1 . Plastic is everywhere in our modern world. Its toughness makes it an extremely useful material from household items to vehicle parts, but that same toughness makes it hard to break down for recycling or disposal (处理). However, Japanese scientists at the University of Tokyo have developed a new plastic material that can be broken down more easily and can self-heal and remember past shapes.
Based on a kind of plastic called an epoxy resin vitrimer, which is brittle (脆性的), the new plastic boasts a huge range of advantages. Once scratched with a knife, it can completely patch itself up after being heated to 150 ℃ for just 60 seconds. When shaped into the shape of a crane, then flattened, it can fold itself back into the crane shape by being heated up. It does all of this much faster than others of its type.
The new plastic can also break down easier. Even if it’s discarded (丢弃) into the environment, it still poses less of a, problem than other kinds of plastic, which the team demonstrated by placing it in seawater for 30 days. It biodegraded by 25% and released molecules (分子) that are essential food for marine life.
The new plastic is more resistant to breaking. It can also repair itself, and can recover its original memorized shape. It even biodegrades safely in a marine environment, according to Shota Ando, a researcher of the study.
The material can be used in a variety of applications, “Infrastructure materials for roads and bridges are often composed of epoxy resins mixed with compounds such as concrete and carbon,” said Ando. “By using the new plastic, these would be easier to maintain as they would be stronger and healable using heat. Unlike conventional epoxy resins, this new material is hard but stretchable, so it could also be expected to strongly bond materials of different hardness and stretch.”
1. What is the author’s purpose in writing paragraph 1?| A．To introduce the topic of the text. | B．To show the disadvantages of plastic. |
| C．To highlight the importance of plastic. | D．To indicate his views on previous plastic. |
| A．Change itself. | B．Shape itself. | C．Repair itself. | D．Burn itself. |
| A．It is safe for animals in the ocean. | B．It can provide nutrition for animals. |
| C．It can change its shape when frozen. | D．It is more brittle than previous plastic. |
| A．Research Of New Molecules | B．An Interesting Scientific Study |
| C．The Widespread Application Of Plastic | D．A New Environmentally Friendly Plastic |
2 . Landscape architect Kotchakorn Voraakhom has designed a new green roof on the Rangsit Campus of Thammasat University, about 25 miles north of central Bangkok, Thailand. Her imaginative work challenges the common thinking that urbanization has a negative impact on the planet, whether flooding, excess (过度的) energy use, disrupted (扰乱) biodiversity or the heat island effect.
The 236, 806-square-foot structure, which opened in December 2019, includes a flood water management system and Asia’s largest rooftop organic farm. It combines modern landscape architecture with traditional agricultural knowledge, creating a green and friendly environment.
The green roof, containing an H-shaped landscape, looks like a futuristic hill with a brick building beneath it. The hill features a complex pattern of zigzagging terraces (之字形梯田) of planted beds, leading all the way down to the bottom. When rainwater hits the roof, it flows down the zigzags while being absorbed by the soil in the beds, The excess water is directed into four storage ponds — with a capacity of up to 3 million gallons. The process slows down the flow speed of rainwater runoff compared to a normal concrete rooftop. This keeps the area from flooding during heavy rains.
The roof’s terraces are filled with organically grown crops, including a drought tolerant variety of rice, many local vegetables and herbs. The farm can supply the canteens on campus with a large amount of rice, herbs and vegetables a year. The food waste is composted (把……制成堆肥) to fertilize the farm, and water from the storage ponds is used to water plants, creating an entirely localized and circular system.
The farm serves as an outdoor classroom and a source of local jobs, too. Farmers offer workshops on sustainable agriculture and nutrition as part of the university’s sustainability curriculum. “Students and community members are invited to participate in seasonal seeding, harvesting, and so on,” says Voraakhom. “The urban farm is training a new generation of organic farmers with real-world skills. It also promotes a sense of community.”
