As temperatures soar, electric bills often go through the roof. That’s because people tend to turn on their air conditioners during the long, hot summer months.
It’s been predicted that by 2050 about 75 percent of the world’s homes could have air conditioners. If that’s true, the energy required to cool buildings will double. For that reason, researchers continue to look for solutions to keep air-conditioner usage to a minimum. Some innovations are being used already or are in the process of being developed. Certain building materials can feel cooler because of their ability to absorb heat and release it slowly. Other buildings use water cooling systems to cool them. However, these aren’t the only methods. Science has a few more tricks up its sleeve.
Researchers at Purdue University have developed the world’s whitest paint. This paint can keep a building’s exterior surface cooler than the surrounding temperature. On hot days, walls absorb heat and often become 10 to 20 degrees Celsius hotter than the air around them. But walls painted with Purdue’s white paint reflect 98.1 percent of the heat and send it back into space. This creates a cooling effect.
Purdue professor Xiulin Ruan believes that the super-white paint could have a more powerful cooling effect than many home air conditioners. Researchers hope to have the paint on the market in five to 10 years.
Yi Zheng of Northeastern University has created a “cooling paper”. This material reflects the sun’s rays while pulling heat out of a building’s interior, and the paper can be recycled. He and his team discovered that the paper helps bring down a room’s temperature by about 6 degrees Celsius. Zheng hopes that the cooling paper will someday be used on roofs and within building materials.
Now and in the future, perhaps some of these energy-efficient methods will make it easier to beat the heat.
1. Why does the author mention the air conditioners at the beginning of the passage?| A．To describe a fact. | B．To support an idea. |
| C．To provide examples. | D．To introduce the topic. |
| A．It has been on the market. |
| B．It is the world’s coolest paint. |
| C．Walls painted with it reflect most of the heat. |
| D．It can keep the whole building’s surface cooler. |
| A．The surface of a buildings is better covered with paper. |
| B．Buildings will be built mostly with cooling paper someday. |
| C．The cooling paper will be practical and eco-friendly building materials. |
| D．The cooling paper can bring down a room’s temperature more than air conditioners. |
| A．Purdue’s White Paint: A New Material to Cool Buildings |
| B．Cool Buildings: Innovative Ways to Keep Buildings Cool |
| C．Cool Building Materials: Solutions to Fight against Climate Change |
| D．Future Air Conditioners: New Energy-efficient Methods to Beat the Heat |
相似题推荐
【推荐1】In today’s digital era, social media users are increasingly coming across fake news online. This leads to the pressing issue: What causes people to fall for misinformation on the Internet?
According to researchers at the Penn State College of Information Sciences and Technology, users can easily fall into an echo chamber (回声室)—a sort of virtual space where users consume only one-sided news, eventually distrusting any opposing views. “We all tend to agree with the group opinion. Hence, people naturally get together with others who hold the same opinion,” said Dongwon Lee, one of the researchers. “But if you’re not cautious, there is a high risk of falling into an echo chamber.”
To prevent this phenomenon, the researchers have crafted a novel tool, a game named ChamberBreaker, to help players resist echo chambers and reduce the rate of fake news spread. The fundamental approach employed by ChamberBreaker centers around a decision-making procedure that mirrors the creation of echo chambers. In ChamberBreaker, a player is tasked with trying to have community members fall into an echo chamber. To begin, the player is randomly assigned a situation that focuses on a health, political or environmental issue, and is presented with six pieces of news on that topic. Then, the player selects news that could cause the other members to fall into an echo chamber while at the same time maintaining their trust. If successful, the community members will fall into an echo chamber and the player will witness the resulting negative effects on the community.
After developing ChamberBreaker, researchers tested it with over 800 subjects to see if it raised awareness of echo chambers and changed news consumption behaviors. The researchers found that those who played ChamberBreaker were significantly more likely to state their intention to observe online information from more diverse perspectives and showed an increased awareness of the echo chamber phenomenon.
Ultimately, the researchers hope that their methodology can excite a greater interest in the scientific and scholarly study related to information consumption. The application of tools like ChamberBreaker, which focuses on fostering analytical reasoning, may lead us towards a more informed online community.
