1 . On March 7, 1907, the English statistician Francis Galton published a paper which illustrated what has come to be known as the “wisdom of crowds” effect. The experiment of estimation he conducted showed that in some cases, the average of a large number of independent estimates could be quite accurate.
This effect capitalizes on the fact that when people make errors, those errors aren’t always the same. Some people will tend to overestimate, and some to underestimate. When enough of these errors are averaged together, they cancel each other out, resulting in a more accurate estimate. If people are similar and tend to make the same errors, then their errors won’t cancel each other out. In more technical terms, the wisdom of crowds requires that people’s estimates be independent. If for whatever reasons, people’s errors become correlated or dependent, the accuracy of the estimate will go down.
But a new study led by Joaquin Navajas offered an interesting twist (转折) on this classic phenomenon. The key finding of the study was that when crowds were further divided into smaller groups that were allowed to have a discussion, the averages from these groups were more accurate than those from an equal number of independent individuals. For instance, the average obtained from the estimates of four discussion groups of five was significantly more accurate than the average obtained from 20 independent individuals.
In a follow-up study with 100 university students, the researchers tried to get a better sense of what the group members actually did in their discussion. Did they tend to go with those most confident about their estimates? Did they follow those least willing to change their minds? This happened some of the time, but it wasn’t the dominant response. Most frequently, the groups reported that they “shared arguments and reasoned together”. Somehow, these arguments and reasoning resulted in a global reduction in error. Although the studies led by Navajas have limitations and many questions remain, the potential implications for group discussion and decision-making are enormous.
1. What is paragraph 2 of the text mainly about?| A．The methods of estimation. | B．The underlying logic of the effect. |
| C．The causes of people’s errors. | D．The design of Galton’s experiment. |
| A．the crowds were relatively small | B．there were occasional underestimates |
| C．individuals did not communicate | D．estimates were not fully independent |
| A．The size of the groups. | B．The dominant members. |
| C．The discussion process. | D．The individual estimates. |
| A．Unclear. | B．Dismissive. | C．Doubtful. | D．Approving. |
2 . As cities balloon with growth, access to nature for people living in urban areas is becoming harder to find. If you’re lucky, there might be a pocket park near where you live, but it’s unusual to find places in a city that are relatively wild.
Past research has found health and wellness benefits of nature for humans, but a new study shows that wildness in urban areas is extremely important for human well-being.
The research team focused on a large urban park. They surveyed several hundred park-goers, asking them to submit a written summary online of a meaningful interaction they had with nature in the park. The researchers then examined these submissions, coding (编码) experiences into different categories. For example, one participant’s experience of “We sat and listened to the waves at the beach for a while” was assigned the categories “sitting at beach” and “listening to waves.”
Across the 320 submissions, a pattern of categories the researchers call a “nature language” began to emerge. After the coding of all submissions, half a dozen categories were noted most often as important to visitors. These include encountering wildlife, walking along the edge of water, and following an established trail.
Naming each nature experience creates a usable language, which helps people recognize and take part in the activities that are most satisfying and meaningful to them. For example, the experience of walking along the edge of water might be satisfying for a young professional on a weekend hike in the park. Back downtown during a workday, they can enjoy a more domestic form of this interaction by walking along a fountain on their lunch break.
“We’re trying to generate a language that helps bring the human-nature interactions back into our daily lives. And for that to happen, we also need to protect nature so that we can interact with it,” said Peter Kahn, a senior author of the study.
1. What phenomenon does the author describe at the beginning of the text?| A．Pocket parks are now popular. | B．Wild nature is hard to find in cities. |
| C．Many cities are overpopulated. | D．People enjoy living close to nature. |
| A．To compare different types of park-goers. | B．To explain why the park attracts tourists. |
| C．To analyze the main features of the park. | D．To find patterns in the visitors’ summaries. |
| A．Walking is the best way to gain access to nature. |
| B．Young people are too busy to interact with nature. |
| C．The same nature experience takes different forms. |
| D．The nature language enhances work performance. |
| A．Language study. | B．Environmental conservation. |
| C．Public education. | D．Intercultural communication. |
3 . Over the last seven years, most states have banned texting by drivers, and public service campaigns have tried a wide range of methods to persuade people to put down their phones when they are behind the wheel.
Yet the problem, by just about any measure, appears to be getting worse. Americans are still texting while driving, as well as using social networks and taking photos. Road accidents, which had fallen for years, are now rising sharply.
