1 . As the effects of climate change become more disastrous, well-known research institutions and government agencies are focusing new money and attention on an idea: artificially cooling the planet, in the hopes of buying humanity more time to cut greenhouse gas emissions.
That strategy, called solar climate intervention (干预) or solar geoengineering, involves reflecting more of the sun’s energy back into space — abruptly reducing global temperatures in a way that imitates the effects of ash clouds flowing out from the volcanic eruptions. The idea has been considered as a dangerous and fancied solution, one that would encourage people to keep burning fossil fuels while exposing the planet to unexpected and potentially threatening side effects, producing more destructive hurricanes, wildfires floods and other disasters.
But. as global warming continues, producing more destructive hurricanes, wildfires floods and other disasters, some researchers and policy experts say that concerns about geoengineering should be outweighed by the imperative to better understand it, in case the consequence of climate change become so terrible that the world can’t wait for better solutions.
One way to cool the earth is by injecting aerosols (气溶胶) into the upper layer of the atmosphere. where those particles reflect sunlight away from the earth. That process works, according to Douglas MacMartin, a researcher at Cornell University.
“We know with 100% certainty that we can cool the planet,” he said in an interview. What’s still unclear, he added, is what happens next. Temperature, MacMartin said, is an indicator for a lot of climate effects. “What does it do to the strength of hurricanes?” he asked, “What does it do to agriculture production? What does it do to the risk of forest fires?”
Another institution funded by the National Science Foundation will analyze hundreds of simulations of aerosol injection, testing the effects on weather extremes around the world. One goal of the research is to look for a sweet spot: the amount of artificial cooling that can reduce extreme weather events without causing broader changes in regional rainfall patterns or similar impacts.
1. Why do researchers and government agencies work on cooling the earth?| A．To prevent natural disasters. | B．To win more time to reduce gas emissions. |
| C．To imitate volcanic eruptions. | D．To encourage more people to bur fossil fuels. |
| A．More volcanoes will throw out. |
| B．More solar energy will go into space. |
| C．More disasters will endanger the future of the world. |
| D．People will keep burning fossil fuels to keep warm. |
| A．He thinks more research remains to be done. |
| B．He is optimistic about the effect of cooling the earth. |
| C．He is concerned about the reduction in agriculture production. |
| D．He disapproves of the practice of solar climate intervention. |
| A．The rainfall pattern of a region. |
| B．The modest drop in temperature. |
| C．The number of extreme weather events. |
| D．The injection amount of aerosol. |
2 . As heat waves continue to ravage the planet, air conditioners are becoming more and more common. However, these "active" cooling devices are posing problems because the electricity consumption which most people are concerned about and the release of ozone-damaging chemicals worsen the greenhouse gas effect, resulting in the creation of heat islands and further thermal pollution. Therefore, "passive" cooling, which doesn't have such effects, has attracted considerable attention from both scientists and ordinary people in recent years.
In a recent study, a team of researchers from China and US presented an eco-friendly, low-cost smart coating to keep buildings cooler while consuming zero electricity. Infrared radiation-based passive cooling has been investigated since 2014, but challenges, mainly the expensive and unsustainable design, have greatly limited their large-scale and widespread application. Besides, the imbalance in cooling ability of these coatings during the day and night tends to lead to great day-night temperature differences as more heat is lost than gained at night.
The solution therefore requires a "smart" mechanism that can both enhance daytime cooling and minimize nighttime heat loss. To do this, the researchers created a new smart coating comprised of conventional building materials, including titanium dioxide nanoparticles, fluorescent microparticles, and glass microspheres that were engineered to reflect most of the sunlight. Specifically, the titanium dioxide particles effectively reflect sunlight through light scattering（撒播）while the fluorescent particles increase the amount of reflection by changing the absorbed sunlight into fluorescence emissions, which drive more heat away from the building. Meanwhile, the glass microspheres re-send mid-infrared broadband radiation, allowing not only heat loss, but allowing heat exchange to take place between the building and the sky.
The coating was tested on a model concrete building. Through this efficient heat exchange with the sky, daytime cooling was strengthened while nighttime cooling was reduced. The building's inside temperature was always maintained at around 26℃, even when the out-side temperature varied from 24℃ to 37℃ during the day. We believe this new coating will make it to commercialization soon, enabling a sustainable, passive cooling technology that could help to fight climate change and the global energy crisis.
