1 . Urban planners may soon have a new way to measure traffic jams. By putting in the different routes by which vehicles can travel between locations, researchers have developed a new computer algorithm (运算法则) that helps quantify regions of jams in urban areas and suggests ways around them.
The study, published in the Journal of Physics: Complexity, used traffic speeds from taxis in New York City to demonstrate how road infrastructure (基础设施) and driver behavior can create complex road networks that differ among cities.
The team approached the issue by designing a computer algorithm to capture the topology-or relationship between the different routes between locations-of road networks. “We found that the most significant traffic bottlenecks in Manhattan seem to arise as a result of the city’s structural layout,” said study co-author Daniel Carmody. “For example, the fact that a bridge enters Manhattan at a range where traffic is already limited due to Central Park slows traffic in the area considerably.”
The researchers performed a comparative analysis using traffic patterns in Chengdu, China, to test if the algorithm works equally well in areas with different layouts. Manhattan has a long and thin structure, while Chengdu is round. There are significant differences in the way traffic moves between these two different setups, the researchers said.
“The bottlenecks in Chengdu seem to arise due to the function of the buildings in a particular area,” Carmody said. “For example, it is hard to travel in and out of the central business district in Chengdu because of the large amount of traffic alone. Beltways, or faster streets around busy areas, have emerged in circles around this area, which is not surprising because this feature was intentionally built into the city.”
In Manhattan, the bridges and underpasses that form the entry and exit points cause traffic slowdowns. However, in lower Manhattan, where drivers seem to obey the lower posted speed limits, traffic moves more smoothly, forming a new traffic beltway with the southern end of Central Park acting as a block between lower and central Manhattan.
“It surprised us that there is an emergent beltway in such a busy area of Manhattan,” Carmody said. “This indicates that, unlike in Chengdu, beltways seem to arise from driver behavior even when they aren’t part of the structural plan of a traffic network.”
“The researchers have imagined that this technology could give urban planners a means to quantify traffic patterns, leading to better traffic,” Carmody said. “As methods of transportation develop, new problems will emerge, and we hope that our tools will give planners new ways to measure what is going on with city traffic.”
1. According to the new study, what contributes to traffic jams in Manhattan?| A．The number of bottlenecks and beltways. |
| B．The location of bridges and underpasses. |
| C．Road facilities and driver behavior. |
| D．Road signs and urban population. |
| A．compare the layouts of the two cities |
| B．find better infrastructure for one city |
| C．design traffic patterns with the algorithm |
| D．assess the effectiveness of the algorithm |
| A．Because of lower posted speed limits. |
| B．Because drivers follow the traffic rules. |
| C．Because it is planned in the traffic network. |
| D．Because a beltway has emerged around the area. |
| A．City planners. |
| B．Slower drivers. |
| C．Infrastructure developers. |
| D．Road sign designers. |
2 . Hartley got to Gentral Slalion nearly an hour before his train was due to leave. A lifetime in the theatre had given him a healthy — indeed excessive (过分的) — sense of punctuality; a lifetime of unwanted cups of coffee, constant checking of the time, yet another turn around the block before that all too often pointless, tiresome audition (试镜).
Hartley was 75 — pretty fit for his age, legs holding lip, memory still ticking over nicely — though the occasions for punctuality were now rather fewer. But he was a creature of habit and couldn’t change now.
He repaired to the restaurant purchased a coffee and a blueberry muffin, tired and failed to find a litter-free table. The coffee was awful, the muffin was stale — but the coffee was always awful, the muffin always stale. Hartley refused to let himself be annoyed. His visit to the city had not been without its pleasures. Lunch with an old actor-chum (好友), then a film — regrettably not utilizing (利用) his own talents — had rounded out an agreeable day.
Hartley was a good actor, although the calls on his talents were now infrequent. But really, he thought draining his awful coffee, he’d had a reasonably good career. Something to be proud of. But he’d never had that break-through part.
