1 . A working semiconductor (半导体) has been created from graphene(石墨烯), potentially laying the foundation for a new type of computer with greater speed and efficiency than today’s silicon chips(硅基芯片) allow.
Graphene, a material made from a single layer of carbon atoms, is a good electrical conductor resistant to heat and acids. But a working graphene semiconductor which can be controlled to conduct or separate electricity at will, has evaded scientists. Such semiconductors are key to creating the logic chips that power computers.
The problem has been the lack of what is known as a bandgap. Semiconductors have bands of higher and lower energies and a point—the bandgap—at which excited electrons can jump from one to the other. This effectively allows the flow of current to be switched on and off, so it is either conducting or not conducting, creating the binary system of zeroes and ones used in digital computers.
Now, Walter de Heer at the Georgia Institute of Technology and his colleagues have created graphene with a bandgap and demonstrated a working transistor, an on/off switch that either prevents or allows current to flow through it. De Heer said the electrical properties of a graphene semiconductor were far better than those of silicon chips. “It’s like driving on a rocky road versus driving on a freeway,” he said.
Silicon chips are cheap to make and backed by extensive production facilities, but we are reaching their limits. Moore’s law states the number of transistors in a circuit will double roughly every two years, but the rate of downsizing has slowed recently as engineers reach circuit concentration beyond which electrons can’t be reliably controlled.
“You can use all the technology the whole semiconductor industry is totally comfortable with to scale up this process,” says David Carey at the University of Surrey, UK. But he suspects the world will soon shift to graphene chips, because silicon has such a head start. “Most people working on silicon are bombed daily by new, wonderful materials that are about to replace it and none of it’s ever happened,” he says.
1. What does the underlined word “evaded” probably mean in paragraph 2?| A．Surprised. | B．Attracted. | C．Annoyed. | D．Puzzled. |
| A．It excites the jump of electrons. | B．It creates the system of zero s and ones. |
| C．It balances the higher and lower energies. | D．It allows the on and off of the current flow. |
| A．Superior electrical characteristics. | B．Stronger production support. |
| C．Lower development cost. | D．Slower downsizing rate. |
| A．Uncaring. | B．Favorable. | C．Doubtful. | D．Disapproving. |
2 . London Theatre Shows
Alice In Wonderland
Each ticket to the show includes free entry to Kew Gardens., Alice in Wonderland is playing at the Kew Gardens from 22 July to 28 August 2023.
Running time: 1 hour 10 minutes with no interval (幕间休息)
Performance days
Matinees (日场): Wednesday, Thursday, Friday, Saturday, Sunday
Important information: Children under 2 years old go free.
Back To The Future: The Musical
It is based on the iconic Back ta the Future films. Back to the Future: The Musical tickets at the Adelphi Theatre, London are available to book for performances up to 11 February 2024.
Age restrictions: Suitable for general audience aged 6+. Children under 3 will not be admitted.
Running time: 2 hours 40 minutes (including interval)
Performance days
Evenings; Monday, Wednesday. Thursday. Friday, Saturday, Sunday
Matinees: Thursday, Saturday, Sunday.
Blippi: The Wonderful World Tour
This show sees Blippi in the ultimate curiosity adventure. Dance, sing, and learn with Blippi as he discovers what makes different cities unique and special. Blippi: The Wonderful World Tour runs at Rose Theatre, Kingston from 29 August to 9 September 2023.
Age restrictions: Recommended for ages 2+.
Running time: 1 hour (no interval)
Performance days
Matinees: Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Dinosaur World Live
Join our brave explorers across unchartered territories to discover a pre-historic world of remarkably life-like dinosaurs. Dinosaur World Live runs from 11 August to 3 September 2023 at Regent’s Park Open Air Theatre, London.
Age restrictions: 3+
Running time: 50 mins + a 15-minute post show
Performance days
Matinees: Monday, Tuesday, Wednesday, Friday, Saturday, Sunday
1. What do we know about Back to the Future: The Musical?| A．It has no performances on Tuesdays, |
| B．Booking starts on 11 February 2024. |
| C．Children under 3 years old can go free. |
| D．It lasts 2 hours 40 minutes without intervals. |
| A．Kew Gardens. |
| B．Adelphi Theatre. |
| C．Rose Theatre, Kingston. |
| D．Regent’s Park Open Air Theatre. |
| A．Alice In Wonderland |
| B．Dinosaur World Live |
| C．Back To The Future: The Musical |
| D．Blippi: The Wonderful World Tour |
3 . Science fiction has long entertained the idea of artificial intelligence becoming conscious (有意识的). Many researchers say that AI systems aren’t yet at the point of consciousness, but the pace of AI evolution (发展) has got them considering: how would we know if they were?
