1 . A new study by researchers at the University of British Columbia (UBC) and the University of Victoria has shown that common levels of traffic pollution can damage human brain function in only a matter of hours.
“For many decades, scientists thought the brain may be protected from the harmful effects of air pollution,” said senior study author Dr. Chris Carlsten. “This study, which is the first of its kind in the world, provides fresh evidence supporting a connection between air pollution and cognition.”
For the study, the researchers briefly exposed 25 healthy adults to diesel exhaust (柴油废气) and filtered air at different times in a laboratory setting. Brain activity was measured before and after each exposure using functional magnetic resonance imaging (fMRI).
The researchers analyzed changes in the brain’s default mode network (DMN), a set of inter-connected brain regions that play an important role in memory and internal thought. The fMRI revealed that participants had decreased functional connectivity in widespread regions of the DMN after exposure to diesel exhaust, compared to filtered air.
“We know that altered functional connectivity in the DMN has been associated with reduced cognitive performance and symptoms of depression, so it’s concerning to see traffic pollution interrupting these same networks,” said Dr. Jodie Gawryluk, a psychology professor at the University of Victoria and the study’s first author. “While more research is needed to fully understand the functional impacts of these changes, it’s possible that they may impair (损害) people’s thinking or ability to work.”
Notably, the changes in the brain were temporary and participants’ connectivity returned to normal after the exposure. Dr. Carlsten assumed that the effects could be long lasting where exposure is continuous. He said that people should be mindful of the air they’re breathing and take appropriate steps to minimize their exposure to potentially harmful air pollutants like car exhaust.
1. How does traffic pollution affect people according to the study?| A．Exhausting their body. | B．Decreasing their income. |
| C．Endangering their safety. | D．Harming their brain function. |
| A．Growth. | B．Sport. | C．Memory. | D．Behaviour. |
| A．Avoid being exposed to the polluted air constantly. |
| B．Be mindful of the air quality in a new city. |
| C．Measure the brain activity in laboratories. |
| D．Stay inside a house as often as possible. |
| A．A Role Of Brain Will Be Ruined |
| B．Traffic Pollution May Impair Brain Function |
| C．A Famous UK University Did A Vital Study |
| D．A Source Of Pollution Has Drawn People’s Attention |
2 . At ancient sites across the Amazon River basin, mysterious plots of unusually rich soil dot (点缀) the landscape. Scientists have long debated the origin of this “dark earth”, which is darker in color than surrounding soils and richer in carbon. Some people think this dark earth formed naturally, but the latest research has shown that modern Kuikuro people in Brazil create similar soil around their villages on purpose, which adds evidence to the idea that long-ago Amazons deliberately made such soil too. Perron, an earth scientist at MIT, reviewed interviews of Kuikuro people conducted by a Kuikuro filmmaker in 2018 and found that Kuikuro villagers actively make dark earth by using ash, food bits and controlled burns. “When you plant in hilly land, the soil is weak,” explained elder Kanu Kuikuro in one of the interviews. That is why we throw the ash, manioc peelings and manioc pulp. When comparing soil samples from ancient and modern sites, researchers found “striking similarities” — both were far less acidic than surrounding soils and contained higher levels of plant-friendly nutrients.
Analyses also revealed that dark earth holds twice the amount of carbon as surrounding soils on average. Scans (扫描) of the Xingu region suggest that the area is dotted with dark earth, and that hold as much as about 9 million tons of carbon — the annual carbon emissions of a small, industrialized country. “This number could roughly equal the annual carbon emissions of the United States when all dark earth across the Amazon is taken into consideration,” Perron says.
Figuring out the true value of carbon stored in the Amazon’s dark earth will require more data. Still, the research has significant influences on the Amazon’s future. The technique highlights how ancient people were able to live in the Amazon by developing sustainable farming that doubled as a carbon-storing technique. With more and more greenhouse gases entering the atmosphere, it could also provide a blueprint for developing methods of sustainably locking atmospheric carbon in the soil, helping fight climate change.