He headed for his platform. Just as the train was about to pull out a man ran down the platform, jumped aboard as the door slammed shut and sank into the seat next to Hartley.
“Cutting it a bit fine”, he said.
“Indeed”, Hartley replied. “A close run thing”.
The man — forty-ish, amiable looking — gave him an amused glance.
This brief exchange served as an adequate ice-breaker and they chatted their way through the outer suburbs and into the countryside. Having satisfactorily disposed of the sad state of the railways, country versus city living, his neighbour asked Hartley what he did—or had done—for a living.
Hartley hated telling people he was an actor. He was not ashamed of his job. Not in the least, but he had long tired of reactions ranging from “what have I seen you in” to “how do you learn all those lines”.
So in situations like this he simply selected an occupation from a former role. Bit risky, of course. You say you’re a doctor and find yourself meeting the quizzical（疑问的）gaze of a heart surgeon. But he’d never been caught out and it was harmless enough game, Hartley felt. It amused him, and he’d given some damn good performances too.
“I’m a lawyer”, he replied. “Retired several years ago. Property law. Bit of criminal stuff”.
The train was slowing down. The man glanced out of the window.
“My station. I had you quite wrong then”.
He stood and took down his briefcase from the overhead rack.
“Yes, I’d have said you were an actor. The voice especially. Still, lawyers are actors in a way, don’t you think? Plenty of drama in a courtroom”.
The train drew into the station.
“I’m a film director. Casting a feature at the moment. You study faces. On the train. Everywhere. Always on the lookout. Anyway, enjoyed our chat. Bye.”
1. What did Hartley think of his not telling his occupation?| A．Harmful to his acting career. | B．Amusing despite the risk |
| C．Helpful to protect his identity | D．Upsetting when caught out. |
| A．He assumed Hartley had given another answer. |
| B．He understood Hartley’s profession was acting. |
| C．He thought Hartley practiced a different profession. |
| D．He mistook Hartley for another person. |
| A．shows the readers how unexpectedly Hartley’s career ends |
| B．describes Hanley’s shock on finding the man is a director |
| C．confirms Hartley's lack of luck in spite of his acting skills |
| D．proves the man will reconsider giving Hartley a chance to act |
| A．Acting up | B．Employ talents |
| C．Selecting an occupation | D．Casting a feature |
Shooting down an ice-covered track, a bobsled（大雪橇）can go faster than 80 miles an hour, and riders can feel force five times stronger than the pull of gravity. A race can be won or lost by one hundredth of a second. How do bobsleds go faster than cars on a highway? The answer is a combination of athletics and science.
At the start of a race, the crew push their sled, building up speed before they jump in for the ride. For months before the race, the crew have built up power in their legs. The push is the crew's only chance to add speed. All other work goes into keeping friction and drag（摩擦力和阻力）from slowing the sled down.
The design of the sled's runners（滑板）reduces their friction with the ice. The friction of a moving runner melts a little ice right under the runner, and the runner rides on that thin layer of water. The runners are rounded on the bottom. Runners that are too flat may not melt enough ice for fast ride. Runners that are too round may become too warm, softening the ice and slowing the sled down. No amount of rounding is perfect for all races because the hardness of the ice depends on the weather on race day.
Bobsleds used to be open. The riders did not sit inside a hull（外壳）. As the crew sped down the track，the air would create drag. Today, a sled's hull reduces drag by splitting the air in front of the sled and making it flow smoothly along the slides. As with the runners，strict rules apply to the hull. For example，no team may add any part that would create helpful air currents.
Reducing friction and drag creates another challenge: high speeds. “The faster the sleds car travel on the run, the more thrilling the race,” one research team wrote. “But the track must not be too fast: he crew still need to be able to reach the bottom safely.”
