More than a third of the world’s population lives in drylands, areas that experience significant water shortages. Engineers and scientists at the University of Texas at Austin have developed a unique solution to help people in these areas access clean drinking water.
They developed a low-cost gel film (凝胶膜) that can pull water from the air in even the driest climate. Combining two simple ingredients, cellulose and konjac gum, the gel is inexpensive to produce. Just one kilogram of gel can absorb up to six liters of water in a dry climate. For those living in a climate with relative humidity, one kilogram of gel can collect up to13 liters of water a day. As the gel is so inexpensive and easy to make, it may offer a way of providing drinking water to countries with water shortages.
Previously, researchers have harvested fresh water from fog and dew, but that only serves areas with high humidity. Other attempts at pulling water from desert air are typically energy-intensive and do not produce much. In fact, this gel is a vast improvement from previous water harvesting technologies. The maximum water harvested has been 5. 87 liters in places with relative humidity. This new gel doubles this amount, uses no energy and is simple to operate and it can be molded into a shape or size that best suits the user.
“This new work is about practical solutions that people can use to get water in the hottest, driest places on Earth,” said Guihua Yu, professor at the Cockrell School of Engineering. “This could allow millions of people without consistent access to drinking water to have simple, water generating devices at home that they can easily operate.”
“This is not something you need an advanced degree to use,” the paper’s lead author, Youhong “Nancy” Guo said. “It’s straightforward enough that anyone can make it at home if they have the materials.” Scientists are planning on making a thicker gel that will increase the yield, making this technology a practicable solution to drought.
1. What do we know about the gel film from paragraph 2?A.It can increase the humidity of the air. |
B.It can harvest drinking water from the air. |
C.It has been widely applied in desert areas. |
D.It costs lots of money and energy to produce. |
A.Indifferent. | B.Skeptical. | C.Unfavourable. | D.Hopeful. |
A.Plain. | B.Obvious. | C.Tough. | D.Direct. |
A.Develop a thicker gel. |
B.Produce the gel on a large scale. |
C.Raise money for further research. |
D.Teach people to make the gel at home. |
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【推荐1】A UK supermarket has become the first in the world to let shoppers pay using just the veins (纹理)in their fingertips. Customers at the Costcutter Store, at Brunel University in London, can now pay using their unique vein pattern to identify themselves.
The firm behind the technology, Sthaler, has said it is in "serious talks" with other major UK supermarkets to adopt hi-tech finger vein scanners at pay points across thousands of stores. It works by using infrared(红外线)to scan people's finger veins and then links this unique biometric map to their bank cards. Customers' bank details are then stored with payment provider Worldpay and in the same way you can store your card details when shopping online. Shoppers can then turn up to the supermarket with nothing on them but their own hands and use them to make payments in just three seconds.
Previous studies have found fingerprint recognition, used widely on mobile phones, is likely to be hacked and can be copied even from fingerprint left on phone screens. But Sthaler claims vein technology is the most secure biometric identification method as it cannot be copied or stolen. The technology uses an infrared light to create a detailed map of the vein pattern in your finger. It requires the person to be alive, meaning in the unlikely event a criminal hacks(非法侵入)off someone's finger, it would not work.
Sthaler said it takes just one minute to sign up to the system firstly and, after that, it takes just seconds to place your finger in a scanner each time you reach the supermarket checkout. Simon Binns, commercial director of Sthaler, told the Daily Telegraph, ''This makes payments so much easier for customers. There are no known occurrences where this security has been broken. ''
1. Which supermarket in the world can now use the vein-recognition technology?A.Grocery stores in London. |
B.Thousands of stores in the UK. |
C.University supermarkets in the UK. |
D.Costcutter Store at Brunel University in London. |
A.The system is safe. | B.Hacker attacks are unlikely. |
C.Vein patterns can be copied. | D.The technology is convenient. |
A.Copy the fingerprint. | B.Protect against hacking. |
C.Contact the supermarket. | D.Register on the system. |
A.It has been hacked. |
B.It will be adopted by more shops. |
C.Its company is optimistic about it. |
D.Its technology needs further improvement. |
【推荐2】Stroke(中风) survivors often struggle with manipulating objects. They lose the sensation (知觉) in their hands and fingers, which is the usual impairment(损伤) they experience daily. This condition affects their activities and lowers the quality of their lives to an extent. As a solution to this problem, a group of scientists from the UK’s University of Hertfordshire has developed a special touchpad that can allow them to feel once again.