That is partly because people are driving more, but Mark Rosekind, the chief of the National Highway Traffic Safety Administration, said distracted（分心）driving was "only increasing, unfortunately."
"Big change requires big ideas." he said in a speech last month, referring broadly to the need to improve road safety. So to try to change a distinctly modern behavior, lawmakers and public health experts are reaching back to an old approach: They want to treat distracted driving like drunk driving.
An idea from lawmakers in New York is to give police officers a new device called the Textalyzer. It would work like this: An officer arriving at the scene of a crash could ask for the phones of the drivers and use the Textalyzer to check in the operating system for recent activity. The technology could determine whether a driver had just texted, emailed or done anything else that is not allowed under New York's hands-free driving laws.
"We need something on the books that can change people's behavior,” said Félix W. Ortiz, who pushed for the state's 2001 ban on hand-held devices by drivers. If the Textalyzer bill becomes law, he said, "people are going to be more afraid to put their hands on the cell phone."
1. Which of the following best describes the ban on drivers' texting in the US?| A．Ineffective. | B．Unnecessary. |
| C．Inconsistent. | D．Unfair. |
| A．Where a driver came from. | B．Whether a driver used their phone. |
| C．How fast a driver was going. | D．When a driver arrived at the scene. |
| A．Advice. | B．Data. | C．Tests. | D．Laws. |
| A．To Drive or Not to Drive? Think Before You Start |
| B．Texting and Driving? Watch Out for the Textalyzer |
| C．New York Banning Hand-Held Devices by Drivers. |
| D．The Next Generation Cell Phone: The Textalyzer- |
The shelves in most supermarkets are full of family-size this and multi-buy that. However, if you’re shopping for one, buying extra
Of course, shops are not charities — they price goods in the way
Many supermarkets are no longer doing “buy one get one free” promotions because of the
If your supermarket sells loose produce, then buying smaller quantities is easier. Over the last two years, some supermarkets
Who knows, perhaps some of the more forward-looking
Last summer, Hilda worked as a volunteer with dolphin trainers at a sea life park. Her job was to make sure the tanks were free of any items so that the trainers could train the dolphins to fetch specific items. However, one day after cleaning, one of the dolphins, Maya, presented Hilda with a candy wrapper from the tank. When Katherine, the trainer, saw this, she blamed Hilda for her carelessness. Upset but not discouraged by this event, Hilda decided to do some spying on Maya.
The next morning, Hilda arrived at the park early. She put on her scuba gear (水下呼吸器) and jumped into the tank for her usual, underwater sweep. Finding nothing in the tank, she climbed out of the water just in time to see Katherine jumping in on the other side. After what happened yesterday, Hilda knew what she was doing. She watched as Katherine performed her underwater search, but Hilda wasn’t surprised when she surfaced empty-handed.
During the tank sweeps, Maya had been swimming playfully, but now the dolphin stopped suddenly and swam to the back part of the tank where the filter (过滤) box was located. She stuck her nose down behind the box and then swam away. What was Maya doing back there? Hilda wondered. She jumped back into the water and swam over to take a look behind the box, and her question was answered. Hilda then swam across the tank following Maya’s path and emerged from the water to find Katherine removing her scuba gear. As Katherine turned around, her mouth dropped open. There was Maya at the edge of the tank with a comb (梳子) in her mouth waiting for her treat.
“Maya! Where did you get that?” demanded Katherine, taking the comb and throwing her a fish. “I know where she got it,” declared Hilda climbing out of the tank with a handful of items still wet from their watery, resting place. “What’s all this?” Katherine asked, obviously confused.
注意：(1)续写词数应为150个左右;
(2)请按如下格式在答题卡的相应位置作答。
“This is Maya’s secret,” Hilda said with a big smile.
__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Now Katherine realized what had been going on.
__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________6 . Thanks to in-depth reporting by the Wall Street Journal, we now know that Facebook has long been aware its product Instagram has harmful effects on the mental health of many adolescent users. Young girls, in particular, struggle with their body image thanks to a constant stream of photos and videos showing beautiful bodies that users don’t think they can attain.
While the information the Journal covered is essential and instructive, it does not tell the whole story. Deep down, this is not an Instagram problem; it’s a people problem. Understanding that distinction can make the difference between a failed attempt to contain a teen’s interest in an addictive app and successfully addressing the underlying problem leading to mental distress induced (诱发) by Instagram.
