe puppies’ tendency to look at human faces. The researchers spoke to the puppy in a voice people sometimes use when talking to a baby. They then measured how long the puppy fixed a stare on the human.
In the last task, researchers sealed a treat inside a closed container and presented it to the puppy. They then measured how often the puppy looked to the human for help in opening the container.
The study found that while many of the puppies were responsive to humans’ physical and verbal cues, very few looked to humans for help with the unsolvable task. Researchers said, “This suggests that while puppies may be born knowing how to respond to human-initiated communication, the ability to initiate communication on their own may come later.” The next step will be to see if specific genes that may contribute to dogs’ abilities to communicate with humans can be identified.
1. Why were eight-week-old service dogs chosen for the study?| A．They were the best age to learn. |
| B．They were cute and safe to deal with. |
| C．They were unlikely influenced by their mates. |
| D．They had had little contact with humans before. |
| A．To provide clues for the puppies’ final decisions. |
| B．To make comparisons between different conditions. |
| C．To prevent the puppies from making use of their smell. |
| D．To check the puppies’ preference for a particular color. |
| A．Puppies can understand our body language. |
| B．Puppies are good at asking humans for help. |
| C．Puppies are born to arouse communication with humans. |
| D．Puppies need specific genes to communicate with humans. |
| A．Dogs—talented performers | B．Dogs—humans’ best friends |
| C．Dogs—born to be able to learn | D．Dogs—born to understand humans |
Researchers say they have found microplastics (微塑料) -tiny pieces of plastic that come as a result of the disposal of industrial waste-deep in the lungs of living
The research, which
In the study, researchers
The study notes
The world produces about 300 million metric tons of plastic a year and about 80% ends
In a world that is full of different kinds of colors, red quite stands out. In China, people call this color China Red,
This expression fully shows Chinese people’s special love for red. So why are the Chinese really fond of it? One reason
In a word, red is popular in China and it’s more than just a color. It carries the rich culture of this nation. And you’re welcome
7 . It is late autumn—millions of gardeners across the northern hemisphere, pulled on their thickest sweaters, spent hours clearing large piles of leaves and packed them into plastic bags at the end of driveways.
In the US alone, nearly 10 million tonnes of garden waste go to landfill every year. That is a large amount of effort, not just from an environmental viewpoint but from that of our aching backs, too. So where does this advice come from? Well, it largely comes from the belief that thick fallen leaves can make plants under them unable to breathe, especially shorter grass. They shut down important photosynthesis (光合作用) and get in the way of the growth of the shorter grass. However, this received wisdom has recently been questioned by researchers at Wisconsin University.
The key finding of their new research was that although clearing fallen leaves is one of the most common gardening practices, it makes very little sense. In natural ecosystems, fallen leaves help return nutrients necessary for healthy plant growth to the soil, which greatly improves soil condition. Removing leaves year after year breaks this ecological (生态的) balance. Letting some leaves stick around to cover your garden is a great way to help your grass and the local ecosystem.
They further explained that if up to 50percent of your grass lawn (草坪) is covered by fallen leaves, you might as well go back indoors and put your feet up. The advantages of this light leaf coverage far outweigh the disadvantages—the leaves will quickly break down and help next year’s lawn grow far better than if you had cleared them. Only at over 50 percent coverage do the Wisconsin researchers recommend clearing.
So why not consider leaving the leaves? Save time, carbon and effort, and in exchange get a healthier lawn from this garden waste—that seems like a pretty good deal. And how many plastic bags could be saved by simply not binning fallen leaves every year? In the US alone, about 700 million.
1. What does the author describe in paragraph 1?| A．An amazing autumn game. | B．A common sight in gardens. |
| C．A hot attraction in the north. | D．An extreme weather event. |
| A．Fallen leaves need not be cleared. |
| B．Fallen leaves protect shorter grass. |
| C．Fallen leaves block photosynthesis. |
| D．Fallen leaves are hard to break down. |
| A．it ruins city image | B．it breaks gardening rules |
| C．it affects local economy | D．it causes ecological damage |
| A．Doubtful. | B．Positive. | C．Unclear. | D．Worried. |
8 . New research from the University of Portsmouth has shown a marked increase in shipping in the North East Atlantic. Scientists now warn that more monitoring is required to help protect sea life.