1. What can be learned about an online echo chamber?| A．It encourages well-judged views. |
| B．It gathers like-minded individuals. |
| C．It functions as a virtual reality platform. |
| D．It serves as a tool for identifying fake information. |
| A．Assignment of situations. |
| B．Trust-building exercises. |
| C．News selection strategy. |
| D．Community impact assessment. |
| A．The results of scientific testing. |
| B．The theoretical framework of the game. |
| C．The description of the game procedures. |
| D．The common challenges faced during gameplay. |
【推荐2】Steve Davies, a 23-year-old board designer in Wales, is developing a surfboard made from mycelia (菌丝体) instead of plastic.
A 2022 report showed that more than 400, 000 boards are made each year. The global market for surfboards reached $2.2 billion in 2020 and is expected to reach $3.2 billion by 2027. But about 80% of boards are made from plastic, which can take hundreds of years to break down. This will be a serious problem for the environment as the market grows.
“And even when it does break down, it can go into fish’s ecosystem (生态系统), which means that humans will end up eating this plastic,” Davies said.
Davies made his first surfboard in 2020, but the experience showed him many harmful materials were produced in making each board. During his final year at university, he started looking into mycelia and making his beloved sport more environment-friendly.
“My family owns a farm with horses, so I was quickly able to collect substrate material (基料) in the form of horse bedding, to allow the mycelia to grow in,” Davies explained. “This gave me an idea to start a surfboard business—growing surfboards on a farm near the beach and using waste materials from that very same farm, reducing the transport of materials, and therefore reducing carbon (碳) given out into the environment.”
“In the right conditions, we will grow a mycelium board in around 21 days,” Davies said. “The dream would be to make it the new standard. Connecting with nature would be the new design rules and that would be really cool. We’re using the sea and we should give back to the sea.”
1. What do the numbers in Paragraph 2 mainly show?| A．Going surfing costs a lot of money. | B．Surfing is popular with young people. |
| C．Designing surfboards is a good business. | D．Making eco-friendly surfboards is necessary. |
| A．To explain a rule. | B．To present a reason. |
| C．To make a comparison. | D．To share an experience. |
| A．Why Davies loved to design surfboards. |
| B．What made Davies’ surfboard business possible. |
| C．Why Davies wanted to study mycelia at university. |
| D．How Davies collected substrate material to make surfboards. |
| A．He supports environment-friendly products. | B．He hopes to succeed in selling surfboards. |
| C．He loves to get designing ideas from sea. | D．He dreams of creating cooler surfboards. |
【推荐3】Television is a central part of many people’s lives. There are very few places in the world where one cannot find a television set. Some sporting events, such as the Olympic Games or the football World Cup, can attract audiences of many millions. But is television a good or bad influence on young people in the modern world?
Thomas Murray, president of the British Parents Against Television Society, believes that it has not improved young people’s lives. “Television damages family life,” he argues. “At mealtime, families no longer talk to each other. In the evenings, youngsters do not spend good quality time with family members. Instead, they watch television.” Murray says that this lack of communication leads to social problems.
Murray also believes that the content of television programmes provides young people with poor role models. “There is so much violence(暴力) on TV—guns, kung fu fighting, and so on. Young people think that all problems should be solved by aggression.”
It is not just young people’s mental health that worries Murray. “Teenagers don’t get enough exercise because they spend so many hours watching television. They also develop back problems from sitting down for so long, and eye strain from the effort of watching.”
Murray would like to see changes to television habits. “Programmes should be educational. Their contents should be nonviolent and healthy. There should be no programmes after ten o'clock in the evening. Parents should teach their children to enjoy their spare time by playing sports or games. And certainly, the television should be switched off during meal time.
Susan Taylor is a television producer. She believes that television is a good influence on young people. “Television brings the outside world to youngsters. It even brought us pictures from the moon! And look what happens after the Olympic Games or the World Cup matches have been shown on TV. People start to take more exercise. Also, there are a lot of programmes about healthy eating and keeping fit.”
However, Taylor agrees with Murray’s point of view concerning parents. “Of course parents have a role to play in educating their kids. They should turn the TV off during mealtime and they should talk with their children as often as possible.”