1. What can we say about Voraakhom’s work?| A．It’s short-lived. | B．It’s creative. |
| C．It’s demanding. | D．It’s time-consuming. |
| A．To store more water. |
| B．To plant diverse vegetables. |
| C．To slow the speed of water flow. |
| D．To make it look more attractive than other buildings. |
| A．It uses food as fertilizer. | B．It benefits the environment. |
| C．It improves students’ lifestyle. | D．It produces vegetables and fruits. |
| A．Students can learn hands-on knowledge on the farm. |
| B．Farmers working on the farm can become professors. |
| C．The farm prevents government from offering people jobs. |
| D．The farm harms the relationship between university and community. |
3 . Most of us have heard of the 3Rs: reduce, reuse and recycle. It is the core principle of a sustainable (可持续的) life, but few of us can apply it in our own lives. Now, there’s a “lab” you can explore and discover a way toward living sustainably.
3R Lab is located in Xuhui district, Shanghai. It offers exhibitions, activities and goods that showcase the 3R principle. The key to a sustainable life, according to Vincent T. M. Fong, the 32-year-old from Hong Kong who created the lab, is to make it a long-term promise. “A sustainable life should be sustainable itself in the first place. You can’t lead a sustainable life on a whim. Small and comfortable changes are exactly what you need,” Fong said.
The lab regularly hosts ugly fruit markets, offering these strange fruits which are often thrown away by traditional markets and consumers at a quite attractive price. “They’re thrown away simply because of their appearance. Buying fruit regardless of how they look reduces food waste significantly in our daily life,” Fong commented.
A water tank with two types of straws is another equipment in the lab. “One type is made from normal plastics widely used in our daily life while the other is from PHA, a new replacement for plastics, and the water is sourced from the Suzhou River,” explained Ni Li, an employee of the lab. Visitors can see how the PHA straws degrade (降解) into a thin layer in just one month, while the others remain unchanged.
“Leading a sustainable life does not necessarily mean sacrifice,” said Fong. Consuming ugly fruit and using degradable plastics are small changes that are good for the environment and easy to stick to. Only in this way can the 3R principle become part of our lives, he added.
After working there for six months, Ni, who wasn’t mindful of the 3R principle before arriving at the lab, now uses her cup every time she buys a coffee. “The job has reshaped my life,” Ni said.
1. What does the-underlined phrase “on a whim” in the second paragraph probably mean?| A．In a rush. | B．On a regular basis. |
| C．Without any reason. | D．As a common practice. |
| A．To reduce food waste. | B．To promote healthy eating. |
| C．To sell new kinds of fruit. | D．To provide more affordable fruit, |
| A．The water pollution caused by plastics. | B．The degradation of PHA straws. |
| C．The interaction between two types of straws. | D．The disappearance of normal plastic straws. |
| A．She avoids going to traditional markets. | B．She has devoted less time to her hobbies. |
| C．She has got rid of a few bad habits. | D．She is leading a low carbon life now. |
4 . More than 170,000 people in California are unhoused. Even as the state has poured resources into fighting against the problem, the number of people without homes has ticked upward in recent years. On the surface, the state has one key advantage for people without a reliable roof over their heads: relatively consistent and livable weather. So one of my first thoughts when I heard news of a horricane attacking Los Angeles was just “What will happen to the city’s homeless population?”
City agencies quickly took action. As it became clear that the Los Angeles region could experience an extreme downpour and subsequent flooding, outreach teams fanned out across the river bank and dam areas across the city that have become home to a significant unhoused population, offering support to move them into shelters and motels (汽车旅馆).
Despite that, it’s obvious that the effects of climate change will hit the most vulnerable (脆弱的) hardest. We see this globally as extreme weather events hit countries that have contributed the least to the problem.
The most notable connection between climate change and the US housing crisis is the threat extreme weather poses to unhoused people. More unhoused people are affected as climate change drives increasingly unpredictable weather. People without homes know how to respond to expected seasonal events. But events like a near-hurricane in Los Angeles or a wildfire in ‘Maui can catch populations with limited access to information off guard.
