Scientists have created the world's first living, self-healing robots using stem cells (干细胞) from frogs. Named xenobots after the African clawed frog from which they take their stem cells, the ''machines'' are less than a millimeter wide — small enough to travel inside human bodies. They can walk and swim, survive for weeks without food, and work together in groups. ''These are entirely new life forms, '' said the University of Vermont, which conducted the research with Tufts University's Allen Discovery Center.
The researchers removed living stem cells from frog embryos (胚胎), and left them to hatch. Then, the cells were cut and reshaped into specific ''body forms'' designed by a supercomputer — forms ''never seen in nature''，according to a news release from the University of Vermont.
Xenobots even have regenerative abilities. When the scientists sliced into one robot, it healed by itself and kept moving. They don’t look like traditional robots - they have no shiny clothing or robotic arms. Instead, they look more like a tiny drop of moving pink flesh. The researchers say this is deliberate — this ''biological machine'' can achieve things typical robots of steel and plastic cannot. ''Traditional robots degrade over time and can produce harmful ecological and health side effects, '' researchers said in the study. ''As biological machines, xenobots are more environmentally friendly and safer for human health.''
According to the researchers, these robots could be used to clean up radioactive waste, collect microplastics in the oceans, or even carry medicine inside human bodies. Aside from these immediate practical tasks, they could also help researchers to learn more about cell biology - opening the doors to future advancement in human health and longevity. This sounds like something from a sci-fi movie. Some people even voiced their concern that humans might be taken control of by those xenobots. However, the researchers in the study say there is no need for alarm. They can't reproduce or evolve (进化).
1. What is this passage mainly about?| A．The advantages of a medical robot. |
| B．The application of robots in biology. |
| C．The general introduction of a living robot. |
| D．The medical value of African clawed frogs. |
| A．living longer | B．growing again |
| C．replacing old cells | D．defending against attacks |
| A．They can do everything that traditional robots can. |
| B．They can break up steel and plastic while degrading. |
| C．They are able to cure people of all kinds of diseases. |
| D．They are harmless to the environment and human health. |
| A．Doubtful. | B．Positive. |
| C．Cautious. | D．Casual. |
相似题推荐
【推荐1】Electronic timing is older than most people imagine and was used for the first time more than a hundred years ago at the 1912 Stockholm Olympics. Initially, the well-known company Ericsson was tasked with developing the technology, but it was the Swedish inventor Ragnar Carlstedt who eventually created the final product.
At the same time, Carlstedt introduced another invention: the finish line camera. The 1, 500-meter Olympic final was extremely close with Arnold Jackson from Great Britain winning by only 0.1 seconds. But it was impossible to decide on the silver medal since the two Americans Abel Kiviat and Norman Taber finished side by side. For the first time in history, the outcome of an Olympic event had to be settled based on a photo finish when Kiviat was judged to be “slightly ahead”.
The significance of these two inventions led a major newspaper to write: “Electronic timing at the Olympic Games. Simultaneous (同时发生的) timing and photography of contestants. A brilliant idea!”
The next step in timekeeping was the photo-finish camera with a time stamp imprinted on each picture, which was introduced at the 1932 Olympics in Los Angeles. The 1948 Olympics saw the introduction of another invention with the continuous slit camera (狭缝摄影机), where a film behind a narrow slit rolls (滚动) with the same speed as the runners. Four years later the clocks were connected to the slit camera giving a solution of 1/100 s. But it was not until 1972 that official times were recorded to the 100th of a second.
The next big step in the eighties was to make the camera digital to speed up the feedback (反馈). But the idea behind the slit camera was kept and is still the basis of all timing systems for athletics used today. The only difference is that now there is a very narrow sensor array ( 阵列传感器) instead of the moving film.
After a century technology has reached the point where the whole timing system can be stored in a smartphone. So in a way, the circle was closed when SprintTimer, a sports timer and photo finish app, was developed in the same place and precisely a hundred years after Ragnar Carlstedt.