Critics were quick to shame Facebook for sitting on the data and not releasing it to researchers or academics who asked for it. Others criticize the social media giant for not using the research to create a safer experience for its teen users. The anger, while understandable, is misplaced.
While I’m reluctant to defend Facebook, I’m not sure it’s reasonable to blame the company for withholding data that would hurt its business. Have you ever binge-watched (狂看) a Netflix series? I assure you it wasn’t a healthy endeavor. You were in active, likely did nothing productive, mindlessly snacked and didn’t go outside for fresh air. It is an objectively harmful use of time to stare at a TV or laptop for a full weekend. Should we respond by shaming Netflix for not alerting us to how damaging an addictive product can be?
While it’s reasonable to say Instagram makes esteem issues worse, it strains credulity (夸张到难以置信) to believe it causes them in the first place. You create your own experiences on social media. For the most part, you choose which accounts to follow and engage. If you’re already vulnerable to insecurities and self-sabotage (自损) — as many teens are — you will find accounts to obsess over. And this isn’t a new phenomenon.
Before social media, there were similar issues fueling self-esteem issues. Whether the target be magazines, movies or television shows depicting difficult-to-attain bodies, there has been a relatively steady chorus (异口同声) of experts nothing the damage new media could cause young viewers.
Self-esteem issues have an underlying cause — one that’s independent of social media use. Instagram merely enhances those feelings because it provides infinitely more access to triggers than older forms of media. It’s more worthwhile to address those underlying factors rather than to attack Facebook.
1. The author thinks the criticisms against Instagram __________.| A．are successful attempts to change teens’ interest in addictive apps |
| B．address the Instagram - induced mental pain |
| C．are only based on the data released by Facebook |
| D．are not directed at the fundamental problem |
| A．compare the criticisms against it and Facebook |
| B．defend why Facebook is to blame |
| C．suggest the critics’ remarks are not to point |
| D．show Netflix does more harm to teens |
| A．it is human nature to get addicted to social media |
| B．users decide on their experiences on social media |
| C．people have a tendency to feel insecure online |
| D．people are keen on fabricating their self - profile |
| A．the unprecedented criticism facing Facebook |
| B．the alarming online habits of teenagers worldwide |
| C．the root cause of Instagram - induced mental strains |
| D．the harmful impact of Instagram on teenagers |
Melati and Isabel deeply love their home on the island, surrounded by tropical rain forests, green fields, and a vast ocean. Enjoying a swim at their local beach was once a daily pleasure for them. But when Melati was fifteen, and Isabel just ten, the sisters started to lose their enthusiasm for swimming in the waters near their borne. More often than not, plastic bags would be around them as they swam and some were scattered on the beach. They got really upset about that.
Melati didn’t think much about it until one day her teacher gave a lesson on some world heroes. Each of those people had sparked movements of positive changes in the world. They believed in the impact they could have and they did inspire more people to do something meaningful. After school, Melati walked home slowly in silence, concerned about the vast amount of plastic rubbish on the beach. The heroes crossed her mind. If they could do it, we could do it too, she thought. The idea lit her up. She couldn’t wait to share what she thought with Isabel and quickened her pace.
“So many plastic bags around! The beach is dirty and messy! It’s so terrible! We have lost the clean and beautiful beach. Can’t we do something to get it back?” Melati said heartily. Isabel felt a bit puzzled at what to do, but she also had a strong desire to do something. Picturing a beach as fascinating as before in mind, the pair jumped with joy.
They talked a lot, anxious to know how Dad and Mom would respond to their ideas. That night when the family sat by the dinner table, the sisters eagerly got their ideas across. While Mom and Dad listened to the girls carefully, their eyes shone. “How amazing that would be! We are so proud of you!” Dad exclaimed. Mom came up, gave them a thumb up and hugged the sisters.
注意：1．续写词数应为150左右；
2．请按如下格式在答题卡的相应位置作答。
Melati and Isabel decided to make a positive impact straight away.
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________One month later, Melati received a call from the local newspaper.
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________8 . That dinosaurs ate the mammals (哺乳动物) that ran beneath their feet is not in doubt. Now an extraordinary fossil newly described in Scientific Reports, unearthed by a team led by Gang Han at Hainan Vocational University of Science and Technology in China, shows that sometimes the tables were turned.
The fossil -dated to about 125 million years ago, during the Cretaceous period-was formed when a flow of boiling volcanic mud swallowed two animals seemingly locked in a life-and-death fight. The one on top is a mammal. This animal is a herbivorous species closely related to the Triceratops (三角恐龙). Animal interactions such as this are exceptionally cam e in the fossil record.