1. The article is mainly about ________.| A．that TV is a central part of many people’s lives |
| B．that Murray would like to see changes to television habits |
| C．whether TV is a good or bad influence on young people in the modern world |
| D．that parents should turn the TV off during mealtime and talk with their children |
| A．Teenagers will get backache for sitting down for a long time. |
| B．Murray only worries about young people’s mental health. |
| C．TV programmes are nonviolent and educational. |
| D．Teenagers don’t like doing exercise at all. |
| A．The lack of communication. |
| B．Young people watching too much TV. |
| C．So much violence on TV. |
| D．Not enough exercise. |
| A．eye sickness | B．blindness | C．eye tiredness | D．far-sightedness |
| A．Murray is president of the British Parents Against Television Society |
| B．Susan Taylor completely disagrees with Murray on TV |
| C．there are both good and bad programmes on TV |
| D．Susan Taylor is a television producer |
【推荐1】A compost (堆肥) program at the Wesley School in Los Angeles is helping kindergarten through eighth grade students to teach them ways to solve human-driven climate change. For the past year, 5, 200 pounds of food waste from the school has gone into compost containers rather than a landfill where it would just break down and produce planet-warming gases.
The school workers could have easily thrown the food waste into a city-provided green bin (垃圾箱) . But taking it out of sight, which would have been easier, would have missed the point, says science teacher Johnna Hampton. “When it’s invisible like that, they don’t see it, but they know it doesn’t sink in (心安) .”
When sixth grader Finn saw the finished compost pile, it sank in. “That’s my orange chicken in there,” he says. “That’s not just like any food. Somewhere in there is my food.”
The school will use the compost on plants around campus. Some will be offered to families that want to use it at home, and whatever is left will be donated.
Fifth grader Sloan felt so encouraged by the school’s compost program she decided to take climate action outside of school. Along with several other fifth graders, Sloane says, “We did a lemonade stand at our friend’s house and we made over $200, and we donated it.” They also helped create a petition (请愿) to replace the plastic forks and spoons in the school cafeteria with compostable ones.
Fifth grader Kingston was excited to learn his food waste will help grow new food on campus. “It feels good that you’re doing something that helps the planet, instead of just sitting and watching it get destroyed,” he says.
Jennifer Silverstein, an expert on climate, says the school’s compost program checks a lot of the boxes for effective, positive climate education to help youth understand the crisis of human-caused climate change.
1. What is the purpose of the compost program?| A．To prevent wasting food. | B．To deal with climate change. |
| C．To raise money for the school. | D．To keep friendship among kids. |
| A．By selling to families as compost. | B．By putting into compost containers. |
| C．By turning into new food again. | D．By throwing into dustbins. |
| A．She has taken climate action. | B．She has gained a sense of achievement. |
| C．She has got a part-time job in the school. | D．She has developed a new way to donate. |
| A．It is well received. | B．It is highly profitable. |
| C．It needs to be more effective. | D．It takes time to watch the result. |
【推荐2】I am drawn to the peace and pure beauty of primary nature. Being in it heightens my perceptions and narrows my focus. As I concentrate on the surroundings, an inner stillness fill me and helps mega in a sense of place. This was the case when I packed my camera equipment and explored some of Europe’s old-growth forests to highlight these unique environments that have remained untouched for centuries, despite threats of human disturbance.
The visits were often challenging because of unfavorable weather conditions and the distances I had to cover while going multiple times to the locations for a good picture. But the joy of the experience always prevailed. Hiking off trail through the foggy laurel forests of Madeira, I was enveloped by trees that may have been up to 800 years old and whose trunks provided me with shelter when clouds released a sudden down-pour. It felt like entering a holy space.
Wandering in the Scots pine forests of northern Sweden and the mountain tree lines of southern Norway rewarded me with the sense of freedom I always get in the Scandinavian wilderness. The beech (山毛榉) stands rising from the steep slopes of Italy kept me in awe of the power that forests protected from development can possess. I feel honoured that I was allowed access to explore and photograph these wonderlands.
Except Russia, only about 2 percent of the forest areas in Europe are primary, or have never been cleared, reflecting a dazzling richness of life that once filled vast wooded ecosystems. Most of the areas are now protected, but as the human population continues to grow—with disastrous impacts on the planet and its living creatures—the future of these forests is far from certain. I hope that they will still be standing for many centuries more.
1. Why does the author like to explore the forests in Europe?| A．To help protect the vast ecosystems. | B．To experience the beauty and peace. |
| C．To improve his skill of taking photos. | D．To enjoy the feeling of being challenged. |
| A．Won out. | B．Piled up. | C．Ran out. | D．Faded away. |
| A．Most forests in Europe are kept as what they were. |
| B．People have free access to these primary forests. |
| C．The increasing population causes the destruction of forests. |
| D．The author prefers the trees of Norway to the beech stands in Italy. |
| A．Hopeful. | B．Concerned. | C．Uninterested. | D．Not clear. |
【推荐3】As night falls on the streets of Shanghai, Mikiko Chen can often be found pacing up and down through the winding narrow streets of the city hunting for discarded items.