1. What can we infer from the dark earth across the Amazon River basin?| A．They are more acidic than surrounding soils. |
| B．They contain more organic nutrients. |
| C．They formed naturally. |
| D．They contain less carbon. |
| A．To explain the difficulty of protecting dark earth. |
| B．To show the wide distribution of dark earth in Amazon. |
| C．To stress the huge carbon-storing capability of dark earth. |
| D．To reveal the large carbon emissions of the United States. |
| A．The importance of developing sustainable farming. |
| B．The advanced farming technology in ancient tomes. |
| C．A possible solution to climate change. |
| D．A way of green agriculture. |
| A．Urgency of Sustainable Development | B．Facts About the Dark Earth |
| C．Advantages of the Dark Earth | D．Wisdom of Ancient Amazons |
3 . Some of the oldest living things on our remarkable planet are trees. The record holders are bristlecone pines (狐尾松) of the western United States, quite a few of which are known to be more than 3,000 years old. One individual, discovered in 2012, is estimated to be more than 5,060 years old, making it the oldest known non-clonal tree in the world!
So, how do trees survive for thousands of years?
The other part of the answer has to do with how trees age. In fact, there is quite a debate about whether ancient trees can be considered “immortal (永生的)”. That is, will such trees ever die if they are not killed by an outside force? We may never know the answer to that, but, at the very least,
Older trees benefit greatly from having bodies made mostly of dead woody tissue. In fact, an old tree might be as much as 95 percent dead tissue! Given that it isn’t alive, wood does not require metabolic (新陈代谢的) activity to maintain it,
| A．so an old tree doesn’t really need to do much to keep living |
| B．This is a question that has something to do with the good luck of trees |
| C．However, bristlecones are certainly not alone in terms of the oldest creatures |
| D．This is a fascinating question for biologists that does not yet have a settled answer |
| E．What’s more, some ancient trees have superior chemical defenses against pests and diseases |
| F．which means that trees can survive everywhere without being limited by external and internal conditions |
| G．we know that ancient trees age in ways that are dramatically different from the ways that most animals and even other plants age |
4 . In the past months, humans have become quite familiar with the term “social distancing”. But it turns out that we are not the only ones to avoid contacting our peers when our health may be at risk. Research suggests honeybees do it, too. “It’s exciting to see that other animals are doing something analogous,” said Dr. Alessandro Cini, co-author of the research at University College London.
Scientists have found that when a hive of honeybees is under threat from the mite called Varroa destructor, which can cause the collapse of honeybee colonies, the bees will respond by changing the way they interact with one another.
By examining videos recorded inside the hives, the researchers found that when hives had mites, foraging bees performed important dances to indicate the direction of food sources and kept themselves away from the centre of the colony where young bees and the queen stayed. This may help to keep the infection at a level that can be controlled, limiting the amount of damage. “Foragers are one of the main entrance routes for the mites,” said Cini.
The team then carried out experiments in the laboratory, artificially infecting small groups of about 12 young bees with the mites and comparing them to uninfected groups. This time, the team found no increase in social distancing among infected groups which, says Cini, may reflect that it is more important for foragers and young bees to keep their distance when the mites are present, and that bees rely on one another.
“Probably social distancing is too costly on a small scale,” he said. But there were differences in grooming behaviour: Infected bees were groomed more, inspected more, and had food shared with them more than individuals in uninfected groups.
Cini said the study showed the power of natural selection in the evolution of social behavior and also dynamic change in the social behaviour to adapt to an ever-changing environment.
1. What does the underlined word “analogous” in Paragraph I probably mean?| A．Similar. | B．Adventurous. | C．Meaningful. | D．Creative. |
| A．To quickly locate food. | B．To show respect for the queen. |
| C．To minimize the potential risk. | D．To shorten the time to look for food. |
| A．Social distancing happens between infected groups. |
| B．Infected honeybees were given more attention. |
| C．Younger honeybees were safe from infection. |
| D．Honeybees depend on the queen to survive. |
| A．Bees’ behavior when they are under threat. | B．Bees’ communication when they are under threat. |
| C．The social distancing between human and honey bees. | D．The social distancing in honey bees’ world. |
5 . When wildfire smoke from huge fires in Canada blanketed the US in the summer of 2023, emergency rooms saw an increase in admissions for lung problems, heart attacks and other health issues.
