1 . “ Humans and machine algorithms (算法) have complementary (互补的) strengths and weaknesses. Each uses different sources of information and strategies to make predictions and decisions, ” said Mark Steyvers, UCI professor of cognitive sciences. “ We show through experiments that humans can improve the predictions of AI even when human accuracy is below that of the AI, and vice versa (反之亦然). This accuracy is higher than combining predictions from two individuals or two AI algorithms. ”
To test the framework, researchers conducted an image classification experiment where human participants and computer algorithms worked separately to correctly identify disorderly pictures of animals and everyday items including chairs, bottles, bicycles and trucks. The human participants ranked their confidence in the accuracy of each image identification as low, medium or high, while the machine classifier generated a continuous score. The results showed large differences in confidence between humans and AI algorithms across images.
“ Human participants were confident that a particular picture contained a chair, for example, while the AI algorithm was confused about the image, ” said Padhraic Smyth, UCI Chancellor’s Professor of computer science. “ Similarly, the AI algorithm was able to confidently provide a label for the object shown, while human participants were unsure if the disorderly picture contained any recognizable object. ”
When predictions and confidence scores from both were combined using the researchers’ new Bayesian framework, the mixed model led to better performance than either human or machine predictions achieved alone.
“ While the past research has demonstrated the benefits of combining machine predictions or combining human predictions, this work shows a new direction in demonstrating the potential of combining human and machine predictions, pointing to new and improved approaches to human-AI cooperation, ” Smyth said.
“ The blend of cognitive science focusing on understanding how humans think and behave and computer science in which technologies are produced will provide further insight into how humans and machines can cooperate to build more accurate artificially intelligent systems, ” the researchers said.
1. Which of the following may the research’s findings agree with?| A．Humans have poor performance in making predictions. |
| B．Humans and machine algorithms should work together. |
| C．Machine algorithms have low accuracy in calculation. |
| D．Machine algorithms failed in the classification experiment. |
| A．Comparison. | B．Assumption. | C．Giving examples. | D．Analysing reasons. |
| A．Difference. | B．Combination. | C．Contradiction. | D．Advantage. |
| A．Humans are confident of their predictions |
| B．Humans can improve the predictions of AI |
| C．Develop mixed human- machine model for smarter AI |
| D．Identify the strengths of humans and machine algorithms |
2 . My best friend traveled to stay with our family last weekend. When she arrived, she went straight to the kitchen and, without asking, ate a spoonful of raspberry jam and some dried fruit. She wasn’t being rude. I knew she would do this. We’ve known each other for almost 20 years. She can eat anything she wants from my kitchen. Indeed, I bought her favorite fruits and snacks at the shop that morning.
Our long weekend together was luxuriously (惬意地) simple. I was recovering from surgery (手术) and couldn’t go to shopping malls. We passed the time running errands (做杂事), going to the post office and collecting dry cleaning. We drank way too many cappuccinos. But we talked about every little detail of our lives.
There’s never been a quiet moment in our friendship. We’ve lived in different cities for almost a decade. Reunions demand constant conversation. our personalities are matched, to be sure, and a shared history is indescribably valuable. We were competitors in high school before bonding over a bad experience. Then we discovered the many interests that we had in common. Our friendship cemented (巩固) itself quickly. We stayed companions through law school, through our first jobs and our first boyfriends. We supported each other through break-ups and breakthroughs. Ours is a friendship for the ages.
There is something special about friends who know everyone and everything about you. They are rare. These are the people you’ve chosen to witness your life. They have seen the bright lights of achievement, the depths of despair (绝望) and the boring routine (平淡乏味) of the in-between.
It’s special to unpack feelings and frustrations without wasting time filling in the blanks. As my long weekend shows, with such friends we don’t have to “do”, we simply have to “be”. We drop the act, the performance, the public version of ourselves.
The special friendships are those which never fail to delight, the continuation of which is worth the extra effort, despite distance and difference sneaking (溜进) into your separate lives. I had the very great joy of this reminder last weekend. I’m lucky to have found this friend, to see a future where her companionship remains. Being together is perfection.
1. What happened during her best friend’s visit?| A．They enjoyed an eventful long weekend. | B．They bonded by having long conversations. |
| C．They made their favorite snacks and coffee. | D．They talked about recent news events. |
| A．they help each other deal with the boredom of life |
| B．they prefer to witness each other’s lives from far away |
| C．they try to show each other their best selves |
| D．they are comfortable being themselves when together |
| A．Charm comes from differences. | B．Politeness brings best friends closer. |
| C．Good friendships last naturally. | D．Good friendships need devotion. |
| A．describe what her best friend is like | B．tell about the friendship she treasures |
| C．explore the key aspects of friendship | D．express thanks to her best friend |
3 . Should schools report a student’s health to parents?