“I pick up all sorts of things, chairs, wine boxes, bowls and cups. . . it’s like treasure hunting for me, “she says. The 27-year-old digital marketer is among the first adopters of “stooping” in China, a practice that refers to picking up discarded furniture and other goods on the streets for re-use. She says the concept “stooping” was inspired by New Yorkers who often leave unwanted things on the “stoops” —or doorsteps—leading up to the entrances of buildings.
“The core concept of stooping for me is to make the best use of things,” Ms. Chen says. “It can help you to save money, but it’s not just about lowering consumption.” “It’s wasteful to throw away something that’s still usable; it’s better to share it with others who need it.”
Ms. Chen says she was among the first to use the hashtag (话题标签) #stooping on Xiaohongshu. “I initially started with posting items that people no longer used and wanted to throw away or exchange . . gradually I’m receiving hundreds of messages each day,” she says. Since then, the trend has become increasingly popular.
Ms. Chen says she is “very surprised” the concept has become a hit on social media, as older generations often stigmatize picking up things from the street or using second-hand goods. “People like my mum consider stooping as ‘rubbish picking’ and ‘scavenging’ (拾荒),” she says. “She thinks that people will look down on you for doing this.”
For Nan Zheng, an environmentalist and advocate, stooping is more than the physical act of picking up things from the streets. He created an app called “Grecycle” where people can give away or take unwanted items for free. “I think we can let more people know about the concept of stooping as an interesting and fun thing to do,” Mr. Nan says. “But then, gradually we can let people know this can also be about charity and helping others.”
1. What can we learn about Mikiko Chen from paragraph 2 and 3?| A．She is hunting for costly treasures. |
| B．She just wants to reduce consumption. |
| C．She got inspiration from New Yorkers. |
| D．She intends to make the most of throwaway items. |
| A．To collect varieties of messages. |
| B．To go viral on social media. |
| C．To share something still usable with others. |
| D．To throw away unwanted things on the “stoops”. |
| A．The older are ashamed of stooping. | B．The older are skilled at stooping. |
| C．The older are exposed to stooping. | D．The older are addicted to stooping |
| A．Recycling discarded things from the streets. |
| B．Getting unwanted items for free on “Grecycle”. |
| C．Exchanging items through “Grecycle”. |
| D．Enhancing people’s awareness of charity. |
【推荐1】For those who can stomach it, working out before breakfast may be more beneficial for health than eating first, according to a study of meal timing and physical activity.
Athletes and scientists have long known that meal timing affects performance. However, far less has been known about how meal timing and exercise might affect general health.
To find out, British scientists conducted a study. They first found 10 overweight and inactive but otherwise healthy young men, whose lifestyles are, for better and worse, representative of those of most of us. They tested the men’s fitness and resting metabolic (新陈代谢的) rates and took samples (样品) of their blood and fat tissue.
Then, on two separate morning visits to the scientists’ lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel. Before one of these workouts, the men skipped breakfast, meaning that they exercised on a completely empty stomach after a long overnight fast (禁食). On the other occasion, they ate a rich morning meal about two hours before they started walking.
Just before and an hour after each workout, the scientists took additional samples of the men’s blood and fat tissue.
Then they compared the samples. There were considerable differences. Most obviously, the men displayed lower blood sugar levels at the start of their workouts when they had skipped breakfast than when they had eaten. As a result, they burned more fat during walks on an empty stomach than when they had eaten first. On the other hand, they burned slightly more calories (卡路里), on average, during the workout after breakfast than after fasting.
But it was the effects deep within the fat cells that may have been the most significant, the researchers found. Multiple genes behaved differently, depending on whether someone had eaten or not before walking. Many of these genes produce proteins (蛋白质) that can improve blood sugar regulation and insulin (胰岛素) levels throughout the body and so are associated with improved metabolic health. These genes were much more active when the men had fasted before exercise than when they had breakfasted.
The implication of these results is that to gain the greatest health benefits from exercise, it may be wise to skip eating first.