Burning fossil fuels has driven climate change, and now climate change is costing people their health and increasingly their lives, says a new report from the medical journal The Lancet. The eighth annual Lancet Countdown, an international analysis that tracks nearly 50 different health-focused issues affected by climate change, calls for an immediate wind-down of fossil fuel use.
Those with the least historical responsibility for causing climate change are feeling the worst effects. Pakistan—a country responsible for roughly 0.3% of all climate-change-causing carbon emissions, suffered huge floods in 2022 that displaced more than 30 million people and killed at least 1,700. However, wealthier countries cannot be spared. In the US, wildfire smoke this summer sent people to the emergency room from New York to Georgia. In Europe, a 2022 summer heat wave resulted in over 60,000 deaths.
About one fifth of all US residents work outdoors; the percentages are even higher in many other countries. When it gets too hot, it gets harder and harder to work. Last year, the report says, outdoor workers lost more than 140 hours each — or several weeks of pay — because of the intense heat.
The human and economic costs are forecast to grow with every tenth of a degree hotter the planet gets. Heat-related deaths, for example, could increase by nearly five times by the middle of the century, if without immediate reductions to carbon emissions.
“I have a young patient who presents with uncontrollable asthma. She lives right next to a highway and is breathing in harmful air from cars burning gas,” Renee Salas, a doctor at Harvard’s Chan School of Public Health says. “So the treatment she needs is electric vehicles, home weatherization and air purification. These are prescriptions I can’t write.”
1. What can be learned from paragraph 3?| A．The wildfire has burned large areas of forest. | B．Pakistan is largely responsible for climate change. |
| C．Climate change has caused a lot of human deaths. | D．People in wealthier countries have good health care. |
| A．American residents worked very hard last year. |
| B．There is nothing people can do about climate change. |
| C．The economy has also been affected by climate change. |
| D．Heat-related deaths will double by the middle of the century. |
| A．She advocates green lifestyle. | B．She prefers to drive an electric car to work. |
| C．Young people are more likely to get asthma. | D．Hospitals are short of medicines to treat asthma. |
| A．The advantage of living in the US. | B．The cause of climate change. |
| C．The stress of working outdoors. | D．The harm of climate change. |
6 . 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 |
7 . Every year, as the surface water temperature off the United States mid-Atlantic coast rises steadily from late spring through the summer, a pocket of uncharacteristically cool and crisp water gets trapped at the bottom of the ocean. Packed with nutrients this thick band of cold water, known as the mid-Atlantic cold pool, is a vital home for shellfish species. Extending at its seasonal peak from Nantucket, Massachusetts, to Cape Hatteras, North Carolina, the cold poll creates a diverse ecosystem ranging from algae(海藻)to fish — and some of the most valuable shellfish fisheries in the United States.
Now, however, two pressures have scientists worrying about whether the cold pool will last. The first is no surprise: climate change. Over the past five decades, climates change has destabilized the cold pool, causing it to warm and shrink. Compared with 1968, the cold pool is now 13℃ warmer and has lost more than one-third of its area.
The second concern is 1ess certain. In 2023, the US federal government approved plans to install(安装)98 wind turbines(涡轮机)off the New Jersey coast, covering an area of more than 300 square kilometers. Yet putting so many turbines to the seafloor could have unexpected consequences for the cold pool. That’s why Travis Miles, a researcher at New Jersey’s Rutgers University, and his colleagues are investigating. So far, Miles and his colleagues can’t definitively say what will happen to the cold pool, saying more research is needed to assess how climate change and offshore wind, together, could affect the cold pool. However, their initial analyses suggest the cold pool should be fine — at least in normal conditions.
New Jersey’s offshore wind plans are strongly opposed mainly by fossil fuel-industry funded efforts. Miles worries that an overabundance of caution or fear of potential impacts, including on the cold pool, might slow down the development of renewable energy. “...it’s quite clear that climate change is far more damaging than installing wind farms,” he says. “I don’t think any scientist would argue with that.”