To answer this, a group of 19 neuroscientists (神经系统科学家), philosophers and computer scientists have come up with a checklist of standards that, if met, would indicate whether a system has a high chance of being conscious. The authors made the effort because “it seemed like there was a real lack of detailed, thoughtful discussion of AI consciousness,” says co-author Robert Long, a philosopher at the Center for AI Safety.
The team says that a failure to identify whether an AI system has become conscious has important moral implications. If something has been labelled “conscious”, according to co-author Megan Peters, a neuroscientist at the University of California, “that changes a lot about how we as human beings feel that entity (独立存在的个体) should be treated”. Long adds that, as far as he can tell, not enough effort has been made by the companies building advanced AI systems to evaluate the models for consciousness and make plans for what to do if that happens.
One of the challenges in studying consciousness in AI is defining what it means to be conscious. Peters says that for the report, the researchers focused on “phenomenal consciousness”.
Many neuroscience-based theories describe the biological basis of consciousness. But there is no agreement on which is the right one. To create their framework, the authors therefore used a range of these theories. The idea is that if an AI system functions in a way that matches aspects of many of these theories, then there is a greater likelihood that it is conscious.
They argue that this is a better approach to assessing consciousness than simply putting a system through a behavioural test — say, asking ChatGPT whether it is conscious, or challenging it and seeing how it responds. That’s because AI systems have become remarkably good at mimicking (模仿) humans.
1. What does Robert Long say about present research on AI consciousness?| A．It is far from enough. |
| B．It is progressing rapidly. |
| C．It has shown promising insights into it. |
| D．It has learnt a lot from previous research. |
| A．Their final applications. |
| B．How humans treat them. |
| C．Their moral responsibilities. |
| D．How humans make future; plans. |
| A．Providing a definition of it. |
| B．Uncovering the reason behind it. |
| C．Measuring AI’s ability to mimic humans. |
| D．Comparing AI consciousness and human consciousness. |
| A．By observing its responses to digital signals and online questions. |
| B．By checking its understanding of some neuroscience-based theories. |
| C．By comparing its functional patterns with neuroscience-based theories. |
| D．By conducting experiments and tests to measure its level of self-awareness. |
4 . Like many people, Stimpson, who is nearly 80, has noticed an alarming loss of wildlife in his lifetime. The clouds of swifts (雨燕) of his childhood have disappeared.
A loss of nesting (筑巢的) sites is driving the decline of swifts in the UK, whose numbers are believed to have dropped by about 57% in 22 years. These birds — which are now on the UK’s red list — are site-specific, meaning each spring they come back to the same spot after flying thousands of miles from Africa, The problem is that lots of old barns (谷仓) and houses have been upgraded and repaired and nesting sites have disappeared.
Thirteen years ago no one was making swift boxes, so Simpson started, “I’m not a carpenter (木匠), I’m a salesman, but I thought I’d certainly give it a go,” he says. When he started he could make three a day, now on a really good day he can make 30. “The government and big wildlife organisations don’t end up doing much to stop wildlife loss. We seem to have too many pen-pushers and not enough workers,” he says. “We could do an awful lot more than we’re doing.”
He believes local action groups are much more effective and has been working with a number of them. “The number of swift groups that have started up in the last five to eight years is quite staggering. And they seem to go from strength to strength,” he says,
“Swifts are the one thing where an individual can make a significant difference,” says Dick Newell, from Action for Swifts, who has 66 pairs of nesting swifts in his village of Landbeach in Cambridgeshire, 20 of them nesting on his house.
Newell says developers should put swift brick in every new building, and he has been working with housebuilding company Taylor Wimpey to make this happen. Exeter city council has started incorporating tfiem into new buildings, as well as the Duchy of Cornwall, and local councils are getting on board. Others are working on bee bricks and hedgehog (刺猬) holes in new developments.
1. What led to the swifts’ decline in the UK?| A．A loss of food. |
| B．A lack of nesting sites. |
| C．Their being removed from the red list. |
| D．Their deaths during their long journey. |
| A．Curious. | B．Satisfied. | C．Tolerant. | D．Negative. |
| A．Misleading. | B．Shocking. | C．Confusing. | D．Disturbing. |
| A．Build fewer buildings in rural areas. |
| B．Increase buildings made of bricks. |
| C．Include a swift brick in new buildings. |
| D．Give special attention to bees and hedgehogs. |
5 . People generally like to pick out the best-looking fruits and vegetables when shopping for produce (农产品), but Canadian supermarket chain Loblaws is attracting customers with badly-shaped and faulty produce at the price of 30% lower than normal-looking one.