Researchers at the University of Ponsmouth have discovered that rates (率) of shipping in the North East Atlantic area rose by 34 per cent in a five-year period. The research is the first detailed survey of shipping activity in the North East Atlantic. Researchers used data from over 530 million vessel (船) positions recorded by Automatic Identification System(AIS). They looked at the change in shipping between 2013 and 2017 across ten different vessel types. In total the study area covered 1.1 million km², including waters off Belgium, Denmark, France, Germany,Iceland, Ireland, The Netherlands, Norway, Portugal. Spain, and the UK.
Lead author, James Robbins said: “This change is likely to put more pressure on the marine (海洋的) environment, and may influence the protection of at-risk species. Renewed monitoring effort is needed to make sure that protective measures are enough to save species under threat in a changing environment.”
Some of the greatest shipping increases were found in areas close to the Spanish coast. The Espacio Marino de la Costa da Morte saw a rise of 413 percent in vessel activity. It is an area used to protect seabirds.
Dr. Sarah Marley, Visiting Researcher at the University of Portsmouth, said: “Shipping is the most widespread human activity in our oceans, carrying a set of threats-from unnoticeable effects like underwater noise pollution to serious results when ships hit whales.”
Professor Alex Ford. from the University’s Institute of Marine Sciences, said: “Given the well-documented effects that shipping can have on the marine environment, it is necessary that this situation continues to be monitored-particularly in areas used to protect vulnerable (脆弱的) species which may already be under pressure.”
1. What can we say about the new research?| A．It started in 2013. | B．It is the first of its kind. |
| C．It was carried out by AIS. | D．It covers the whole Atlantic. |
| A．Rapid population growth. |
| B．Rising global temperatures. |
| C．The huge increase in shipping. |
| D．The disappearance of marine life. |
| A．Shipping plays an important role in the local economy. |
| B．Shipping can be a danger to the marine environment. |
| C．Noise pollution is closely related to human activity. |
| D．Marine areas should be monitored more carefully. |
| A．New waterways across the Atlantic |
| B．The shipping industry in the North East Atlantic |
| C．New research opens windows into life under the water |
| D．Sea life needs better protection from an increase in shipping |
Astronomers have published a major finding
“Super unusual,” said Yvette Cendes, an astronomer at Harvard. “We’ve never really seen this before to this degree.”
Researchers made the
What they found was that one of the TDEs was emitting energy at an unusual speed
This behavior is different from what has been observed in black holes before, in two ways. First, the timing: it’s more common
In most cases of black holes swallowing stars, perhaps 99%, the outflow is lower in energy. And in 1% of cases, that outflow, at about half the speed of light, rarely
When I was admitted to the University of Alabama, I decided to get a puppy. So I adopted an adorable Golden Retriever(金毛猎犬) puppy against my parents’ wishes.
Soon, I realized my parents were right. The dog was so naughty that it caused me a lot of trouble every day. In fact, she soon earned the nickname(绰号) Bella the Devil at school.
However, as time went by, she taught me how to be a better dog mom, and I taught her how to be a better dog. We became best friends and did everything together. Bella was there for me all the time: parties, restaurants, games, even dates! We loved spending time together. By the time I was a senior, Bella and I developed a stronger relationship. She was truly my best friend.
In the third year, I worked at the local college l bar not far from the house. One night, I was running late. Bella and I had been with friends down the street when I realized it was already 9:00 p.m. We had to rush home so I could make it to work by 9:30. I ran through the front door and jumped to the bathroom to have a shower. Bella followed me into the bathroom and lay in her usual place on the bathroom floor. Then I heard my front door open. It was so loud that I thought it was strange. It couldn’t be my roommate for she had flown to New York. I turned off the shower and yelled her name. No answer.
注意:
1.续写词数应为150左右；
2.请按如下格式在答题卡的相应位置作答。
Instantly(立刻), I knew something was seriously wrong.
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Then I went outside to find Bella with the policemen.
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