1. What do we know about electronic timing?| A．It was created in recent years. |
| B．It was first introduced at the Olympics. |
| C．It was developed by the well-known company Ericsson. |
| D．It was perfected by the Swedish inventor Ragnar Carlstedt. |
| A．The increasing need for a finish line camera. |
| B．The excellent performance of Arnold Jackson. |
| C．The significant role of Carlstedt's another invention. |
| D．The intense competition of the 1,500-meter Olympic final. |
| A．It avoided the use of a moving film. |
| B．It rolled with the same speed as the runners. |
| C．It made a 100th-of-a-second record possible. |
| D．It adopted a new idea for all timing systems used today. |
| A．Further improvement was discontinued. |
| B．The problem was back to the origin. |
| C．A new invention was created. |
| D．The issue was resolved. |
【推荐2】With artificial intelligence (AI) and robotic technology improving at impressive rates, there are some who worry that there’s a risk of artistic and creative people being replaced. A new study by the Korean Institute of Industrial Technology, however, is showing exactly why that can’t and shouldn’t happen. It all started when the South Korean company posed this question: Can robots replace conductors?
Over a year ago, work to develop automaton (自动化) began. At first, it was designed like a machine, and didn’t live up to expectations. Then the company sought ways to improve it. In the end, it was given two arms with joints to copy wrists and elbows, allowing it to move a stick similarly to how a human conductor would move it. It was named the EverR 6 robot, and stands at 1.8 meters. It was finally time to figure out how it could follow through on its musical role.
“We got involved in this project to see how far robots can go in more creative fields like the arts, and what the challenges are,” Dong-wook Lee, a senior researcher at the Korean Institute of Industrial Technology said.
In order to pull this off, Dong-wook Lee cooperated with the Busan Philharmonic Orchestra. The 12-minute piece they planned to perform, “Feel” by Il-hoon Son, was created specifically for this event. It was created with the strengths of both EverR 6 and the human conductor, Soo-yeol Choi, in mind.
To pull off this impressive performance, the robot was preprogrammed to conduct through 30 cycles of beat patterns. Meanwhile, it was up to the human conductor to lead the orchestra in creating an improvisational (即兴的) score, adding depth to the otherwise planned piece.
Together, they pulled off a masterful performance that the audience seemed more than happy to have had the opportunity to witness it firsthand!
With the concert having gone so well, this is only the start of EverR 6. Still, no matter the improvements they’re able to make to this Android robot, the human conductor isn’t concerned about being replaced.
“Let’s leave the accuracy to the robots,” Soo-yeol Choi said, “but the musical and artistic aspects to a human conductor.”
1. What is paragraph 2 mainly about?| A．The function of the EverR 6 robot. |
| B．The development of the EverR 6 robot. |
| C．The EverR 6 robot’s role as a conductor. |
| D．The difficulty in designing the EverR 6 robot. |
| A．It is a piece familiar to the audience. |
| B．It is a piece showing the human-robot cooperation. |
| C．It is the only piece that EverR 6 will perform. |
| D．It is a piece requiring great ability to conduct. |
| A．He corrected the robot’s mistakes. |
| B．He programmed the EverR 6 robot. |
| C．He led the improvisational section of the performance. |
| D．He was the main conductor of the Busan Philharmonic Orchestra. |
| A．Unclear. | B．Uncaring. | C．Supportive. | D．Doubtful. |
【推荐3】The rechargeable lithium-ion (锂离子) battery market is worth more than $50 billion. Lithium-ion batteries, whose demand continues to go up day by day, are used in a wide range of electronic devices. They are made of four main components, and cathode (阴极) is one of them. The cathode’s active material type is what determines the capacity of a battery.
A recent study, led by Wang Yan, a material scientist of Worcester Polytechnic Institute, finds that lithium-ion batteries made with recycled cathodes work better than those with new cathodes.
“ The battery industry is expected to soar in the next decade. This high demand has led companies to go to extremes, like increasing deep-sea mining, to gain access to the minerals used in lithium-ion batteries, ” Wang said. “ Mining minerals will have environmental impacts. Recycling spent lithium-ion batteries offers a way out. ”
But until now, the prospect of using recycled materials in lithium-ion batteries has some manufacturers (制造商) worrying that it could impact performance. Thus, lithium-ion batteries are still not widely recycled. Aware of decreasing resources and environmental impact. Wang and other researchers set out to find a way to make recycling lithium-ion batteries economically practical. Through experiments, they could recover more than 90% of the key metals from spent batteries. These recovered metals became the basis of the new recycled battery’s cathode’s active material.
In tests between Wang’s team’s recycled batteries and brand-new batteries of the same composition, the recycled batteries outperform (胜过) the new ones in their ability to maintain capacity. It took 11,600 charge cycles for recycled cathode batteries to lose 30 percent of their original capacity. That was about 50 percent better than the 7,600 observed cycles for new cathode batteries, the team reported. Those thousands of extra cycles could translate into years of better battery performance, even after repeated use and recharging.