One possibility is that the mammal was eating something already dead, other than hunting live prey. These days it is uncommon for small mammals to attack much larger animals. But it is not unheard of. And Dr. Han and his colleagues point out that those mammals which eat dead bodies typically leave tooth marks all over the bones of the animals. The dinosaur’s remains show no such marks. There is also a chance the fossil could be a fake. More and more convincing fake s have emerged, as this one did -though Dr. Han and his colleagues argue that the complexly connected nature of the skeletons (骨骼) makes that unlikely, too.
Assuming it is genuine, the discovery serves as a reminder that not all dinosaurs were enormous during the Cretaceous and not all mammals were tiny. From nose to tail, the dinosaur is just 1.2 meters long. The mammal is a bit under half a meter in length. Despite being half the size, the mammal has one paw firmly wrapped around one of its prey’s limbs, and another pulling on its jaw. It is biting down on the dinosaur’s chest, and has ripped off two of its ribs. Before they were interrupted, it seems that the mammal was winning.
1. Which idiom is closest in meaning to underlined part “the tables were turned” in paragraph 1?| A．The fittest survives. | B．The hunters become hunted. |
| C．Fortune always favors the brave. | D．The truth will always come to light. |
| A．To prove the fossil was fake. | B．To show the forming of the fossil. |
| C．To illustrate the process of hunting. | D．To suggest the dinosaur was hunted alive. |
| A．The size of the fossil. | B．The absence of fake fossils. |
| C．The complexity of the skeletons. | D．The consistency of the opinions. |
| A．It offers a cause. | B．It highlights a solution. |
| C．It justifies the conclusion. | D．It provides a new discovery. |
A skywell, or “tian jing” in Chinese, is a typical feature of a traditional home in Southern and Eastern China. They are commonly seen in homes
Since decades ago, the government
The fact that skywells still exist today shows
10 . Any schoolchild knows that a whale breathes through its blowhole. Fewer know that a blowhole is a nostril (鼻孔) slightly changed by evolution into a form more useful for a mammal that spends its life at sea. And only a dedicated expert would know that while toothed whales, such as sperm whales, have one hole, baleen (鲸须) whales, such as humpback and Rice whales, have two.
Even among the baleen whales, the placing of those nostrils differs. In some species they are close together. In others, they are much further apart. In a paper published in Biology Letters Conor Ryan, a marine biologist at the Scottish Association for Marine Science, suggests why that might be. Having two nostrils, he argues, helps whales smell in stereo (立体空间).
Many types of baleen whales eat tiny animals known as zooplankton (浮游动物), which they catch by filtering (过滤) them from seawater using the sheets of fibrous baleen that have replaced teeth in their mouths. But to eat something you first have to find it. Toothed whales do not hunt by scent. In fact, the olfactory bulb—the part of the brain that processes smell—is absent in such creatures. But baleen whales still have olfactory bulbs, which suggests smell remains important. And scent can indeed give zooplankton away. Zooplankton like to eat other tiny creatures called phytoplankton (浮游植物). When these are under attack, they release a special gas called dimethyl sulphide, which in turn attracts baleen whales.
Most animals have stereoscopic senses. Having two eyes, for instance, allows an animal to compare the images from each in order to perceive depth. Having two ears lets them locate the direction from which a sound is coming. Dr Ryan theorized that paired blowholes might bring baleen whales the same sorts of benefits.
The farther apart the sensory organs are, the more information can be extracted by the animal that bears them. The researchers used drones to photograph the nostrils of 143 whales belonging to 14 different species. Sure enough, baleen whales that often eat zooplankton, such as the North Atlantic right whale, have nostrils that are farther apart than do those, such as humpback whales, that eat zooplankton occasionally. Besides allowing them to breathe, it seems that some whales use their blowholes to determine in which direction dinner lies.
1. What do we know about whales’ nostrils according to the first two paragraphs?| A．They are adapted ones. | B．They are developed merely for smell. |
| C．They are not easy to detect. | D．They are fixed universally in numbers. |
| A．The teeth that baleen whales have. |
| B．The smell that phytoplankton send. |
| C．The sound waves that zooplankton create. |
| D．The chemical signals that zooplankton give off. |
| A．By quoting a theory. | B．By using examples. |
| C．By making contrast. | D．By making inferences. |
| A．The sense of smell. | B．The possibility to attract food. |
| C．The ability to locate food. | D．The ability to communicate. |