As if grades weren’t enough to worry about, some students now have weight on their minds too. The number of overweight children in the United States has more than doubled in the past 20 years, according to the U.S. Centers for Disease Control and Prevention.
As a result, schools in several states, from California to Pennsylvania, have started sending home "BMI report cards". Those schools send home a report of a student’s body mass index (BMI). BMI is a calculation of weight and height that tells whether a person is overweight for his or her age.
Some lawmakers say BMI reports warn parents of their children s health problem help fight against obesity. In 2003, former Arkansas Governor. Mike Huckabee helped launch the first program to report students’ BMI.
| A．Should schools send home BMI reports? |
| B．Obesity rates in that state have since stopped increasing. |
| C．Since then children with heart disease have received the reports. |
| D．Not everyone thinks that reporting students’ BMI is a good idea. |
| E．Schools agree that more activities are required for students to control weight. |
| F．Being obese, or severely overweight, can lead to health problems later in life. |
| G．Some people argue that schools that label students overweight are acting unfairly. |
4 . If you really want to go green, here’s good news: eating green foods is good for you. The very foods with a high carbon dioxide cost — dairy products, processed snacks — also tend to be filled with fat and calories. A green diet would be mostly vegetables and fruits, wholegrains, fish and lean meats like chicken — a diet that’s eco- and waistline-friendly. Eating green foods can be healthier and beneficial to the climate.
It may be hard to believe that a meal at McDonalds produces more carbon dioxide than that your trip to a faraway place produces. More than 37% of the world’s land is used for agriculture, much of which was once forested. Deforestation (砍伐森林) is a major source of carbon dioxide. The fertilizer (肥料) and machinery needed on a modern farm also have a large carbon footprint, as does the network of ships and trucks that brings the food from the farm to your plate.
The most efficient way to reduce the carbon footprint of your menu is to eat less meat, especially beef. Raising cattle takes a lot more energy than growing the equivalent (相等的) amount of grains, fruits or vegetables. What’s more, the majority of cattle in the U.S. are fed on grains and the fertilizer used to grow grains creates separate environmental problems.
Focus on eating food lower on the food chain, with more plants and fruits and less meat and fewer dairy products. It’s simple. We can change today what goes into our bodies for the health of our planet and ourselves.
1. According to the passage, eating green foods will ______.| A．protect the animals from being killed |
| B．promote the development of agriculture |
| C．help us lose weight and keep self-confidence |
| D．be good for our health and make a change of the climate |
| A．Deforestation. | B．Grains. |
| C．Machinery. | D．Fertilizer. |
| A．eat more vegetables than meat |
| B．stop raising cattle |
| C．plant more grains |
| D．use less fertilizer |
| A．The benefits of eating green foods. |
| B．How to reduce carbon dioxide. |
| C．The change of our menu. |
| D．The ways of keeping healthy. |
5 . We may think we're a culture that gets rid of our worn technology at the first sight of something shiny and new, but a new study shows that we keep using our old devices(装置) well after they go out of style. That’s bad news for the environment — and our wallets — as these outdated devices consume much more energy than the newer ones that do the same things.
To figure out how much power these devices are using, Callie Babbitt and her colleagues at the Rochester Institute of Technology in New York tracked the environmental costs for each product throughout its life — from when its minerals are mined to when we stop using the device. This method provided a readout for how home energy use has evolved since the early 1990s. Devices were grouped by generation — Desktop computers, basic mobile phones, and box-set TVs defined 1992. Digital cameras arrived on the scene in 1997. And MP3 players, smart phones, and LCD TVs entered homes in 2002, before tablets and e-readers showed up in 2007.
As we accumulated more devices, however, we didn't throw out our old ones. "The living-room television is replaced and gets planted in the kids' room, and suddenly one day, you have a TV in every room of the house," said one researcher. The average number of electronic devices rose from four per household in 1992 to 13 in 2007. We're not just keeping these old devices — we continue to use them. According to the analysis of Babbitt's team, old desktop monitors and box TVs with cathode ray tubes are the worst devices with their energy consumption and contribution to greenhouse gas emissions（排放）more than doubling during the 1992 to 2007 window.
So what's the solution（解决方案）? The team's data only went up to 2007, but the researchers also explored what would happen if consumers replaced old products with new electronics that serve more than one function, such as a tablet for word processing and TV viewing. They found that more on-demand entertainment viewing on tablets instead of TVs and desktop computers could cut energy consumption by 44%.