1. What's the text mainly about?| A．The shape of the sled. | B．The design of the runners. |
| C．The safety rules applying to the sled. | D．The elements relating to the sled's speed |
| A．Proper amount of melted ice is needed for a fast ride. |
| B．The rounder the runners are, the faster the sled goes. |
| C．Thin layer of water would drag the runners backward. |
| D．A sled's movement has nothing to do with weather. |
| A．It's comfortable to sit in. | B．It leads to beneficial air flow. |
| C．It helps to create a safe ride. | D．It's free from strict rules. |
| A．Safety is the most important. | B．Keeping high speed is difficult. |
| C．Riders' desire to win is understandable. | D．The crew's cooperation is necessary. |
4 . I go to a gym in west London, always unwillingly. Exercise is too exhausting and boring. Always was. At school I made believe that I had headaches and parental notes too, to get out of PE classes and compulsory games. Now, twice a week, I dutifully get on cycling machines and other equipment and make myself work out for an hour. To get through the difficult hour, I people-watched: young and old, fit and unfit and Clayton Rose, one of the instructors.
Clayton is a personal trainer not only to body perfectionists, but to people who are mentally and physically disabled, the obese and hopeless. He treats them all the same. I have witnessed him listening keenly to a middle-aged working-class woman who goes on and on about her life, holidays, everything. Slim and attractive now, she was once so heavy that she was in a wheelchair. I have seen him calm down a young man with Tourette's syndrome(抽动症)and get him on a treadmill. I have also watched him pushing and coaching strong, cool men.
Clayton was shocked when I said I wanted to write about him. “Why? You know I'm not educated? I'm not clued up about politics and all that. Just an ordinary guy.”
He grew up in Twickenham, where his dad worked in a timber yard, his mum in an office. After college, the young man got into personal training and found his work. One of his best friends got seriously ill and was given months to live. Clayton put him on a program that kept him alive for almost five years: “I don't earn much, but I love my work; training and talking really helps people who don't have confidence, who are lonely, afraid, sick. Lots of people can't step into a gym. They need someone they can trust, someone who will be on their side.
The gym recently updated its equipment. The flashy new stuff confuses and upsets disabled customers. Me too. The private firm running these centers made decisions without considering these needs. Clayton is managing the chaos with grace and strength. Last week, when a young woman in a wheelchair started sobbing loudly, he calmed her down, restored her dignity, superhumanly contained his anger.
One of his colleagues thinks Clayton's “a legend”. He is, and doesn't know it—a rare thing in this age of extreme narcissism(自恋)and monetized(货币化) everything.
1. Why was I unwilling to go to a gym?| A．Because I suffered from headaches. |
| B．Because I had bad memories of PE classes. |
| C．Because I had to watch a large crowd exercising |
| D．Because I felt it tiring and no fun |
| A．He brings out the best in them. | B．He helps them with illness advice |
| C．He treats them differently. | D．He focuses on body perfection. |
| A．Reasons to go to a gym. | B．An instructor inspiring confidence. |
| C．Exercise with push and inspiration. | D．Rays of hope in the age of narcissism. |
5 . Accompanied by her father, using a combination of aid and free climbing and taking advantage of some special equipment and ropes for protection, 10-year-old Selah made it to the top of El Capitan on June 12 after five days of big wall climbing.
Climbing the challenging and adventurous Nose route of El Capitan was a labor of love for Selah in more than one way. Her parents , Mike and Joy Schneiter, fell in love on this 3,000- plus-foot huge rock and she has always wanted to feel the way that her parents felt when they were up there together. Selah showed great interest in rock climbing at an early age. She wore her first rock-climbing equipment shortly after she learned to walk. She first dreamed of climbing El Capitan when she was 6 or 7.
El Capitan is a famous mountain-sized rock in Yosemite National Park. Getting to its top is no easy task. It's taller, as reported, than the tallest building in the world-Dubai’s Buri Khalifa. El Capitan and its difficult Nose route, which runs more than 3,000 feet high up the center of the rock's face, is considered one of the world's hardest big wall climbs and has attracted the best climbers over time. But never before had a youngster accomplished it.