1. What can we learn about lithium-ion batteries from the first paragraph?| A．They are high in price. | B．They are in great demand. |
| C．They are limited in use. | D．They are simple in composition. |
| A．decrease rapidly | B．develop smoothly | C．rise quickly | D．appear |
| A．Ineffective battery performance. | B．Decreasing mineral resources. |
| C．Serious environmental problems. | D．Difficult recycling techniques. |
| A．The battery industry is going to develop dramatically. |
| B．Recycling batteries reduces impact on the environment. |
| C．Scientists can recover key materials from spent batteries. |
| D．Recycled batteries outperform new ones in charging circles. |
【推荐1】From changes in daylight across seasons to the artificial lighting choices in workplaces, it’s clear that the quantity and quality of light that a person encounters can significantly impact mood. Now, scientists at Brown University think they know why.
In a new study published in a science magazine, the research team used functional MRI(磁共振) to reveal how light-intensity signals reach the brain, and how brain structures involved in mood process those signals. The study demonstrated that some regions of the cerebral cortex(大脑皮层) involved in cognitive(认知的) processing and mood show sensitivity for light intensity.
The discovery has implications for understanding mood problems like seasonal affective disorder and major depressive disorders, as well as how to treat them, said lead study author Jerome Sanes. “Identifying this pathway and understanding its function might directly promote development of approaches to treating depression,” Sanes added.
The findings build on previous research by study co-author David Berson, a neuroscience professor, who in 2002 discovered special light-sensing cells in the eye. To determine whether light intensity adjusts the human prefrontal cortex, the researchers used functional MRI to explore whole-brain activation patterns in 20 healthy adults.
In a relatively simple experiment, according to Sanes, participants viewed four different levels of light intensity through glasses. They viewed light intensities ranging from dark to bright, for 30 seconds each. To keep them alert, they concurrently performed a task requiring them to state the difference between two tones.
They found that light suppressed(压制) activity in the prefrontal cortex in proportion to the light intensity. In this study, the researchers also showed that the prefrontal regions of the human brain have light-sensitive signals, which, Sanes said, may explain the effects of light intensity on complex emotional and cognitive behaviors.
1. What might be a potential application of the research findings?| A．A method of making artificial light. |
| B．A possible treatment for depression. |
| C．A way to do research on new areas about light. |
| D．A possible further research on light-sensing cells. |
| A．Somehow. | B．Passively. | C．Suddenly. | D．Meanwhile. |
| A．People are alert to different visual light. |
| B．Complex emotional behaviors depend on light. |
| C．Parts of the brain involved in mood are sensitive to light intensity. |
| D．Some regions of the cerebral cortex can adjust light-sensing cells. |
| A．Health. | B．Education. | C．Lifestyle. | D．Culture. |
【推荐2】SYDNEY —Australian scientists have designed a system which uses microwaves to break down plastic into an environmentally friendly by-product.
Head of Electrical Engineering at Australia’s James Cook University, Prof. Mohan Jacob revealed on Thursday that by using microwaves, plastic waste can be converted into biochar(生物炭), charcoal that can be used as a soil conditioner.
“We are developing a processing room, which could process many kinds of plastic materials, up to 5 kilograms of waste,” Jacob said. “It will be a typical example system for the development of biochars from different types of plastics under various conditions.” Jacob explained that microwave energy is used to heat the plastic waste above 600 degrees centigrade within the custom-made room, where it ends up as a biochar, which can then be used to improve the properties of soil.
Currently underway is step one of the project, testing the room, after which, step two will involve improving the energy efficiency of the system and maximizing the yield of by-products. If all goes to plan, step three will be to construct a medium scale waste processing system which is customizable and can be installed remotely.
Jacob said that with the average person using 130 kg of plastic every year, there is an urgent need for developing better ways of processing it.
“Perhaps contrary to popular opinion, plastic is an indispensable material in modern life. It is cheap, competent, lightweight, and has many benefits like maintaining food quality and safety and preventing waste,” he said.
However, “abandoned plastics endanger our marine wildlife, and have begun to enter the food chain. There is an urgent need for developing technologies to recover plastic waste.”
