1 . A team of researchers at Brigham and Women’s Hospital, Harvard Medical School, has developed a system to use a smartphone camera to test for viral infections. In their paper published in the journal Science Advances, the group describes their system, which involves the use of an external microchip device and a smartphone system that uses a trained deep-learning algorithm.
As the pandemic has gripped the world for most of this year, scientists have been looking for ways to slow the spread of the next one. In this new effort, the team has developed a smartphone-based system that can be used by non-medical people to test for a variety of viral infections.
The system is made up of a smartphone, an external microchip device and software. Body fluid samples are placed into a channel on the microchip device, which is then dipped in a small amount of H2O2. The resulting reaction leads to the formation of bubbles. The bubbles develop in unique patterns based in part on viruses in the fluid sample. The user points their smartphone camera at the bubbling sample and starts the deep-learning algorithm that has already been trained to identify the patterns and therefore recognize the presence of viruses. The whole process takes about 50 minutes. The researchers have thus far taught their system to recognize just three viruses, Zika and Hepatitis B and C. But testing shows the system to be 99% accurate. They note that their system is more portable and cost-effective than other solutions in the works.
The researchers suggest that their system could be rapidly trained to recognize new viruses if the need arises, and the microchip device could be sent to hot spots in the future. Such technology, the researchers suggest, could help to stop future pandemics if used widely. The researchers also note that the system could be immediately useful in infection prone areas lacking testing labs.
1. What’s the purpose of the text?| A．To advise people to use a new smartphone camera. |
| B．To introduce the development of deep-learning algorithm. |
| C．To explain the invention of a new microchip device. |
| D．To show a new finding about testing for viral infections. |
| A．To educate ordinary people with medical skills. |
| B．To help prevent the pandemic from spreading fast. |
| C．To try to treat an illness with a smartphone camera. |
| D．To make smartphones more portable and powerful. |
①Bubbles of a liquid sample are formed. ②Samples react with H2O2.
③Fluid samples are collected in a special device. ④Viruses in bubbles are recognized automatically.
⑤The software is started to examine the bubbles.
| A．③②①⑤④ | B．③①②④⑤ |
| C．②③①⑤④ | D．②①③④⑤ |
| A．Indifferent. | B．Doubtful. | C．Confident. | D．Curious. |
Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated (展示) a small robotic wheelchair directed by a person's thoughts.
In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.
“Our brain has billions of nerve cells. These send signals through the spinal cord (脊髓) to the muscles to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles.” Tavella says. “Our system allows disabled people to communicate with external world and also to control devices.”
The researchers designed a special cap for the user. This head cover picks up the signals from the scalp (头皮) and sends them to a computer. The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react to commands from the brain.
Prof. Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands. “The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices. One example is this wheelchair.”
He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can benefit from. And the other is to guarantee that they can use the technology over long periods of time.
1. BCI is a technology that can ________.
| A．help to update computer systems |
| B．link the human brain with computers |
| C．help the disabled to recover |
| D．control a person's thoughts |
| A．By controlling his muscles. |
| B．By talking to the machine. |
| C．By moving his hand. |
| D．By using his mind. |
| A．scalp→computer→cap→wheelchair |
| B．computer→cap→scalp→wheelchair |
| C．scalp→cap→computer→wheelchair |
| D．cap→computer→scalp→wheelchair |
| A．make profits from them |
| B．prove the technology useful to them |
| C．make them live longer |
| D．learn about their physical condition |
| A．Switzerland, the BCI Research Center |
| B．New Findings About How the Human Brain Works |
| C．BCI Could Mean More Freedom for the Disabled |
| D．Robotic Vehicles Could Help to Cure Brain Injuries |
3 . We're so attached to plastic, but we're careless consumers. Waste plastic is entering our ecosystems and food chains with untold consequences. Cleaning up our polluted world of plastic may seem a noble, but thankless task. However, some people are seeing economic opportunity in the mission.