Selah's achievement caught national attention. Outside Magazine called her the youngest documented person to climb the Nose. Ken Yager, president of the Yosemite Climbing Association, said he also couldn't think of anyone younger who has done it.
Selah is humble about her El Capitan accomplishment. "I'm not necessarily a special kid or anything like that, she said. "There were a few times when I would be so worn that it would kind of discourage me from holding on. But overall, it was just great to keep plugging away.”
Selah shared this advice for other young climbers dreaming of big walls, "It doesn't take necessarily a super special person to do something like that. You just have to put your mind to it.”
1. What do we learn about Selah climbing El Capitan?| A．She began her climbing on June 5. |
| B．She got inspired by her family history. |
| C．She managed without any external help. |
| D．She was the first female to reach the top. |
| A．To state El Capitan's height. |
| B．To prove El Capitan's popularity. |
| C．To introduce El Capitan's location. |
| D．To stress the challenge of climbing El Capitan. |
| A．Determined. | B．Generous. |
| C．Warm-hearted. | D．Fortunate. |
| A．Dream big and aim high. |
| B．Be committed to your ambition. |
| C．Chance favors the prepared mind. |
| D．Nothing is impossible for a genius. |
6 . Just as a hungry brain craves (渴望) food, a lonely brain craves people. A new brain study demonstrates this. After being left alone, it shows people's brains would be activated at the sight of other people. The action was in the same brain region that speeds up when a hungry person sees food.
Livia Tomova, a neuroscientist, who studies how the brain produces mental activities, and her colleagues began this study. They recruited (招募) 40 people. On one day, the participants had to fast—not eat anything at all—for 10 hours. On another day, the same people were placed in a room for 10 hours. They couldn't see anyone. No friends, no family and no social media. They weren't even allowed to check their email. After both days, Tomova and her colleagues put the people in a MRI machine. It shows activity in the brain by tracking how much blood is flowing to each region.
At the end of each day, the participants showed high activity in a brain area called the midbrain. The scientists were interested in two, small areas within it. Both areas produce dopamine, a chemical that is important in craving and rewards. The two areas activated when hungry participants saw pictures of tasty pizza or juicy hamburgers. After the volunteers had been isolated, those brain areas became active when they saw social activities they missed. It might be playing sports or chatting with friends.
The midbrain plays an important part in people's motivation to seek food or friends. In fact, it responds to food and social signals even when people aren't hungry or lonely. But hunger and loneliness increased the reactions and made people's responses specific to the thing they were missing. And the more hunger or isolation the volunteers said they were experiencing, the stronger the activity in this part of the brain. Tomova and her colleagues published their results November 23 in Nature Neuroscience.
1. How does Tomova test out the result of the study?| A．By stimulating desire. | B．By controlling blood flow. |
| C．By monitoring brain activity. | D．By examining mental activities. |
| A．It consists of two areas. | B．It helps motivate desire for food. |
| C．It stops working when people are full. | D．It decreases responses to lost friends. |
| A．A midbrain area. | B．A social activity. | C．A volunteer. | D．A hamburger. |
| A．Dopamine—a Sure Sign of Age | B．Midbrain—a Nest for the Thoughts |
| C．Hunger Makes Mental Health Struggle | D．Loneliness Makes Our Brains Need People |
7 . The American Bumblebee—a species once more commonly seen around Southern Ontario—is endangered, according to a new study led by York University.
The finding, published in Journal of Insect Conservation, found the native North American species, one of bumblebee species, is facing upcoming local extinction(灭绝) from Canada. Many bumblebee species are rapidly declining across North America, but are important pollinators(传粉昆虫) needed to grow Canada's crops including apples, tomatoes, and blueberries, as well as countless types of trees, shrubs, and wildflowers.
“This species is at risk of extinction and it's currently not protected in any way despite the sharp decline,” said Assistant Professor Sheila Colla, an expert in bees and endangered species in the Faculty of Environmental Studies.