1. What is the virtue of passive cooling?| A．It is simple to design. | B．It uses no chemicals. |
| C．It is smart. | D．It uses no power. |
| A．It was hard to design. |
| B．Its material was hard to produce. |
| C．Its heat loss and cooling are imbalanced. |
| D．It wasn't tested on a model concrete building. |
| A．Metal. | B．System. | C．Platform. | D．Building. |
| A．The principle of air-conditioning. |
| B．The differences between active and passive cooling. |
| C．A new coating to keep buildings cool without electricity. |
| D．A new building to maintain its inside temperature without electricity. |
3 . Elizabeth Spelke, a cognitive (认知的) psychologist at Harvard, has spent her career testing the world's most complex learning system-the mind of a baby. Babies might seem like no match for artificial intelligence (AI). They are terrible at labeling images, hopeless at mining text, and awful at video games. Then again, babies can do things beyond the reach of any AI. By just a few months old, they’ve begun to grasp the foundations of language, such as grammar. They’ve started to understand how to adapt to unfamiliar situations.
Yet even experts like Spelke don’t understand precisely how babies — or adults, for that matter — learn. That gap points to a puzzle at the heart of modern artificial intelligence: We're not sure what to aim for.
Consider one of the most impressive examples of AI, Alpha Zero, a programme that plays board games with superhuman skill. After playing thousands of games against itself at a super speed, and learning from winning positions, Alpha Zero independently discovered several famous chess strategies and even invented new ones. It certainly seems like a machine eclipsing human cognitive abilities. But Alpha Zero needs to play millions more games than a person during practice to learn a game. Most importantly, it cannot take what it has learned from the game and apply it to another area.
To some AI experts, that calls for a new approach. In a November research paper, Francois Chollet, a well-known AI engineer, argued that it’s misguided to measure machine intelligence just according to its skills at specific tasks. “Humans don’t start out with skills; they start out with a broad ability to acquire new skills,” he says. “What a strong human chess player is demonstrating is not only the ability to play chess, but the potential to fulfill any task of a similar difficulty.” Chollet posed a set of problems, each of which requires an AI programme to arrange colored squares on a grid (格栅) based on just a few prior examples. It’s not hard for a person. But modern machine-learning programmes-trained on huge amounts of data — cannot learn from so few examples.
Josh Tenenbaum, a professor in MIT's Center for Brains, Minds & Machines, works closely with Spelke and uses insights from cognitive science as inspiration for his programmes. He says much of modern AI misses the bigger picture, comparing it to a cartoon about a two-dimensional world populated by simple geometrical (几何形的) people. AI programmes will need to learn in new ways — for example, by drawing causal inferences rather than simply finding patterns. “At some point — you know, if you’re intelligent — you realize maybe there's something else out there,” he says.
1. Compared to an advanced AI programme, a baby might be better at _______________.| A．labeling images | B．identifying locations |
| C．playing games | D．making adjustments |
| A．Stimulating. | B．Measuring. | C．Beating. | D．Limiting. |
| A．AI is good at finding similar patterns |
| B．AI should gain abilities with less training |
| C．AI lacks the ability of generalizing a skill |
| D．AI will match humans in cognitive ability |
| A．What is exactly intelligence? |
| B．Why is modern AI advanced? |
| C．Where is human intelligence going? |
| D．How do humans tackle the challenge of AI? |
4 . The concept of ownership comes so easily to humans that even preschoolers have got it. Robots, on the other hand, often struggle to grasp such abstract concepts. Now a well-mannered robot that can make it has been programmed.
“Teaching robots ownership-related etiquette (礼仪) is really, really worthwhile,” says Matthias Scheutz, a computer scientist at Tufts University. "We can't just send out robots who are unaware of who owns what... If I instruct a robot to ‘build a fence’, and it goes to the neighbor’s and starts ‘stealing’ boards, that's not what we have in mind.”
The new socially conscious robot can learn who owns what from clear statements as well as its own observations. The robot learns its code of conduct (行为准则) from direct orders and generalizing from specific examples. For instance, if the robot is told not to touch several objects that it knows belong to specific people, the robot will deduce that, as a general rule, it shouldn’t touch owned objects.
Artificial intelligence (AI) expert Xuan Tan and colleagues at Yale found out how the robot reacts in experiments with blocks on a table. In one session, Tan played with only the red blocks, leading the robot to infer that these blocks belonged to the same person. When Tan instructed the robot to throw away everything on the table and the machine reached for a red block, Tan stopped the robot, saying, “That's mine.” Now aware that it should not throw Tan’s belongings, and assuming that the rest of the red blocks belonged to Tan as well, the robot cleared the table of everything but red blocks.