1. What do we know about the mid-Atlantic cold pool?| A．It forms in early spring. | B．It’s a band of cold near-bottom water. |
| C．It serves as a habitat of most sea species. | D．It extends from Nantucket to New Jersey. |
| A．Break down. | B．Get polluted. | C．Dry up. | D．Become smaller. |
| A．supportive | B．dismissive | C．overcautious | D．skeptical |
| A．The Cold Pool Plays a Role on species |
| B．Opinions Divide on Offshore Wind Farms |
| C．Scientists Eye Potential Risks to the Cold Pool |
| D．Renewable Energy Helps to Race Against Climate Change |
8 . My first dependant was a duck called Mr. Kite. As a cream-faced four-year-old, it was my job at the nursery to turn the eggs in the incubator (恒温箱) every day: one side “O”, the other side “X”.
We lived in a small, inner-city house with a long, thin garden in east Oxford at the time. As a gentle-hearted vet's (兽医的) daughter, my mum couldn't resist adopting these ducks. I named them Buttercup, Mr. Kite and Drakey. We made them a pond. The bottom was a mosaic (马赛克) made from all the bits of plate and cup that had been broken during family rows. Within 30 seconds,the pond was so full of duck droppings that we never saw the mosaic again.
One of the most magical moments during my caring for ducks was the night it snowed. Mum, over whelmed by pity and grandmotherly concern, insisted that Mr. Kite and her friends — yes, Mr. Kite was female — be spared another freezing night in the wooden house my dad had built for them at the end of the garden; we caught them, flapping and shouting, and brought them in to sleep in the kitchen.Have you ever seen three ducks go wild in a tiny kitchen? It was one of the best moments of my childhood. It smelled like the underside of hell's socks by the time they had left.
I used to spend my summers lazing in a swimming pool with Mr. Kite and the others. Eventually, though, our neighbour complained that they were being woken at 4:45 a.m.. So, the feathered three went to live with an old couple in the country. Fair enough — you don't move to the city to have the dawn torn apart by quacking — although it must have made a change from student parties and the sound of 19-year-olds being sick by the bins.
I wonder now if this early experience of duck adoption is the reason that, at least three times a week, what ever the weather, you will find me swimming in the Thames or a nearby lake with the ducks. Although they never say hello.
1. Why were there marks of “O” and “X” on eggs?| A．To have fun. | B．To count the eggs. |
| C．To tell sides apart. | D．To distinguish males from females. |
| A．Family preference. |
| B．A nursery assignment. |
| C．The mother's occupation. |
| D．Neighbour' support. |
| A．The ducks' smells drove the author mad. |
| B．The energetic ducks brought much pleasure. |
| C．The ducks were hard to feed in cold weather. |
| D．The ducks were offered luxury accommodation. |
| A．Rejecting firmly. | B．Ignoring deliberately. |
| C．Explaining patiently. | D．Accepting unwillingly. |
9 . Since the 1950s, some 9.2 billion tonnes of plastic have been produced globally, of which only about 10% has ever been recycled. Yet environmentally conscious companies and consumers continue to look to recycling as a way to ease the plastic problem. Manufacturing giants claim to be committed to making more of their products and packaging from recycled materials. However, this confidence masks (掩饰) a complex web of issues around plastic recycling. Recycling rates remain extremely low and critics argue that we should look at alternative ways to tackle plastic pollution.
While many plastics have the potential to be recycled, most are not because the process is costly, complicated and the resulting product of a lower quality than the original. Despite rising demand for recycled plastic, few waste companies turn a profit. Part of this is because virgin plastic-linked to oil prices - is often cheaper than recycled plastic, meaning there is little economic incentive to use it. Worse yet, much of our plastic waste is difficult to recycle. Lightweight food packaging, like a mozzarella packet, contains different plastics, dyes and toxic additives (添加剂). This dirty mix means plastic recycled through mechanical methods- the most common form- can only be melted down and moulded (浇铸,塑造) again a couple of times before it becomes too fragile to be reused. And the nature of the process means plastic recycling has a carbon footprint of its own.