In an article by E&T, the University of Hertfordshire researchers have created a unique invention that can bring back the sense of touch among stroke survivors. This particular device is capable of sending tiny vibrations(振动) to the patient’s fingertips. This will give life to the brain cells so they can function once again and restore the sensation of the limbs.
If the survivor wears this device, they could now normally function as before. They can do tasks on their own without asking for help from other people. “Improvement in touch sensation should lead to them being able to sense that they are holding hands. That definitely should be possible,” Dr. Am it Pujari, the inventor of the device, said.
During the British Science Festival, the device developer urged the participants to tell if they had sensations on their hands while the tool was placed. The trial lasted for 10 minutes. The researchers found that 20 to 40%of them have shown an improved sensation in their limbs.
Besides enhancing the patient's movements, the test proved that it could also be a huge help in improving a patient's mental well-being. The study is expected to undergo a peer review in the future. The experts are still wondering about the device's impact in the long run. They also want to tackle how effective it is for patients who suffer from stroke.
1. What’s the function of the special touchpad?A.Increasing stroke survivors' brain cells. |
B.Changing the way stroke survivors seize objects. |
C.Helping stroke survivors regain the sense of touch. |
D.Monitoring the life quality of stroke survivors. |
A.Preventing stroke. | B.Restoring the sensation of hands. |
C.Turning to others for help. | D.Wearing the special device. |
A.It has undergone a peer review. |
B.It cures stroke immediately. |
C.It helps improve patients' mental health. |
D.It has produced long-term impact on patients. |
A.It’s negative. | B.It’s typical. |
C.It’s encouraging. | D.It’s disappointing. |
【推荐3】Lions are the top tourist attraction to Kenya and also considered critically endangered. One of the main causes of their death is that people kill them in return for lions attacking their cows. “We put our cows in a small cow shelter at night,” locals said, “and that’s when the trouble would start. Lions would jump in the shelter and kill the cows”.
There have been a lot of efforts to try to protect the lions, but it’s a crisis and everyone is looking for a solution. One idea was land leases(租用), another was lion-proof fences. However, no one even knew that Richard Turere, a 13-year-old Maasai from Kenya, had already come up with something that worked.
One night Richard was walking around with a flashlight and discovered the lions were scared of a moving light. An idea was born. Three weeks and much repairing later, Richard invented a system of lights that flash around the cow shelter, mimicking a human walking around with a flashlight. His system is made from broken flashlight parts and an indicator box from a motorcycle. “The only thing I bought was a solar panel(电池板), which charges a battery that supplies power to the lights at night.” Richard says. He calls the system Lion Lights.
His simple solution was so successful: his neighbors heard about it and wanted Lion Lights, too. He put in the lights for them. From there, the lights spread and are now being used all around Kenya. Someone in India is trying them out for tigers. In Zambia and Tanzania they’re being used as well.
1. Why do local people kill lions?A.To attract tourists. | B.To protect their cows. |
C.To sell them for money. | D.To scare away large animals. |
A.That the lights will cost nothing. |
B.That the system can protect lions. |
C.That the lions are afraid of light. |
D.That the cows are lawfully killed. |
A.Lion Lights | B.Protecting Lions |
C.Endangered Cows | D.Lion-proof Fences |
【推荐1】Bangladesh has a large population. The nation depends on rice as its main food. Growing rice requires a lot of water and energy, especially during the dry season from January to June when farmers mostly rely on groundwater. This results in serious reduction of groundwater as well as greenhouse gas emissions(排放).
Researchers from the University of Washington and Bangladesh’s Ministry of Agriculture have developed a system called Integrated Rice Advisory System (IRAS), which uses satellite data from NASA and its partners to give farmers important information.
IRAS works by combining satellite data on water use, rainfall, and weather forecasts with crop water demand(需求)characteristics to produce location-specific suggestions for farmers. The suggestions tell farmers how much water they have, how much they are using, and how much they need for their crops. They also warn farmers if they have over-or under-watered their fields.