Later, when Tan's colleague Jake Brawer directed the robot to throw out a red block, the robot replied, "Sorry, I'm forbidden to throw it away if it's owned by Tan.” Though robots may have more difficulty understanding who owns what in situations filled with far more objects of much wider variety than blocks on a table. Scheutz called it a good "first attempt” at equipping robots with an appreciation of ownership.
1. What does the second paragraph focus on?| A．The way of teaching robots ownership. | B．The basics of the human-robot relationship. |
| C．The benefit of robots learning ownership. | D．The importance of robots learning code of conduct. |
| A．Conclude. | B．Admit. | C．Agree. | D．Doubt. |
| A．To train the robot. | B．To predict the robot’s move. |
| C．To test the robot's behavior. | D．To study the preference. |
| A．The robot knows how to obey. | B．The robot can learn who owns what. |
| C．The robot follows no wrong orders. | D．The robot can solve complex situations. |
5 . Hardware in general, and smartphones in particular, have become a huge environmental and health problem in the Global South' s landfill sites(垃圾填埋场).
Electronic waste(e-waste) currently takes up 5 percent of all global waste, and it is set to increase rapidly as more of us own more than one smartphone, laptop and power bank. They end up in places like Agbogbloshie on the outskirts of Ghana's capital, Accra.It is the biggest e-waste dump in the world, where 10,000 informal workers walk through tons of abandoned goods as part of an informal recycling process.They risk their health searching for the precious metals that are found in abandoned smartphones.
But Agbogbloshie should not exist. The Basel Convention, a 1989 treaty aims to prevent developed nations from unauthorized dumping of e-waste in less developed countries. The E-waste industry, however, circumvents the regulations by exporting e-waste labelled as “secondhand goods” to poor countries like Ghana, knowing full well that it is heading for a landfill site.
A recent report found Agbogbloshie contained some of the most dangerous chemicals.This is not surprising: smartphones contain chemicals like mercury(水银), lead and even arsenic (砷 ) Reportedly, one egg from a free-range chicken in Agbogbloshie contained a certain chemical which can cause cancer and damage the immune system at a level that's about 220 times greater than a limit set by the European Food Safety Authority(EFSA), Most worryingly, these poisonous chemicals are free to pollute the broader soil and water system. This should concern us all, since some of Ghana's top exports are cocoa and nuts.
Some governments have started to take responsibility for their consumers' waste.For example, Germany has started a project that includes a sustainable recycling system at Agbogbloshie, along with a health clinic for workers.However, governments cannot solve the problem alone, as there is am almost limitless consumer demand for hardware, especially when governments’ green policies are focused on issues like climate change.
Only the manufacturers can fix this.A more economically sustainable and politically possible solution is through encouraging hardware manufacturers to make the repair, reuse and recycling of hardware profitable, or at least cost-neutral.
1. What can we infer from paragraph2?| A．Electronic products need improving urgently. |
| B．Electronic waste is too complex to get fully recycled. |
| C．Electronic waste requires more landfill sites across Ghana. |
| D．Electronic pollution is a burning question in Agbogbloshie. |
| A．Tightens |
| B．Abolishes |
| C．Avoids |
| D．Follows |
| A．The violation of EFSA’s standard |
| B．The lack of diversity in Ghana s exports. |
| C．The damage to chickens immune system |
| D．The threat of polluted food around the world |
| A．Manufacturers' developing a sustainable hardware economy. |
| B．Governments' adjusting their green policies about e-waste. |
| C．Reducing customers' demands for electronic products. |
| D．Letting governments take on the main responsibility. |
6 . Time and how we experience it have always puzzled us. Physicists have created fascinating theories, but their time is measured by a pendulum (钟摆) and is not psychological time, which leaps with little regard to the clock or calendar. As someone who understood the distinction observed, ''When you sit with a nice girl for two hours it seems like a minute, but when you sit on a hot stove, a minute seems like two hours. ''
Psychologists have long noticed that larger units of time, such as months and years, fly on swifter wings as we age. They also note that the more time is structured with schedules and appointments, the more rapidly it seems to pass. For example, a day at the office flies compared with a day at the beach.
Expectation and familiarity also make time seem to flow more rapidly. Almost all of us have had the experience of driving somewhere we've never been before. Surrounded by unfamiliar scenery, with no real idea of when we’ll arrive, we experience the trip as lasing a long time. But the return trip, although exactly as long, seems to take far less time. The novelty of the outward journey has become routine.
When days become as identical as beads (小珠子)on a string, they mix together, and even months become a single day. To counter this, try to find ways to interrupt the structure of your day-- to stop time, so to speak.