Another link worth considering is the way in which climate change creates more homelessness and further stresses on housing systems. Hurricane Katrina, for example, displaced 800, 000 people. Four years later, 12,000 people remained without shelter.
Housing has been — and will continue to be — a key issue in Maui too as it recovers from the wildfire that killed more than 100 people. Maui has already had a housing crisis, the result of a high cost of living driven in large part by the tourism industry. And, now, many more are left looking for places to stay. Ashley Kelly, the chief operating officer at Hawaii’s Family Life Center, said: “Finding housing for any new clients is just not possible right now.”
1. What contributes to the increase of the unhoused population in California?| A．Its mild weather. |
| B．Its inclusive local culture. |
| C．Its limited basic facilities. |
| D．Its relaxed state policies. |
| A．They built dams to prevent flooding. |
| B．They moved homeless people to safe places. |
| C．They sought low-cost housing from city agencies. |
| D．They surrounded the river bank to keep people away. |
| A．Mysterious. | B．Exceptional. | C．Changeable. | D．Difficult. |
| A．Ways of Americans relocating disaster-affected populations. |
| B．The significance of timely weather updates for the homeless. |
| C．The link between climate change and the housing crisis in the US. |
| D．Approaches of homeless Americans to dealing with natural disasters. |
5 . Scientists have known for years that plants respond to sounds around them. For example, flowers make sweeter nectar (花蜜) to the sound of buzzing bees. But now scientists in Israel have shown that plants also seem to be doing some “talking”.
Professor Lilach Hadany and her team at Tel Aviv University set up microphones to record tomato and tobacco plants under different conditions. Their recordings showed that the plants made ultrasonic (超声波的) sounds.
When the researchers adjusted their recordings so that humans could hear them, they heard sharp clicking noises. Plants clicked hardly at all when they had enough water. But as their soil got drier, they clicked more and more. When scientists cut off a stem (茎) from the plants, the plants also clicked more. But the clicking wasn’t the same as when the plants needed water.
It’s not clear how the plants make the sounds and whether the plants are making the sounds on purpose. But the plants are definitely making noises, and creating much more noises when they’re stressed (not enough water, stem cut off) than when they’re not.
The researchers trained an Artificial Intelligence (AI) system to identify the different kinds of clicking sounds. The system was able to tell the difference between plants that needed water and plants with cuts about 70% of the time. The result suggests that researchers may one day be able to use a plant’s sounds to figure out when it is having trouble, and what trouble it is having. That could be very helpful to farmers.
The new discovery raises many more questions. One important question is: Do plants make sounds to communicate with each other? Other research has shown that plants do seem to communicate in some ways. Plants being attacked by insects send chemicals into the air. Soon, nearby plants (that haven’t been attacked yet) start to make other chemicals that don’t taste good to insects. It’s possible that the ultrasonic sounds could work in a similar way.
1. What do the researchers find in their recordings?| A．Plants’ stems click less when they are cut off. |
| B．Plants click harder if they have enough water. |
| C．Plants make more noises when they are thirsty. |
| D．Flowers make sweeter nectar to the sound of bees. |
| A．There are still some unknown issues. |
| B．Not all of them are able to make sounds. |
| C．There are ultrasonic sounds around them. |
| D．They make less noises when they’re stressed. |
| A．To help farmers drive away insects. |
| B．To identify people who are in trouble. |
| C．To show the growing process of plants. |
| D．To distinguish types of clicking sounds. |
| A．Methods for plants to protect themselves. |
| B．Other questions raised by the new finding. |
| C．When plants communicate with each other. |
| D．Under what conditions plants attract insects. |
6 . Amanda and Daines Tanner’s dog jumped onto their bed a few months ago and pawed at their bodies while they were trying to sleep. It was around 5:30 A．m. on a Saturday — the day each week the couple
Amanda Tanner had never seen Axel, their 1-year-old border collie, so
Daines Tanner drove Gabriel to an emergency room in Houston, where doctors determined that he was having a stroke. Gabriel has since
Sabih Effendi, a doctor who
| A．lived up to | B．looked forward to | C．looked around | D．lived through |
| A．energetic | B．adorable | C．sleepy | D．greedy |
| A．demanded | B．forced | C．walked | D．ordered |
| A．instead | B．quite | C．indeed | D．rather |
| A．knocking | B．looking | C．staring | D．pawing |
| A．balance | B．confidence | C．gift | D．courage |
| A．further | B．clearer | C．smaller | D．larger |
| A．pulled | B．cast | C．noticed | D．insisted |
| A．behavior | B．clues | C．symptoms | D．crisis |
| A．delicate | B．numb | C．frozen | D．ideal |
| A．nearly | B．immediately | C．quickly | D．barely |
| A．enhanced | B．regained | C．transformed | D．combined |
| A．represented | B．impressed | C．treated | D．spotted |
| A．informed | B．awakened | C．grasped | D．encountered |
| A．reward | B．possess | C．attach | D．display |
7 . A lot more animals glow under a special light than scientists previously thought. This ability to glow is known as fluorescence (荧光), which happens when light is absorbed as one wavelength and emitted as another wavelength.