1. How does the system function?| A．Microwaves are used to produce plastic. |
| B．Plastic waste is heated in the microwaves. |
| C．Plastic waste is cut into pieces and buried into the soil. |
| D．Microwaves change plastic waste into biochar by heating. |
| A．Plastic consumption now is acceptable. |
| B．Plastic should be abandoned in our life. |
| C．The system of processing plastic has come into use. |
| D．Finding better ways to deal with plastic waste is urgent. |
| A．Make up for a loss in time. |
| B．Find or regain lost possession. |
| C．Extract or recycle an energy source for reuse. |
| D．Return to a normal state of health, mind or strength. |
| A．3 steps of processing plastic waste. |
| B．A way of producing plastic products easily. |
| C．A new system of breaking down plastic waste. |
| D．A program designed for plastic use in the daily life. |
Many kids don’t drink enough water daily, according to a new study. The study’s lead author, Erica Kenney, at first planned to look into the amount of sugary drinks kids were drinking in schools. However, during her research she found that many kids were simply not drinking enough water.
Kenney and her team examined data from a group of 4,000 children, aged 6 to19. The data was taken from the National Health and Nutrition Survey, a study on the health of children in the United States done each year by the Center for Disease Control and Prevention.
While looking through the survey results, she noticed that more than half of the kids who took part in the study were dehydrated (脱水的). Of that group, boys were 76% more likely than girls not to have enough water in their system. Nearly one quarter of the kids in the survey reported drinking no plain water at all.
“These findings highlight (突出) a possible health issue that wasn’t given a lot of attention in the past,” Kenney said in a statement. “Even though for most of these kids this is not an immediate and great health risk, this is an issue that could really be reducing quality of life and well-being for many children and youth.”
The United States-National Agriculture Library says average kids need between 10 to 14 cups of water every day. This water can come from a mix of drinks and foods that contain high amounts of water, such as celery, melons or tomatoes. It is also suggested that fluids (液体) come from water instead of sugary drinks that are high in calories and can lead to weight problems.
1. What was Erica Kenney’s purpose in doing the study?| A．To study if kids drink enough water daily. |
| B．To prove that sugary drinks are harmful to kids |
| C．To show what kind of sugary drinks kids love. |
| D．To find out how many sugary drinks kids drink at school. |
| A．school kids cannot find drinkable water easily |
| B．boys are more likely to get dehydrated than girls |
| C．sugary drinks are very popular with school kids |
| D．most kids know the importance of drinking plain water |
| A．should drink plain water to lose weight |
| B．can try to take in water from sugary drinks |
| C．can eat celery, melons and tomatoes for water |
| D．should drink no more than 10 cups of water every day |
| A．don’t like drinking water |
| B．prefer sugary drinks to water |
| C．are at risk of health problems |
| D．don’t drink enough water daily |
【推荐1】In a recent announcement, Harvard and the Massachusetts Institute of Technology（MIT）said that they have joined forces to offer free online courses in an effort to attract millions of online learners worldwide.
Beginning this fall, a number of courses developed by teachers at both universities will be offered online through a new $60 million program, known as edX. “Anyone with an Internet connection anywhere in the world can use our online courses,” Harvard President Drew Faust said during a meeting to announce the plan.
MIT has offered a program called OpenCourseWare for ten years that makes materials from more than 2,000 classes free online. It has been used by more than 100 million people. In December, the school announced it also would begin offering a special certificate, known as MITx, for people who complete certain online courses. Harvard has long offered courses to a wider population through a similar program.
The MITx will serve as the foundation for the new learning platform.
MIT President Susan Hockfield said more than 120,000 people signed up for the first MITx course. She said Harvard and MIT hope other universities will join them in offering courses on the open-source edX platform.
“Fasten your seatbelts,” Hockfield said.
Other universities, including Stanford, Yale and Carnegie-Mellon, have been experimenting with teaching to a global population online.
The Harvard-MIT program will be monitored by a not-for-profit（非盈利的）organization based in Cambridge, to be owned equally by the two universities. Both MIT and Harvard have provided $30 million to start the program. They also plan to use the edX platform to research how students learn and which teaching methods and tools are most successful.
1. According to this text, edX is _______.| A．a part of the free MIT OpenCourseWare |
| B．a free computer program by MIT and Harvard |
| C．a Harvard-MIT platform of free online courses |
| D．a free program online for universities worldwide |
| A．Universities have been trying online courses. |
| B．About 2,000 online courses have been offered. |
| C．Over 100 million people have finished courses online. |
| D．Stanford and Yale together have courses similar to edX. |
| A．Get ready for the difficulties |
| B．Get ready for this educational change |
| C．Get prepared to complete the online courses |
| D．Get prepared to make materials for the edX courses |
| A．It is first offered as part of the edX learning program. |
| B．It is another free MIT-Harvard online learning program. |
| C．It is a standard to recognize online learners’ achievement. |
| D．It is a new kind of free online course of Harvard and MIT. |
【推荐2】It is the golden decade,the time in your life when you are carefree and at your happiest.Never again will you enjoy the freedom and thrills of your 20s.A new study has now confirmed the fears of anyone approaching middle-age-people's 20s are their happiest years.