1. The underlined expression “stomach it” in Paragraph 1 most probably means “______”.| A．digest the meal easily | B．manage without breakfast |
| C．decide wisely what to eat | D．eat whatever is offered |
| A．Their lifestyles were typical of ordinary people. |
| B．Their lack of exercise led to overweight. |
| C．They could walk at an average speed. |
| D．They had slow metabolic rates. |
| A．They successfully lost weight. | B．They consumed a bit more calories. |
| C．They burned more fat on average. | D．They displayed higher insulin levels. |
| A．A workout after breakfast improves gene performances. |
| B．Too much workout often slows metabolic rates. |
| C．Lifestyle is not as important as morning exercise. |
| D．Physical exercise before breakfast is better for health. |
【推荐2】Life on this planet, in all its wide diversity, is disappearing more quickly now than it was at any time in human history, and about 1 million species of plants and animals face extinction, a new research from the IPBES, an organization of the United Nations, has found.
The IPBES published a full report about the new research. The future for the species that we share the planet with — and on which we depend — is dire, according to the report.
On land, the number of animals has decreased by an average of 20 percent, mostly in the last 120 years. Moreover, 1 million square kilometers(386,000 square miles) of tropical forest have been lost since 1980. In the ocean, about a third of corals and marine mammals(海洋哺乳动物) face possible extinction.
Humans have played a major role in these declines, from the way in which we use the land and oceans, such as farming, fishing to logging and mining. The chemicals we use pollute the air and water. Global warming caused by population explosion, air pollution, ecological destruction and so on has forced some species to leave their traditional habitats. All of these have left their mark on Earth’s biodiversity, the report says.
Many experts said that the report demonstrates the need for urgent action. “The IPBES report makes it clear that our response to protecting natural systems must be stronger than ever,” John Robinson said. “The IPBES report on the global state of biodiversity is shocking but not entirely surprising,” said Andrew Norton. “The question is how many evidences and repeated warnings it will take to wake us up to the urgency and act.”
1. What does the underlined word “dire“ in paragraph 2 mean?| A．Inspiring. | B．Worthless. | C．Terrible. | D．Excellent. |
| A．By analyzing the cause. | B．By listing data. |
| C．By answering questions. | D．By making comparisons. |
| A．We need more time to think before we take steps. |
| B．It is high time to take action to protect biodiversity. |
| C．Our response to protecting natural systems is stronger than ever. |
| D．Humans have already realized the urgency of protecting biodiversity. |
| A．A Rapid Decline in Biodiversity | B．Humans’ Efforts to Save Nature |
| C．Experts’ Opinions on the IPBES Report | D．A Slow Response to Protecting the Biodiversity |
【推荐3】For much of history, biologists and behaviorists assumed that intelligence of species could be neatly organized into a hierarchy. Modern man was placed at the top, followed by other mammals (哺乳动物). Then came the birds, reptiles (爬行动物) and insects.
However, research suggests that intelligence is actually distributed in different ways across the animal kingdom. In the 1960s, a new generation of researchers pushed the rest of the academic community to define animal intelligence in looser terms. They thought the conventional definition of intelligence — something made up of both consciousness and the ability for abstract thought — was too particular to our own species. Because every animal followed a completely different evolutionary journey, intelligence should be measured in relative terms instead of absolute terms.
In the following decades, a variety of technologies that allow us to observe animals for longer periods of time without disturbing their normal routines revealed that animal behaviors are far more complex than many previous thoughts. In Melbourne, some remote controlled machines are helping researchers to better understand the breeding patterns of southern right whales. Meanwhile, they use the computer to learn to understand, track and predict the movements of organisms.
Regardless of our rapidly changing conception of animal intelligence, it is best recognized when the behavior of an animal is similar to our own behavior. For example, elephants, which are said to remember and return to the tomb sites of dead members of their herd. They also exhibit an unusual interest in the dead bodies of other elephants, signaling their attention to death and perhaps even realizing their own death.
As time passes, we are continuously amazed at the level of cognitive (认知的) complexity exhibited by animals. At times, their madness can be difficult to spot. Modern technology finally allows us to look with some precision. Though the search only got underway a few decades ago, we have already discovered more similarities between animals and ourselves than we previously expected.
1. What does the underlined word “hierarchy” in paragraph 1 probably mean?| A．Rank. | B．Trend. | C．Form. | D．Campaign. |
| A．Abstract. | B．Inaccurate. | C．Unnoticed. | D．Complex. |
| A．To make a prediction. | B．To make an assumption. |
| C．To prove an exception. | D．To prove a viewpoint. |
| A．Human cognition. |
| B．Human intelligence. |
| C．The distribution of animal intelligence. |
| D．The species classification in the animal kingdom. |