1. What does the author think of new devices?| A．They are environment-friendly. | B．They are no better than the old. |
| C．They cost more to use at home. | D．They go out of style quickly. |
| A．To reduce the cost of minerals. |
| B．To test the life cycle of a product. |
| C．To update consumers on new technology. |
| D．To find out electricity consumption of the devices. |
| A．The box-set TV. | B．The tablet. |
| C．The LCD TV. | D．The desktop computer. |
| A．Stop using them. | B．Take them apart. |
| C．Upgrade them. | D．Recycle them. |
6 . Facial expressions carry meaning that is determined by situations and relationships. For example, in American culture (文化) the smile is in general an expression of pleasure. Yet it also has other uses. A woman’s smile at a police officer does not carry the same meaning as the smile she gives to a young child. A smile may show love or politeness. It can also hide true feelings. It often causes confusion (困惑) across cultures. For example, many people in Russia consider smiling at strangers in public to be unusual and even improper. Yet many Americans smile freely at strangers in public places (although this is less common in big cities).Some Russians believe that Americans smile in the wrong places; some Americans believe that Russians don’t smile enough. In Southeast Asian cultures, a smile is frequently used to cover painful feelings. Vietnamese people may tell a sad story but end the story with a smile.
Our faces show emotions (情感), but we should not attempt to "read" people from another culture as we would "read" someone from our own culture. The fact that members of one culture do not express their emotions as openly as do members of another does not mean that they do not experience emotions.
Rather, there are cultural differences in the amount of facial expressions permitted. For example, in public and in formal situations many Japanese do not show their emotions as freely as Americans do. When with friends, Japanese and Americans seem to show their emotions similarly.
It is difficult to generalize about Americans and facial expressiveness because of personal and cultural differences in the United States. People from certain cultural backgrounds in the United States seem to be more facially expressive than others. The key is to try not to judge people whose ways of showing emotion are different. If we judge according to our own cultural habits, we may make the mistake of "reading" the other person incorrectly.
1. What does the smile usually mean in America?| A．Love. | B．Politeness. |
| C．Joy. | D．Thankfulness. |
| A．show friendliness to strangers |
| B．be used to hide true feelings |
| C．be used in the wrong places |
| D．show personal habits |
| A．Learn about their relations with others. |
| B．Understand their cultural backgrounds. |
| C．Find out about their past experience. |
| D．Figure out what they will do next. |
| A．Cultural Differences |
| B．Smiles and Relationship |
| C．Facial Expressiveness |
| D．Habits and Emotions |
Then a visitor showed up. “Do you want to write a song?” asked Anita Kruse, 49, rolling a cart equipped with an electronic keyboard, a microphone and speakers. Simran stared. “Have you ever written a poem?” Anita Kruse continued. “Well, yes,” Simran said.
Within minutes, Simran was reading her poem into the microphone. “Some bird soaring through the sky,” she said softly. “Imagination in its head…” Anita Kruse added piano music, a few warbling (鸣, 唱) birds, and finally the girl’s voice. Thirty minutes later, she presented Simran with a CD of her first recorded song.
That was the beginning of Anita Kruse’s project, Purple Songs Can Fly, one that has helped more than 125 young patients write and record songs. As a composer and pianist who had performed at the hospital, Kruse said that the idea of how she could help “came in one flash”.
The effect on the kids has been great. One teenage girl, curling (蜷缩) in pain in her wheelchair, stood unaided to dance to a hip-hop song she had written. A 12-year-old boy with Hodgkin’s disease who rarely spoke surprised his doctors with a song he called I Can Make It.
“My time with the kids is heartbreaking because of the severity of their illnesses,” says Anita Kruse. “But they also make you happy, when the children are smiling, excited to share their CD with their families.”
Simran is now an active sixth grader and cancer-free. From time to time, she and her mother listen to her song, Always Remembering, and they always remember the “really sweet and nice and loving” lady who gave them a shining moment in the dark hour.
1. Simran Jatar lay in bed in hospital because ________.
| A．most of her hair had fallen out |
| B．she was receiving treatment for cancer |
| C．she felt depressed and quit from school |
| D．she was suffering from a pain in her back |
| A．It helps young patients record songs. |
| B．It is supported by singers and patients. |
| C．It aims to replace the medical treatment. |
| D．It offers patients chances to realize their dreams. |
| A．Most children are naturally fond of music. |
| B．He was brave enough to put up performance. |
| C．The project has positive effect on young patients. |
| D．Singing is the best way to treat some illnesses. |
| A．Purple Songs Can Fly |
| B．Singing Can Improve Health |
| C．A Shining Moment in Life |
| D．A Kind Woman—Anita Kruse |