Travouillon, a scientist from Harvard, wondered why so many animals had this unusual quality, and he asked one key question: Is there a function behind the ability? To address the question, Travouillon and his team took a closer look at the life histories of the glowing mammals.
The team discovered that the fluorescence was mainly found in light-colored areas of an animal’s skin and fur. Then they looked at where the fluorescence was found in the animal’s body. They compared that to the animal’s diet and how the animals moved. They also checked whether the animal was nocturnal or diurnal, Travouillon explained. Animals that are nocturnal are most active at night, whereas animals that are diurnal are most active during the day.
One finding was that fluorescence was more common among ground-dwelling, tree-dwelling and burrowing mammals compared to animals that live in water, Travouillon said. The team also found that having a fluorescent coat was more common among nocturnal animals compared to diurnal animals. One potential explanation for that fact is that having a fluorescent coat could help no cturnal animals become more visible to potential partners.
“So, for example, with a species like a quoll that has white spots on its back, the fluorescence would simply brighten their spots,” Travouillon said. “In this way, they are more easily seen. Fluorescence might help members of a species find each other and perhaps recognize each other from a distance,” Travouillon added.
On a closing note, Travouillon cautioned wildlife enthusiasts not to go searching for glowing critters with a UV light. That’s because UV light can damage the animal’s eyesight. Instead, if you want to look for animals in the dark, he recommended using a red light, since it isn’t as bright.
1. What kind of animals are most active at night according to the passage?| A．Diurnal animals. | B．Nocturnal animals. | C．Glowing animals. | D．Underwater animals. |
| A．To live in water. | B．To help them move easily at night. |
| C．To see the members of their species clearly. | D．To brighten other nocturnal animals’ spots. |
| A．UV light is harmful for the animal’s eyesight. |
| B．Wildlife enthusiasts can’t search for glowing critters. |
| C．Nocturnal animals can be found easily by wildlife enthusiasts. |
| D．Wildlife enthusiasts had better use bright light to search for glowing mammals. |
| A．Active mammals with fluorescent. | B．Suggestions for animals enthusiasts. |
| C．Animals glow under special lights. | D．Mammals with an unusual ability in the night. |
注意：
1.写作词数应为 80个左右；
2.请按如下格式在答题卡相应位置作答。
How to Have a Low-carbon Spring Festival
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Plastic production is energy intensive (能源密集型) and consumes fossil fuels. When burnt, waste plastic gives off heat-trapping gases and other pollutants. Once such emissions (排放) reach a certain level, it results
China’s efforts
Over the past decade, China
China has also made great
1. 灾情发生的时间和地点；
2. 灾情造成损失和伤亡情况；
3. 前往救援的人员以及给与的物资和捐款情况。
注意：1. 写作词数应为80左右；
2. 请按如下格式在答题卡的相应位置作答。
A Flood disaster
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