Plastic Bank, a social enterprise from Canada, is monetizing plastic recycling while empowering those most affected by the waste. It works to prevent waste plastic from entering oceans by encouraging people in developing countries to collect plastic from their communities in exchange for cash, food, clean water or school tuition for their children. After collection, plastic is weighed, sorted, chipped, melted into balls and sold on as“raw material”to be made into everything from bottles for cleaning products to clothing.
“I saw in large quantities; I saw an opportunity,”CEO David Katz told the audience at the Sustainable Brands Oceans conference in Porto, Portugal on November 14.“We reveal the value in this material,”he added.
Plastic Bank was founded in 2013 and launched on the ground operations in 2014 in Haiti, the poorest country in the Western, Hemisphere, where close to 60% of the population live under the poverty line. As result of poor waste disposal and recycling infrastructure (基础设施)，plastic waste enters rivers or is burned and poses the health threats to the local residents.
The company says i has over 2,000 collectors working in the country, with its full- time collectors on average 63% above the poverty line thanks to the income they make from the project. Through its app based payment system, many collectors now have bank accounts for the first time, and are able to ultimately escape ultra poverty.
“Nothing we're doing is against the laws of physics,”said Katz. “All the technology exists for us to solve and save the world. It's only creative thought.”
1. What is Plastic Bank aimed to do?| A．Test out creative ideas. |
| B．Discover new material. |
| C．Promote plastic recycling. |
| D．Stop people using plastic. |
| A．Purchasing- collecting—recycling. |
| B．Exchanging collecting—purchasing. |
| C．Collecting- exchanging—reproducing. |
| D．Persuading consuming—reproducing. |
| A．Haiti attaches great importance to recycling. |
| B．Many locals benefit greatly from the project. |
| C．Collecting is an efficient way to recycle waste. |
| D．The project has solved unemployment in Haiti: |
| A．Companies stand to ban plastic consumption |
| B．Technology finds its way to kick off poverty |
| C．David Katz speaks at the conference in Porto |
| D．Plastic Bank is fighting against plastic waste |
4 . This month, when earthquakes rocked Southern California on back-to-back days, it was a shocking reminder that we may one day experience the “Big One,” a quake with the power to kill and destroy. However a few people saw something else: a photo opportunity.
Tourists flocked to a large crack in a highway to see evidence of the damage for themselves and, of course, take a quick selfie(自拍).
It was only the latest example of how our modern love of sharing photos we take of ourselves in notable situations is colliding with nature and the world, often in confusing and even dangerous ways.
In Canada, a sunflower farm barred visitors last year after selfie-seekers destroyed flowers and left the land looking like a “zombie apocalypse.”(僵尸启示录) In Spain, a man was gored in the neck last weekend while trying to take a video selfie at the annual running of the bulls in Pamplona.
The selfie phenomenon entered the mainstream after Apple and other phonemakers added front-facing cameras starting in 2010, the same year Instagram and other photo-sharing apps were becoming popular. From 2011 to 2017, more than 250 people died while taking selfies, according to a study by researchers in India, which had by far the highest number of such deaths, followed by Russia and the United States. Many died after drowning, falling or being attacked by an animal. Most were under the age of 30.
It’s easy to be uncomfortable with selfies and even mock them, especially when they’re risky or in bad taste. But some researchers have explored different questions: Why do we take selfies? Can they ever be a healthy form of expression? Can selfies be used for good?
1. Why does the author mention the earthquake happened in Southern California?| A．To show how severe the earthquake is. |
| B．To warn the readers of the dangers in the earthquake. |
| C．To introduce the risky behavior of the crazy selfie takers. |
| D．To show how scared people are when earthquake happened. |
| A．there are too many visitors. |
| B．the farm used to be devastated by selfie seekers. |
| C．the sunflowers are supposed to be well protected. |
| D．the farm owner did not want others to enjoy the beautiful sunflowers. |
| A．the US, India, Russia. | B．Russia, the US, India. |
| C．India, Russia, the US. | D．India, the US, Russia. |
| A．Positive. | B．Negative. |
| C．Ambiguous. | D．Uncaring. |
5 . A ship that sank off the coast of California decades ago was recently reconstructed in detail. The 3D digital model even included hundreds of sponges (海绵动物) that have gathered on the ship’s surface since it sank.