“Now that we have assessed the degree of the decline and located where the remaining populations are, we can look more closely at habitat(栖息地) requirements to design an effective conservation management plan so that this species does not disappear from Canada forever,” said Colla, who co-authored and helped design the study.
Colla has been studying bumblebees in Southern Ontario since the mid-2000s. This study relies on the annual data that she and her fellow researchers have collected.
The study's research team used data from three sources. They analyzed Southern Ontario data from the citizen science program, Bumble Bee Watch, a collaboration(合作) of volunteers who submit bumblebee photos through a website or phone app for experts to identify. The researchers used the Bumble Bees of North America database to obtain records of bumblebee species in Ontario and Quebec dating back to the late 1800s. They also used their own field survey work which allowed them to evaluate the status of the species within its Canadian range, using the globally recognized International Union for the Conservation of Nature（IUCN）Red List assessment criteria.
1. What can we learn about the American Bumblebee?| A．It is commonly seen around Ontario. | B．It is threatened in danger of extinction. |
| C．It is under protection from the government | D．It is to blame for the poor harvest of crops. |
| A．their habitat requirements | B．their remaining populations |
| C．the degree of their decline | D．the local climate condition |
| A．By taking photos of them. | B．By observing their behavior. |
| C．By analyzing the collected data. | D．By establishing global database. |
| A．New ways to protect bumblebee species | B．The American bumblebee at highest risk |
| C．Devotion to studying endangered species | D．Three sources used to study the bumblebees |
8 . Most of our everyday plastic items end up in landfill, left to rot away for many years. But some of it blows away, spoiling the countryside and causing damage to the natural environment and harming wildlife. The problem is most severe in our oceans. Research has found a deserted island in the South Pacific is littered with the highest density (密度) of plastic waste anywhere in the world.
The study described how remote islands act as a ‘sink’ for the world’s rubbish. They become collecting points for fishing items and everyday things including toothbrushes, cigarette lighters and razors-things that we throw away. Dr Jennifer Lavers from the University of Tasmania says “Almost every island in the world and almost every species in the ocean is now being impacted one way or another by our waste.”
This highlights the potentially deadly effect of our disposable (用后即丢弃) culture. When we throw something away, it doesn’t just disappear, it goes somewhere and because of the nature of plastic, it takes a long time to rot away and stays there causing great damage to the ocean’s ecology (生态). And worse still, plastic is broken down into tiny particles over a long period by the wind and the waves, then sea creatures at the bottom of the food chain swallow them. These creatures are eaten by the fish that we eventually consume.
The solution to this problem would be to use less plastic. Several countries now charge for using plastic carrier bags which reduces the amount used and some products now use natural and recyclable materials.
1. What does the author really want to tell us in the first parapraph?| A．It is a good idea to end plastic items in a landfill. |
| B．Plastic items blow away easily in the strong wind. |
| C．It is a bad habit to throw away plastics everywhere. |
| D．Plastic pollution in oceans is a most serious issue. |
| A．The islands begin to sink with much rubbish on them. |
| B．The islands have become gathering places for rubbish. |
| C．The islands are ideal places to hide the plastic products. |
| D．The islands are inaccessible due to the white pollution. |
| A．Impact on sea species. | B．Thrown-away rubbish. |
| C．The nature of plastic. | D．The ocean’s ecology. |
| A．Breaking the balance of ocean ecology. | B．Causing many sea creatures to die out. |
| C．Presenting potential risks to our health. | D．Cutting off the food chain of sea creatures. |
9 . Randy Kraus was disabled. His left side was useless. He'd been a police officer before, and he was strong and able. Now, he felt he could do nothing.
His trouble started with Parkinson's disease, but it didn't end there. In July, 2002, the 60-year-old Kraus went into the hospital for an operation on his brain to control the shaking. But during the operation，he had a stroke. He was paralyzed. The doctor said, “You may never walk again and you might not even be able to talk.”