The IRAS team states that the system will help reduce agricultural water waste by about 30 percent, cut fuel use by 45 percent, save S115 million yearly, and lower carbon emissions by 300,000 tons per year.
IRAS is an example of how global cooperation and the sharing of important data among nations can help improve food security, water management, and environmental protection around the world. “In addition to being affordable and convenient for farmers, the method can help the world become more water-efficient and energy-efficient in growing food,” said Faisal Hossain, leader of IRAS.
The IRAS team completed its first nationwide effort in June 2023, after working with staff from Bangladesh’s Department of Agricultural Extension and Agro-Meteorological Information Service to set up the system. Faisal Hossain and his colleagues hope to broaden the reach of IRAS in the future, and apply it to other crops that demand large amounts of water, like sugar cane. “We believe that this affordable tool will be applied to any area where we know what crop is being grown and what their crop water demand characteristics are,” he said.
1. How does IRAS mainly serve farmers?A.By collecting data about weather. | B.By monitoring the growth of crops. |
C.By guiding them on water management. | D.By helping them look for new groundwater. |
A.By listing related data. | B.By giving an example. |
C.By making a comparison. | D.By referring to a research report. |
A.The specific technology used in the system. |
B.Future challenges of applying the system. |
C.Farmers’ opinions on the system. |
D.The importance of the system. |
A.It will be well-received in the future. |
B.It encourages international cooperation. |
C.It can only be used on crops in dry places. |
D.It requires better education on water protection. |
【推荐2】Inspiration 4, as the mission is called, is indeed impressive, the first time “normal people” with minimal training will leave the planet, enter orbit, and return to Earth days later — a considerable advancement from the 11-minute joy ride Jeff Bezos took in July. But despite the lofty name, don’t be fooled: Inspiration, is not the victory for everyone that it presents itself to be.
I’ve been hugely critical of the billionaire space race, which incautiously pollutes our atmosphere and has the enormous opportunity cost of time, money, resources, and energy that could go toward more urgent planetary issues, like world hunger and global poverty. Clean energy research, sustainable transportation innovations, and the creation of high-paying jobs in green sectors would do far more for the average non-billionaire than a rocket ship ever will.
Still, we’re being tricked and get convinced that SpaceX’s civilian mission is “inspiring” because its passengers aren’t professionals. The Falcon 9 rocket was chartered by businessman Jared lsaacman, who has successfully shaped the mission as a worthy cause for Wednesday’s voyage is part of a large fundraising effort for St. Jude Children’s Research Hospital.
As for his guests, lsaacman is taking St. Jude physician assistant Hayley Arceneaux; Sian Proctor, a passed-over finalist from NASA’s astronaut program; and Chris Sembooski, who was gifted his spot after his friend won it in a raffle. No doubt, the primary reason for the journey is marketing for private space travel.
It’s hard not to be won over! But that’s also the point. “Civilian” missions like Inspiration make space travel appear to be “accessible to all”, despite the fact that spaceflight will be “a hobby only reserved for billionaires and cent-millionaires for many years to come,” as Business Insider writes. Yet if space tourism companies can get the general public to support them, then they’ve effectively gotten us to buy into something that does not actually do any good to us. Additionally, whenever something earnestly asks you to consider it an “inspiration”, it’s always good to ask yourself why.
1. According to the passage, Inspiration 4 is ________.A.the first civilian mission to orbit the earth |
B.a minute-long joy ride to leave the planet |
C.the first space trip for people without training |
D.an impressive spaceflight experienced by professionals |
A.interesting | B.noble | C.common | D.original |
A.It slows the creation of high-paying jobs | B.It worsens world hunger and global poverty. |
C.It wastes time, money, resources and energy. | D.It accelerates the research process of clean energy. |
A.Space trip: Inspiration for Civilians | B.Inspiration4: Not Really an Inspiration |
C.Space tourism: A Privilege for Billionaires | D.Private Spaceflight: A Worthy Cause for All |
【推荐3】Farming today not only sends out greenhouse gas but destroys wildlife habitats. Agriculture now takes up half of Earth’s hospitable land surface, at the expense of these habitats. So I hope to restore current farmland to its natural state by ending the vegetation (植被) stage of crop-growing.