Named American Heritage, the supply ship sank in Santa Monica Bay on May 4, 1995, and for decades its exact location was unknown. Researchers with the Monterey Bay Aquarium Research Institute (MBARI) spotted a strange shape in that area in 2008. But it wasn’t until May 2018 that MBARI scientists identified its exact location and mapped the site in detail, showing what appeared to be a shipwreck (失事船只).
Even then, the identity of the shipwreck was uncertain. Yet another MBARI team revisited the location to do further exploration. They sent remotely operated vehicles (ROVs) and took photos of the damaged ship. Though it was covered with deep-sea sponges and other animals, the scientists were able to spot letters spelling out its name, confirming that the shipwreck was American Heritage.
As one of the MBARI scientists who found American Heritage, chief ROV pilot Knute Brekke had worked on the ship before. And he was on duty with the diving company American Pacific Marine — the owner of American Heritage — the night the ship began taking in water and eventually sank.
MBARI spokesperson Kim Fulton -Bennett said to Live Science about the discovery, “The model is not complete, as floating ropes and poor visibility kept the pilots from getting too close to the wreck. But the 3D reconstruction is detailed enough to show that American Heritage is now home to thousands of sponges. Shipwrecks often turn into the shelter for diverse communities of ocean life.”
1. What is the main idea of the text?| A．A valuable treasure was discovered. |
| B．Special sponges were found under sea. |
| C．3D model reconstructed a sunken ship. |
| D．A sunken ship was gotten out of water. |
① Something strange was found in the area.
② ROVs were sent under sea to take photos.
③ A ship sank in Santa Monica Bay.
④ The identity of the ship was confirmed.
⑤ Scientists tried to locate the shipwreck.
| A．②③⑤④① | B．③①⑤②④ |
| C．⑤③①④② | D．④③①②⑤ |
| A．He was familiar with the sunken ship. |
| B．He was in charge of a diving company. |
| C．He was responsible for the rescue work. |
| D．He was the first one to witness the accident. |
| A．Critical. | B．Doubtful. | C．Amazed. | D．Objective. |
6 . I.M. Pei, the Chinese-American, who was regarded as one of the last great modernist architects, has died at the age of 102.
Although he worked mostly in the United States, Pei will always be remembered for a European project: His redevelopment of the Louvre Museum in Paris in the 1980s. He gave us the glass and metal pyramid in the main courtyard, along with three smaller pyramids and a vast subterranean (地下的) addition to the museum entrance.
Pei was the first foreign architect to work on the Louvre in its long history, and initially his designs were fiercely opposed. But in the end, the French — and everyone else — were won over.
Winning the fifth Pritzker Architecture Prize in 1983, he was thought as giving the 20th century “some of its most beautiful inside spaces and outside forms. His talent and skill in the use of materials approach the level of poetry.”
After studying architecture at the Massachusetts Institute of Technology and Harvard, Pei set up his own architectural practice in New York in 1955.
Designing the John F. Kennedy Presidential Library & Museum in 1964 established him as a name. His East Building of the National Gallery of Art in Washington in 1978 changed people’s ideas of a museum. The site was an odd trapezoid (梯形) shape. Pei’s solution was to cut it in two. The resulting building was dramatic, light and elegant — one of the first crowd-pleasing cathedrals of modern art.
Though known as a modernist, and notable for his forms based on arrangements of simple geometric (几何的) shapes, he once urged Chinese architects to look more to their architectural tradition rather than designing in a western style.