Kraus found that he couldn't lift a fork or take a drink by himself. Physical treatment was so painful and slow. What did he have to live for? So Kraus held the gun against his head. Feeling the cold metal on his skin, he began to consider the pain he would cause for his wife, daughters and grandchildren. He didn't pull the trigger (扳机)．
Andrew Garud, his exercise physiologist, told him, “You are where you are. The pace would be slow；the pain would be real. But as long as you are alive, you will have the ability to get better.”
After three months of working with Garud, Kraus wanted to see if he could stand.
He could. Then he took three steps, sat down and cried like a baby.
One step, as they say, led to another. Next he managed a short walk along the edge of a boxing ring (拳击台) in the health club. It was the hardest fight of Kraus's life. People at the gym cheered him on. Garud kept saying he could do more. Now, Kraus can brush his teeth，shave himself and get around the house with a walker. Only the disabled can fully understand little success.
1. According to the passage，we can learn that ________.| A．the stroke during the operation on his brain led to Kraus' disability |
| B．Kraus' operation in 2002 was performed by Andrew Garud |
| C．doing exercise can help cure Parkinson's disease |
| D．Kraus will lead a normal life as a healthy person in the future |
| A．Everyone in the world has the right to be alive. |
| B．It's necessary for people to do exercise to keep healthy. |
| C．One should try to lead a better life. |
| D．As long as a person is alive, he will have a chance to be better. |
| A．Optimism. | B．Strong mindedness. |
| C．Sympathy. | D．Generosity. |
10 . Beijing-born Chloe Zhao made a historic win, becoming the first Asian woman director to take home the Golden Globe Award for Best Director on Sunday night in Los Angeles, causing a stir among domestic netizens.
Nomadland, Zhao's third film, grabbed two top awards, including Best Picture, at the 2021 Annual Golden Globe Awards, making her the second filmmaker of Chinese descent after Ang Lee to get the top directorial prize of the 78 year old event, widely considered as an indicator of the Oscars.
Adapted from American journalist Jessica Bruder's 2017 non-fiction book Nomadland: Surviving America in the Twenty-First Century, the film stars the actress Frances McDormand as a 62-year old woman who travels in the vast lands of America in order to explore life as a modern-day nomad (流浪者).
With a short yet glittering resume (简历), Zhao, who was born in 1982 and sent to study overseas in 1998, has gained attention from the first film directed by her Songs My Brothers Taught Me in 2015 before accumulating more popularity for the award-winning The Rider in 2017. The latter helped her to seize the attention of McDormand, who then chose the rights of the Nomadland book.
After being released in international film events since autumn last year. Nomadland has been a favorite of many major festivals, including its victorious win of the Golden Lion Award as the best film at the 2020 Venice International Film Festival.
So far, the film has received more than 90 awards, making it a sought-after competitor in the upcoming Oscars.
Song Dandan, a famous actress and the stepmother of Zhao, sent her greetings on SinaWeibo saying every award won by Zhao has surpassed (超过) the family’s expectations, bringing them huge joy. She added that she hopes Zhao’s success will encourage more Chinese youth to pursue their dreams.
1. What can we learn about Nomadland, the film directed by Chloe Zhao?| A．The film has won no more than two awards |
| B．The film will surely win the Oscar award for Best Picture |
| C．The film is about an old woman exploring life in America as a nomad |
| D．The film was inspired by American journalist Jessica Bruder's fiction book |
| A．her road to success is smooth |
| B．Chloe Zhao is a successful woman |
| C．all her three films are well-received |
| D．the two films contribute to her historic success |
| A．Chloe Zhao makes history at Golden Globes |
| B．Nomadland directed by Chloe Zhao wins awards |
| C．Chloe Zhao wins glory for her family and netizens |
| D．Chloe Zhao’s success will inspire Chinese teenagers |