Learning something new is one of the ways to slow the passage of time. One of the reasons the days of our youth seems to be full and long is that these are the days of learning and discovery. For many of us, learning ends when we leave school, but this doesn't have to be.
1. What is the underlined sentence in paragraph 1 used to show?| A．Psychological time is quite puzzling. |
| B．Time should not be measured by a pendulum. |
| C．Physical time is different from psychological time |
| D．Physical theory has nothing to do with the true sense of time |
| A．Our sense of time changes. |
| B．We spend less time at the beach |
| C．More time is structured and scheduled |
| D．Time is structured with too many appointments. |
| A．excitement | B．unfamiliarity | C．imagination | D．amusement |
| A．To give various explanations about time |
| B．To describe how we experience time physically |
| C．To show the differences of two kinds of time |
| D．To explain why time flies and how to slow it down |
7 . In order to help cope with the vast number of student questions in the online class, Knowledge-Based Artificial Intelligence, Professor Ashok Goel of Georgia Tech developed an artificially intelligent teaching assistant. This online course is a core requirement of Georgia Tech’s online Master of Science in Computer Science program. Professor Goel already had eight teaching assistants, but that wasn’t enough to handle the vast number of daily questions from students.
Many students drop out of online courses because of the lack of teaching support. When students feel isolated or confused and reach out with questions that go unanswered, their motivation to continue begins to fade. Professor Goel decided to do something to remedy this situation and his solution was to create a virtual assistant named Jill Watson, which is based on the IBM Watson platform.
Goel and his team developed several versions of Jill Watson before releasing her to the online forums. At first, the virtual assistant wasn’t too great. But Goel and his team sourced the online discussion forum to find all the 40,000 questions that had ever been asked since the class was launched. Then they began to feed Jill with the questions and answers. After some adjustment and ample time, Jill was able to answer the students’ questions correctly 97% of the time. The virtual assistant became so advanced and realistic that the students didn’t know she was a computer. The students, who were studying artificial intelligence, were interacting with the virtual assistant and couldn’t tell it from a real human being. Goel didn’t inform them about Jill’s true identity until April 26. The students were actually very positive about the experience.
The goal of Professor Goel’s virtual assistant next year is to take over answering 40% of all the questions posed by students on the online forum. The name Jill Watson will, of course, change to something else next semester. Professor Goel has a much rosier forecast on the future of artificial intelligence than, say, Elon Musk, Stephen Hawking, Bill Gates or Steve Wozniak.
1. What do we learn about Knowledge-Based Artificial Intelligence?| A．It is a robot that can answer students’ questions. |
| B．It is a high-tech device that revolutionizes teaching. |
| C．It is a course designed for students to learn online. |
| D．It is a computer program that aids student learning. |
| A．Boycott. | B．Improve. | C．Evaluate. | D．Corrupt. |
| A．She was unwelcome to students at first. |
| B．She got along pretty well with students. |
| C．She turned out to be a great success. |
| D．She was released online as an experiment. |
| A．Assign her to answer more of students’ questions. |
| B．Upgrade her intelligence to the level of top scientists. |
| C．Launch different versions of her online. |
| D．Encourage students to interact with her more freely. |
8 . I don't realize that I've been at college for nearly one and half year until now. Looking back into the last year, what shall I say? It consisted of both happiness and sadness. Life always goes like this, up and down, as is so exciting. Now when I recall the past, no matter how I felt at that time, they are all treasures for me.
That was the moon festival last year, which was also the first time we went out after we entered the college. It was said that the sea in Dalian was well-known and was also a wonderful place to watch the moon. After getting all the food and drinking ready, we four girls set off for the seaside. There were many people and we picked up a less crowded beach. At first, we enjoyed ourselves by drinking and eating. When the moon turned brighter, we played with the seawater. As a result, we were all drenched with water. Bathing in the moonlight, we ran and laughed. We seemed to land on another world, where was full of fresh air, laughter and love. The laughter is still echoing on my mind so far.
Life doesn't stay the same, occasionally having a particular taste. That is sadness. What impressed me deeply is a failure in a singing competition. It was the first time I had given a performance on such a large stage in front of so many people. I was so nervous that the whole song was performed out of tune. As you could imagine, I was greeted with boos from the audience. I still remembered how dismal I felt that moment and I sat alone crying at the seaside. After that, I talked to mother about it. She told me that it was not a failure; at least, I was brave enough to show myself publicly.