A trial run of the ugly food line, named “Naturally Imperfect”, began with only apples and potatoes to choose from. Consumer demand has been so huge that Loblaws is going to introduce more ugly vegetables and fruits like onions and mushrooms.
All the produce that will be sold through Naturally Imperfect would otherwise have been used in juices, sauces, or soups, or have not been harvested at all. The director Dan Branson explained that this program benefited both food producers who would otherwise have to let abnormal produce go to waste, and consumers who could buy fresh produce at low prices. And he was right, given how popular the line has become.
“It really went well beyond our expectation,” Branson said. “I think it really spoke to the fact that Canadians are out there really looking for some options.”
Of course, Canadians know that beauty is more than skin deep, and they also recognize that they can get the same flavor and nutritional benefits in spite of appearances. The positive response to the initial offering of apples and potatoes showed the opportunity to expand the line and offer more options at a greater price to Canadian families.
“If you grow produce in your backyard, there will be a lot of produce that won’t look as pretty as what you will see in a grocery store”, said Branson. “And nature doesn’t grow everything perfectly. I’d like to think if somebody were to take a No Name Naturally Imperfect apple, put it right beside a No.1 apple, close his eyes and eat them, there would be no difference.”
1. Loblaws is different from other supermarkets in that ______.| A．more fruits are offered at lower prices | B．normal-looking produce is forbidden there |
| C．only apples and potatoes are sold every day | D．imperfect produce is sold at lower prices there |
| A．prevents people from wasting their food | B．happens to be a win-win mode |
| C．teaches food producers how to grow | D．enables consumers to eat more fresh produce |
| A．Canadians are used to eating perfect produce. |
| B．Smart consumers know the importance of ugly produce. |
| C．Loblaws intends to improve customers’ quality of life. |
| D．Customers’ support promotes the development of the ugly food line. |
| A．Imperfect fruits are as tasty and nutritious as perfect ones. |
| B．The world is usually full of imperfect things. |
| C．We should eat imperfect apples with our eyes closed. |
| D．The fruits grown by ourselves are more nutritious than those in the store. |
6 . The living room is cleared. The host taps a wine glass with a knife, and people file in, filling the sofas and chairs that are pushed up against the walls. Soon every seat in the house is taken, and a bottle of schnapps is passed around. Lyon Hansen, who minutes before was knocking about in the kitchen, walks over and picks up a guitar and starts to play. Hoyma has begun.
For one night, homeowners primarily in Sydrugota, a small town on the Faroe Islands, open their doors, inviting friends, family and tourists in to enjoy intimate (亲密的) concerts by local artists. The tradition dates back nearly 500 years to a time when Faroese life had to move underground due to Danish rule. The culture and the language was kept alive in people’s living rooms, where they gathered to sing and tell stories.
The modern Hoyma concert series started as an offshoot (分支) of the G! Festival, an annual musical event on the beaches of Eysturoy every summer since 2002. Around 2007, G! Festival’s creator Jón Tyril, exhausted by all the red tape (繁文缛节) that came with putting on a big music festival, started to dream a little smaller. Specifically, he started to think about tiny concerts held in living rooms—no sound systems or spotlights, the audience made up of as many people as can fit inside a house. The idea resounded in his mind, not only because it didn’t involve any heavy lifting, physically or mentally, but also because it went back to the longstanding Faroese tradition.
Since 2007, Hoyma has featured 20 concerts in ten different family homes in Sydrugota. For Laksá, hosting the concerts is not only fun, but a way to give back, and to ensure the islands survive in the modern world. As in many families, her daughters grew up and left the Faroes. “They studied in the U. K. for nine years, but both came back,” she says. “I actually think that Hoyma is partly the reason why many children from this village that go abroad come back. They are proud of it.”
1. How does the author introduce the topic?| A．By presenting a scene. | B．By evaluating an argument. |
| C．By clarifying a concept. | D．By making an assumption. |
| A．A stage when the G! Festival was needed by the Faroese. |
| B．A period when only local artists were allowed to perform. |
| C．An occasion when people celebrated the encounters with tourists. |
| D．A time when freedom of the Faroese was limited because of Danish rule. |
| A．Economical and varied. | B．Convenient and entirely original. |
| C．Accessible and profitable. | D．Simple and culturally attached. |
| A．Hoyma contributes to the survival of the islands. |
| B．Hoyma reflects the affection between mother and children. |
| C．Hoyma is gaining popularity across the globe in modern times. |
| D．Hoyma becomes enter taining with the involvement of the young. |
7 . Skyscrapers (摩天大楼) are the symbol of urban life and city people are used to seeing tall buildings and apartments. Farms, on the other hand, are associated with rural life. However, there are experts who think skyscrapers should become farms to meet the increasing food needs.