My PhD research at Wageningen University in the Netherlands is inspired by alternative, indoor methods of food production, such as farming leafy green vegetables vertically (垂直地) and growing meat in a laboratory. I wondered — if you can grow meat without an animal, can you grow fruit without a plant? This could be done inside, which might help us to return some agricultural land to nature.
During my master’s programme in agricultural engineering, I discussed indoor fruit production with my professor. He eagerly invited me to write a master’s paper on the subject of growing fruits without the plant.
The main task of my PhD is to collect immature fruit or flowers from tomato plants, and try to grow the stems (茎) into healthy, high-quality tomatoes in the lab. Ultimately, we want to produce fruit from tomato undifferentiated cells from which new plant organs can grow — and skip using a plant entirely.
I had achieved some early results of my research, when I was testing different growing conditions at different stages of tomato development. The lighting is an energy-efficiency measure; we use blue and red LEDs, the best colours for photosynthesis.
Some people get excited about the possibilities of my work, but most are doubtful, which I understand. In the past, people have rushed into using food technologies, such as cage-grown chickens and the extensive use of fertilizer, without considering the potential downsides. An important part of my PhD programme will be to assess the sustainability of my method.
1. What can we learn about farming today from the first paragraph?A.It’s demanding. | B.It’s conventional. |
C.It’s unsustainable. | D.It’s transformative. |
A.He expressed great enthusiasm. | B.He rejected it immediately. |
C.He began to do an experiment. | D.He asked him to stop researching. |
A.To clarify others’ confusion. | B.To test out his own idea. |
C.To produce more tasty food. | D.To voice his views on plants. |
A.Approving. | B.Negative. | C.Indifferent. | D.Unclear. |
【推荐1】A baby seal robot from Japan has came to the U.S. It's been sold in Japan for several years, but now the company has created a Florida-based unit, Paro Robots U.S. Inc., to sell the creature to places like nursing homes and hospitals. The robot, named Paro, is marketed as a therapeutic(治疗的)device that can help comfort people who have problems that can lead to social isolation(隔离).
Takanori Shibata, a Japanese engineer, invented Paro. He says the robot, which weighs about 6 pounds, is able to respond to touch, light, and sound.
Shibata says he tried making robotic cats and dogs, but that people didn't find those convincing. "They expected too much,"' he says, and would compare the robot to real animals they had known. Few people have ever seen a live baby seal, so they aren't likely to draw comparisons between the robot and the real thing. So they accept Paro as a cute little companion.
The Vinson Hall Retirement Community in McLean held a recent event to showcase the robot and Virginia Long slowly came into the activity room. When a nurse put the robot on her lap, it began to shake slightly, and Long talked to it gently. “Why are you shaking? Are you cold?" she asked. The robot made a high sound, and Long laughed. She said she used to have a cat, “but somebody stole him." "Petting a seal is unusual," she said, "but a lot of people have strange animals.
But some experts say a robot is no replacement for a real animal. "One of the things that we've learned is that it is the unexpected and natural behavior of the living creature that adds so much value to people's experience. Any kind of newness can get the attention of people who are lonely and bored, but that doesn't necessarily help them live a meaningful life. It doesn't solve the problem that is really causing their lack of enjoyment of life," says Bill Thomas, a professor at the University of Maryland, Baltimore County.
1. What is the role of Paro?A.To look after baby seals. | B.To give relief to Patients. |
C.To replace home-raised pets. | D.To Provide medical examinations. |
A.Disappointed. | B.Astonished. |
C.Concerned. | D.Amused. |
A.She refused to get close to it. | B.She showed it much affection. |
C.She regarded it as her new cat. | D.She was frightened to talk to it. |
A.It is of great value to people. |
B.It is not of great use in solving real problems. |
C.It fails to catch older people's interest. |
D.It can take the place of a living creature. |
【推荐2】More than 10 million Chinese cultural relics (文物) have been lost overseas, most of which were stolen and illegally shipped out of China during the times of war before 1949. About 1.67 million pieces are housed in more than 200 museums in 47 countries, which accounts for 10 percent of all lost Chinese cultural relics, and the rest are in the hands of private collectors.