Given all of these difficulties, environmental critics say recycling is not the solution-and argue that creating more products from recycled material to attract environmental consciousness merely worsens the problem. “The solution is to use less plastic and to stop misleading the public about the recyclability,” says Enck, president of Beyond Plastics, a US campaign group with a mission to end single-use plastic. “They should stop making false claims about the recyclability of plastics since they know most will either be littered (乱扔) or burned or landfilled (填埋). Using less plastics means shifting to reusable products and relying more on paper, cardboard, glass and metal- -all of which should be made from recycled content.”
1. What is an environmentally conscious customer’s attitude towards recycling plastics?| A．Suspicious. | B．Favorable. | C．Indifferent. | D．Disapproving. |
| A．motive. | B．issue. | C．crisis. | D．policy. |
| A．The recycling process of plastics. | B．Pollutants contained in recycled plastics. |
| C．Reasons why users dislike recycled plastics. | D．Contributing factors to low plastic recycling rates. |
| A．Using metal or glass food containers. | B．Littering recycled plastics in a landfill. |
| C．Processing plastics in a mechanical way. | D．Launching campaigns to promote recyclability. |
10 . In parts of Africa, people communicate with a wild bird — the greater honeyguide-in order to locate bee habitats and harvest their stores of honey. It’s a rare example of cooperation between humans and wild animals, and a potential instance of cultural coevolution (共同进化). Brian Wood from UCLA and Claire Spottiswoode from University of Cape Town were lead authors on a study showing how this valuable partnership is maintained and varies across cultures.
“Our study demonstrates the bird’s ability to learn distinct voiced signals that are traditionally used by different honey-hunting communities, expanding possibilities for mutually beneficial cooperation with people,” Wood said. “Honeyguides seem to know the landscape well, gathering knowledge about the location of bee nests, which they then share with people,” Spottiswoode said. “People are eager for the bird’s help.” The honeyguides also benefit from locating the colonies: They eat the leftover honeycomb.
Spottiswoode and Wood’s study was done in cooperation with the Hadza in Tanzania, with whom Wood has been conducting research since 2004, and the Yao community of northern Mozambique. Their prior work in both communities documented differences in how each culture attracts honeyguides. Among the Hadza, a honey-hunter announces a desire to partner with the bird by whistling. In Mozambique, Yao honey-hunters do so with a “Brr!”... followed by a “...hmm!”
Using mathematical models and audio playback experiments, the team studied these signals, their usefulness to people and their impacts on birds. They experimentally exposed honeyguides in Tanzania and Mozambique to the same set of prerecorded sounds. This enabled the researchers to test whether honeyguides had learned to recognize and prefer the specialized signals that local honey-hunters used or were naturally attracted to all such signals.
The honeyguides in Tanzania were over three times more likely to cooperate when hearing the calls of local Hadza people than the calls of ‘foreign’ Yao. The honeyguides in Mozambique were almost twice as likely to cooperate when hearing the local Yao call, compared to the ‘foreign’ Hadza whistles.
The study proposes that differences in honeyguide-attracting signals are not random, but make practical sense. While honey-hunting, both the Hadza and Yao come across mammals (哺乳动物), but only the Hadza hunt them, using bows and arrows. The Hadza’s hunting might explain the less notable whistles they use. Filmed interviews show Hadza hunters explaining that they can evade being detected by their prey (猎物) because their whistles “sound like birds.” Contrarily, the signal the Yao use to communicate with the honeyguide can help scare off animals they find dangerous.
1. By cooperating with honey-hunting communities, honeyguides can _____.| A．nest near human culture |
| B．locate bee habitats easier |
| C．have access to more food |
| D．become familiar with the landscape |
| A．To study their mathematical models. |
| B．To check if they are a natural preference. |
| C．To investigate their usefulness to humans. |
| D．To see if they increase birds’ ability to find honey. |
| A．The human-bird relationship can change with new signals. |
| B．The Yao community hunts animals while looking for bee nests. |
| C．The honeyguides are more responsive to calls from the local people. |
| D．The signals from the Hadza were more effective in attracting honeyguides. |
| A．How mammals react to different signals. |
| B．How hunting techniques are applied to prey. |
| C．How whistles enable honeyguides to find targets. |
| D．How signals are associated with hunting practice. |