But,while researchers warn of lower life satisfaction for 40 years,there is hope.Their findings show that life does get better at 65,with happiness levels rising.Dr Ioana Ramia,from the University of New South Wales in Australia,said,"Satisfaction over life decreases from the early 20s,plateaus for about 40 years and then increases from about 65 up."
The aim of the research was to help develop policy to target specific age groups.Dr Ramia and her team found that happiness follows a U-curve with the highest levels experienced by those aged 15 to 24 and over 75.
Dr Ramia said,couples reported greatest satisfaction at life just before having their first child and a decrease from the child's first year of life through to when the child reaches six years old and starts school.She said,"It then stays low,but increases slightly,and is the highest around the age of 80.So that's something to look forward to."Her team's research shows a strong connection between the middle-age happiness state and employment opportunities and financial situations,when"money and...jobs matter most".
There was a greater emphasis on the quality of housing itself into middle age and beyond,along with neighborhood and community."At this time happiness is at its lowest and it only starts to increase when people start focusing on other things,like their free time,"said Dr Ramia.Safety was an important aspect of life satisfaction in every age group,while health appeared twice-in the mid-30s with the first awareness of physical fallibility or illness,and again later in life,she said.
Though her research had shed some light onto the drivers of happiness,Dr Ramia said the peak at young and old age remained poorly understood,with question marks around how satisfaction could remain constant across the major parameters described yet manage to increase with age overall. Defining what"satisfaction"was and how it was rated by subjects was also a challenge for future research,she said.
1. The early 20s are thought to be the happiest years possibly because people| A．enjoy their school life very much then |
| B．can enjoy more freedom during that period |
| C．usually have lots of friends in those years. |
| D．are going to have their own family in their life |
| A．keeps a relatively stable level |
| B．keeps changing |
| C．reaches a very low level |
| D．turns more complex |
| A．the factors influencing people's satisfaction at life |
| B．the differences between the young and the old |
| C．the reasons why happiness follows a U-curve |
| D．the matters concerning the middle-aged group |
| A．We still have a poor understanding on the old. |
| B．The drivers of happiness need further research. |
| C．It's still a challenge to remain happy in our life. |
| D．People are hard to be satisfied because of their age. |
【推荐3】Jeff Bezos, the world’s wealthiest person, was just five when American astronauts stepped on the surface of the moon on July 20, 1969. However, he’s never forgotten the black-and-white footage from the historic moment. Since then, the moon has always been the center of his space dreams which are channeled through his spaceflight company, Blue Origin.
On May 9, 2019, at a meeting held in Washington, DC, Bezos came one step closer to achieving his dream of sending people there, when he presented a model of a lander, Blue Moon, designed to carry both humans and goods to the satellite.
Though details of how Blue Moon will be sent to space remain unclear, Bezos is confident it’ll be ready for its mission (使命) by 2024. He considers it unavoidable to settle in space given our ever-increasing population and fewer resources. Unlike those seeking a home on another planet, Bezos thinks humans will be living in orbital space settlements, which are similar to the International Space Station, except much bigger, each housing millions of people. Space taxis would make it easy for humans to travel between settlements.
But first we need to develop a cheaper way to travel between space and Earth. Bezos may have solved the problem partly by removing the biggest cost of spaceflights—single use rockets—with Blue Origin’s reusable New Shepard rocket, which has made several trips to space and back since 2015.
To encourage future space dreamers, the company’s recently built a free online club that will keep members informed of its progress and challenge them to find solutions to help humans and save earth. It invites students of all ages to draw or write how they imagine humans living and working in space on a self-addressed, stamped postcard and send it to the “Club for the Future” by July 20, 2019. The first 10,000 postcards will be sent to space aboard the New Shepard rocket later this year. When it returns to Earth, the postcards, stamped “flown to space,” will be returned to their owners.