In person, I.M. Pei was good-humored, charming and unusually modest. His working process was evolutionary, but innovation (创新) was never an intended goal.
“Stylistic originality is not my purpose,” he said. “I want to find the originality in the time, the place and the problem.”
1. What can we learn about the result of redevelopment of the Louvre Museum?| A．It was criticized by the French. |
| B．It turned out to be a success. |
| C．It made the Louvre Museum look strange. |
| D．It changed the function of the Louvre Museum. |
| A．He is a master in applying materials. |
| B．He is skilled in writing poems. |
| C．He often combines poetry and construction. |
| D．He gets inspiration from poetry in designing. |
a. Design the John F. Kennedy Presidential Library & Museum.
b. Study architecture at the Massachusetts Institute of Technology and Harvard.
c. Design the National Gallery of Art.
d. Win the fifth Pritzker Architecture Prize.
| A．abcd | B．bacd | C．bcad | D．dacd |
7 . In many countries of the world, people can confidently tell you the meaning of their town or city, but most people who live in Manchester, Oxford or Birmingham would not be able to explain what the name of their city means. The name of every British town and city, however, has a long history.
Two thousand years ago, most people living in Britain were Celts. Even the word “Britain" is Celtic (凯尔特语).Then the Romans arrived and built camps which became cities called “castra". This is why there are so many place names in England which end in "-chester" or “-caster" Manchester, for example.
The Romans never reached Wales or Scotland, and many place names there are Celtic. For example,Welsh place names that begin with “Llan" come from the Celtic word for "church".
After the Romans left Britain, it was attacked by the Anglo-Saxons who were from the area of Europe that is now Germany and Holland. The names of their villages often ended in “-ham" or “-ton". Some got their names from the leader of the village.So Birmingham for example, means "Beormund's village”
The Anglo-Saxons were farmers and the landscape was very important to them, so we have villages called Upton (village on a hill)——a good place to build a village and Moreton (“village by a lake”)where floods could make life hard. Place names that end in “-ford" (a place where you could cross a river) also describe the location of Anglo-Saxon villages.
Finally, in 1066 England became Norman—the Normans gave us the place name "grange", which means farm.
And how about London? Experts cannot agree. The Romans called the city Londinium, but they were not the first inhabitants (居民). People once believed that the United Kingdom’s capital city got its name from the castle of a King called Lud but this is very unlikely. Our best guess today is that the name comes from a Celtic word meaning a fast-flowing river. Like a number of British place names, its history is lost in time.
1. The origin of British place names is unfamiliar to many local people because of| A．the death of local languages |
| B．the long lost history of the names |
| C．their lack of interest in it |
| D．the frequent changes to the names |
| A．on a hill | B．near a castle |
| C．beside a river | D．with a church |
| A．The Celts—The Romans—The Normans—The Anglo Saxons |
| B．The Celts—The Romans—The Anglo Saxons—The Normans |
| C．The Romans—The Celts—The Anglo Saxons—The Normans |
| D．The Romans―The Anglo Saxons—The Celts—The Normans |
| A．River | B．Londinium |
| C．Lud | D．Castle |
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on them. He made the monkeys' blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain' s temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
1. The biggest difficulty in operating on the damaged brain is that _______.
| A．the time is too short for doctors |
| B．the patients are often too nervous |
| C．the damage is extremely hard to fix |
| D．the blood-cooling machine might break down |
| A．taking the blood out of the brain |
| B．trying the operation on monkeys first |
| C．lowering the brain' s temperature |
| D．having the blood go through a machine |
a. send the cooled blood back to the brain
b. stop the blood to the brain
c. have the blood cooled down
d. operate on the brain
| A．a,b,c,d | B．c,a,b,d |
| C．c, b, d, a | D．b, c, d, a |
| A．can last as long as 30 minutes |
| B．can keep the brain's blood warm |
| C．can keep the patient's brain healthy |
| D．can help monkeys do different jobs |