By the middle of this century, some scientists suggest, almost 80% of the earth’s population could live in cities. In addition, the population could increase to 9.1 billion people during that time yet the amount of land available for farming will be the same. If current farming practices don’t change, we will need an area of new land to produce enough food for the planet.
Vertical farms, where urban farmers could grow crops in environmentally friendly skyscrapers, could be the solution. In spite of concerns over high costs, experts want to make it a reality and use these skyscrapers to grow crops.
Vertical farms would have many advantages, supporters say. Unlike traditional farming, vertical farming could be free of chemicals and diseases. Besides, crops would not suffer from problems like flooding. Finally, vertical farms would reduce the cost and negative effects of transporting food over long distances.
Some argue that although crops growing in a tall glass building would get natural sunlight during the day, it wouldn’t be enough. For this reason, vertical farms would need additional light sources, such as artificial light.
Another way of growing fresh food is to build urban farms on rooftops. This more practical approach may be more achievable than the idea of farms in skyscrapers, researchers suggest. Experts agree that innovative farming practices are needed to support the need for more food at affordable costs, both to the farmer and to the consumer, but the best ideas could be yet to come.
1. What primary problem could vertical farming settle?| A．Poor state of rural life. | B．Shortage of food supply. |
| C．High costs for transporting crops. | D．Environmental pollution. |
| A．It can benefit transport industry. | B．It requires little care. |
| C．It can produce organic food. | D．It needs very low cost. |
| A．Farmable land. | B．Light sources. |
| C．Crop diseases. | D．Climate conditions. |
| A．Future Food Needs | B．Symbol of Urban Life |
| C．Farms of the Future | D．Farming on Rooftops |
8 . When handball was introduced to Sri Lankan schools in 2010, I wanted to bring it to my school in a remote village. This became a(n)
40 students aged between 13 and 19
Heshan Pradeep, an alumnus (校友) and member of the Air Force handball team, volunteered to
The
| A．appealing | B．challenging | C．confusing | D．amusing |
| A．regardless of | B．in relation to | C．other than | D．in terms of |
| A．leaving | B．assuming | C．offering | D．creating |
| A．determined | B．resistant | C．forbidden | D．grateful |
| A．woke up | B．grew up | C．sped up | D．signed up |
| A．allow | B．encourage | C．convince | D．force |
| A．Ultimately | B．Occasionally | C．Similarly | D．Unfortunately |
| A．protect | B．contact | C．coach | D．assess |
| A．prospects | B．appliances | C．qualifications | D．facilities |
| A．ended | B．continued | C．changed | D．functioned |
| A．passionate about | B．particular about | C．embarrassed about | D．objective about |
| A．debate | B．compete | C．associate | D．cooperate |
| A．watched | B．hosted | C．reached | D．predicted |
| A．stop | B．free | C．separate | D．excuse |
| A．motivation | B．tendency | C．innovation | D．victory |
9 . Les Brown was a city sanitation worker (环卫工人). But he had a
One day Les went to the local radio station, and told the station manager he wanted to be a disc jockey.
The manager asked, “Do you have any
Les replied, “No, sir, I don’t.”
“Well, I’m afraid we don’t have a job for you.” Les thanked him politely and left.
The station manager
From then on, Les
One day, a jockey named Rock suddenly didn’t feel well. Les was the only other person at the station. Because of his
| A．role | B．reputation | C．chance | D．dream |
| A．refused | B．created | C．discovered | D．shared |
| A．practiced | B．translated | C．taught | D．simplified |
| A．curious | B．previous | C．imaginary | D．fashionable |
| A．interest | B．memory | C．doubt | D．background |
| A．measured | B．forgot | C．underestimated | D．mistook |
| A．education | B．purpose | C．praise | D．income |
| A．step | B．excuse | C．risk | D．test |
| A．found | B．dropped | C．said | D．achieved |
| A．adjusted | B．returned | C．spread | D．relaxed |
| A．stayed up | B．set off | C．showed off | D．gave in |
| A．poorly | B．secretly | C．safely | D．normally |
| A．preparation | B．explanation | C．contribution | D．appreciation |
| A．ignored | B．comforted | C．recalled | D．surprised |
| A．adaptation | B．introduction | C．beginning | D．requirement |
10 . 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. |