Everything has passed. I’ve stored them at the bottom of my heart. I am in the second grade already. Yet much needs me to challenge. On the way, there's both happiness and distress. However, I will go ahead just all the same.
1. The underlined word ''drenched'' in the second paragraph has a similar meaning with _______.| A．dried | B．wet |
| C．frozen | D．washed away |
| A．full of happiness | B．filled with sadness |
| C．made up of laughter and tears | D．not worth living |
| A．It was wonderful | B．It was disappointing |
| C．The passage doesn’t say | D．It was perfect |
| A．A friend in need is a friend indeed. |
| B．Do wrong once and you’ll never hear the end of it. |
| C．Where there is a will, there is a way. |
| D．Time and tide wait for no man. |
9 . Animals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the world forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.
Why should people care? Because we need animals. And because once they are gone, there will never be any more.
Animals are more than just beautiful and interesting. They are more than just a source of food. Every animal has its place in the balance of nature. Destroying one kind of animal can create many problems.
For example, when farmers killed large numbers of hawks(老鹰), the farmers stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied quickly.
Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger.
Quite a few countries have passed laws. These laws forbid(禁止)the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing.
1. What is the best title for the passage?| A．Save the Animals | B．Useful Animals |
| C．Laws for Animals | D．Animals in Danger |
| A．they give us a source of food | B．they are beautiful and lovely |
| C．they give us a lot of pleasure | D．they keep the balance of nature |
| A．Became more | B．Became less |
| C．Turned black | D．Ate food |
| A．people have known the importance of animal protection a long time ago |
| B．the number of hawks is on the decrease |
| C．animals play an important role in people’s life |
| D．many countries passed laws forbidding the killing of any animal |
10 . We’ve known for years that plants can see, hear, smell and communicate with chemicals. Now, reported New Scientist, they have been recorded making sounds when stressed.
In a yet-to-be-published study, Itzhak Khait and his team at Tel Aviv University, in Israel, found that tomato and tobacco plants can make ultrasonic(超声的)noises. The plants “cry out” due to lack of water, or when their stems(茎)are cut. It’s just too high-pitched(音调高的)for humans to hear.
Microphones placed 10 centimeters away from the plants picked up sounds in the ultrasonic range of 20 to 100 kilohertz(千赫兹). Human hearing usually ranges from 20 hertz to 20 kilohertz. “These findings can alter the way we think about the plant kingdom,” they wrote.
On average, “thirsty” tomato plants made 35 sounds an hour, while tobacco plants made 11. When plant stems were cut, tomato plants made an average of 25 sounds in the following hour, and tobacco plants 15. Unstressed plants produced fewer than one sound per hour, on average.
Perhaps most interestingly, different types of stress led to different sounds. The researchers trained a machine-learning model to separate the plants’ sounds from those of the wind, rain and other noises of the greenhouse. In most cases, it correctly identified whether the stress was caused by dryness or a cut, based on a sound’s intensity and frequency. Water-hungry tobacco appears to make louder sounds than cut tobacco, for example. Although Khait and his colleagues only looked at tomato and tobacco plants, they think other plants also make sounds when stressed.
If farmers could hear these sounds, said the team, they could give water to the plants that need it most. As climate change causes more droughts, they said this would be important information for farmers. “The sounds that drought-stressed plants make could be used in precision agriculture(精准农业),” said Anne Visscher at the Royal Botanic Gardens, Kew, in the UK.
Khait’s report also suggest that insets and mammals can hear the sounds up to 5 meters away and respond. For example, a moth(蛾子)may decide not to lay eggs on a water-stressed plant. Edward Farmer, at the University of Lausanne, Switzerland, is doubtful. He said that the idea of moths listening to plants is “a little too speculative”.
If plants are screaming for fear of their survival, should we be thankful we can’t hear them?
1. What did Khait and his team find from their research?| A．Plants made low-pitched sounds when in danger. |
| B．Plants were able to produce sounds in response to stresses. |
| C．Plants picked up a wider range of sounds when stressed. |
| D．Plants made ultrasonic noises to communicate with each other. |
| A．A plant reacted to different stresses with the same sound. |
| B．Cut tomato plants produced more sounds per hour than water-hungry ones. |
| C．Cut tobacco plants seemed to make weaker sounds than drought-stressed ones. |
| D．Tobacco plants might make louder sounds than tomato plants when short of water. |
| A．The potential applications of the research. |
| B．Challenges facing farmers in the future. |
| C．Farmers ‘contributions to the research. |
| D．What the future agriculture will be like. |
| A．practical | B．unsuspected | C．unsupported | D．complicated |