Most of these treasures are owned by museums or private collectors in the United States, Europe, Japan and Southeast Asian countries. There are more than 23,000 pieces in the British Museum, most of which were stolen or bought for pennies more than 100 years ago.
The major method to recover these national treasures was to buy them back. In some cases, private collectors donated the relics to the government. Also the government can turn to official channels (渠道) to demand the return of relics.
In 2003 a priceless bronze pigs head dating from the Qing Dynasty was returned to its home in Beijing after it was removed by the Anglo French Allied Army over 140 years ago. Macao (企业家) Stanley Ho donated 6 million yuan to buy it back from a US art collector and then donated it to the Poly Art Museum in Beijing.
Although buying back is the most feasible way to recover the lost treasures, limited funding is always a big headache.
In recent years, the Chinese government has improved efforts to recover the precious cultural relics lost overseas. It has started a national project on the recovery of the treasures and has set up a database (数据库) collecting relevant information. It has signed several international agreements with many countries on this matter, and is also looking for international cooperation to recover the relics by working closely with several international organizations.
1. What is the passage mainly about?A.How to recover cultural relics. |
B.The efforts to recover Chinese cultural relics. |
C.Stanley Ho donated a bronze pig’s head to Beijing. |
D.Chinese cultural relics were stolen by the Anglo French Allied Army. |
A.have been recovered by the Chinese government | B.were bought for little money by foreigners |
C.are owned by private collectors | D.are housed in foreign museums |
A.possible | B.difficult | C.popular | D.careful |
【推荐3】Are you frequently overwhelmed by the feeling that life is leaving you behind, particularly when you look through social media sites and see all the exciting things your friends are up to? If so, you are not alone.
FOMO, or Fear of Missing Out, refers to the perception that other people’s lives are superior to our own, whether this concerns socializing, accomplishing professional goals or generally having a more deeply fulfilling life. It shows itself as a deep sense of envy, and constant exposure to it can have a weakening effect on our self-respect. The feeling that we are always being left out of fundamentally important events, or that our lives are not living up to the image pictured by others, can have long-term damaging psychological consequences.
While feelings of envy and inadequacy seem to be naturally human, social media seems to have added fuel to the fire in several ways. The reason why social media has such a triggering effect is tied to the appeal of social media in the first place: these are platforms which allow us to share only the most glowing presentations of our accomplishments, while leaving out the boring aspects of life. While this kind of misrepresentation could be characterized as dishonest, it is what the polished atmosphere of social media seems to demand.
So how do we avoid falling into the trap of our own insecurities? Firstly, consider your own social media posts. Have you ever chosen photos or quotes which lead others to the rosiest conclusions about your life? Well, so have others and what they’ve left hidden is the fact that loneliness and boredom are unavoidably a part of everyone’s day-to-day life, and you are not the only one feeling left out. Secondly, learn to appreciate the positives. You may not be a regular at exciting parties or a climber of dizzying peaks, but you have your health, a place to live, and real friends who appreciate your presence in their lives. Last of all, learn to shake things off. We are all bombarded daily with images of other people’s perfection, but really, what does it matter? They are probably no more real than the most ridiculous reality TV shows.
1. What can frequently experiencing FOMO lead to?A.Harm to one’s feeling of self-value. | B.A more satisfying and fulfilling social life. |
C.Damage to one’s work productivity. | D.Less likelihood of professional success. |
A.The primary reason for FOMO is deeply rooted in social media. |
B.Our own social media posts help us feel much more confident. |
C.People who don’t share posts on social media are more bored. |
D.Social media’s nature enhances envious feelings and self-doubt. |
A.To emphasize how false what we see on social media can be. |
B.To indicate how complicated social media has turned to. |
C.To figure out how popular and useful social media has been. |
D.To point out how educational value reality TV shows reflect. |
A.Myths and misconceptions about FOMO | B.FOMO: what it is and how to overcome it |
C.How FOMO is changing human relationships | D.We’re now all in the power of “FOMO addiction” |