1. What does Paragraph 1 mainly talk about?| A．An impressive historic moment. |
| B．The beginning of Bezos’ space dream. |
| C．The exciting news of sending man to space. |
| D．Bezos’ secret of becoming the wealthiest person. |
| A．Overpopulated. | B．Solar-powered. |
| C．Energy-hungry. | D．Conveniently accessible. |
| A．Space taxis. | B．Single use rockets. |
| C．New Shepard rocket. | D．Orbital space settlements. |
| A．To help humans and save earth. |
| B．To challenge students of all ages. |
| C．To build a new way of sending postcards. |
| D．To encourage future space dreamers. |
【推荐1】Landscapes are not only the setting for history; they are also a major source of our sense of history and identity. Read them right, and historical landscapes can be more informative than any other kind of source. This is even more the case with sacred landscapes, which were reflection of our ancestors’ beliefs about their relation to the cosmos and can still today seem to hold a spiritual influence.
Over the years, I’ve had the good fortune to have spent time in many historical landscapes, hoping to picture something of the spirits of the people who shaped them over the centuries. I still remember years ago walking along the Inca sacred lines around Cusco, Peru. In this ancient landscape, old sites that once belonged to Incan royals had become torn Spanish mansions. Or many years ago, before the Gulf Wars, I took a journey through south Iraq, the heart land of civilization, where the desert is still crossed by dried-up riverbeds of the Euphrates and canals that once sustained the world’s first cities.
Britain also has its own magical ancient landscapes. From the Mesolithic to the Bronze and Iron Ages, rich layers of the past are still present in the landscape surrounding Stonehenge, even as traffic rushes down the A303. It is the A303 that is the problem. As the main road to the south west from the home counties, the road runs right past Stonehenge. One of humanity’s most famous monuments, Stonehenge is an archaeological landscape without parallel in Europe, and perhaps the world. The first circle at Stonehenge was made 5,000 years ago, and the great stone circle itself in a round 2,500 BC — the age of the pyramids! And the mysteries of this amazing monument and the complex prehistoric societies that produced it are by no means exhausted, as new discoveries continue to show.
All the more worrying to me then, this unique landscape is currently at the centre of a projected plan by Highways England, which aims to relieve congestion on the A303 by creating a four-lane road with a 1.8-mile tunnel, and an expressway interchange 1.5 miles to the west. While the National Trust and English Heritage have offered qualified support for the plan, UNESCO has expressed its opposition. Meanwhile, the Stonehenge Alliance, a group of archaeologists and environmental campaigners, says the plan is based on inadequate and obsolete information. In the end, the argument is about the totality of an ancient landscape, and that includes the ancient astronomical alignment that was purposefully chosen by our ancestors, and that will, in my view, be wrecked by the expressway interchange. Time perhaps for a rethink in the name of future generations?
1. What can historical landscapes offer us?| A．Details of ancient lifestyle. | B．Sacred writings |
| C．Rich historical information | D．Breathtaking sights. |
| A．Different architecture. | B．His sense of belonging. |
| C．The rise of ancient cities. | D．The spirits of ancestors. |
| A．The first stone circle has a longer history than the pyramids. |
| B．New discoveries have solved the mysteries of the monument. |
| C．The ancient monument must have been the heart land of civilization. |
| D．The landscape surrounding Stonehenge has rich layers of the present. |
| A．He is for it because it will benefit the future generations. |
| B．He keeps cool but believes a better solution could be adopted. |
| C．It should be stopped because it will destroy the totality of the monument. |
| D．It is rather practical especially with qualified support from the government. |
【推荐2】When students got their textbooks at the beginning of the year at San Mateo High School, they also received the Yondr pouch Youdr (口袋), a locking device for their phones. The phone slides into it and gets locked through a magnetic (磁力的) device. It’s not unlocked again until the final bell rings. The procedure will repeat every day for the rest of the school year.
Adam Gelb, the vice-president, ran a pilot project last year with 20 students and decided to do a school-wide, bell to bell program for this school year. The Yondr pouch is a start-up in San Francisco with a mission to create phone-free spaces, something that is the very thought with Gelb.
“I really think it’s about being present and engaging in the adult that’s trying to teach you, and your peers that might be in your small group. That’s part of the main philosophy that we're trying to spread,” he said.
Brad Friedman, another teacher at the school, said he was becoming concerned with overuse of phones at school. He said he often saw students completely lost on their phones, some not socializing at all with other students.
This week, he’s already seeing the difference. “Everyone else was socializing and eating lunch together. That’s what I wasn’t seeing enough of when phone usage is at its worst,” he said.
A senior at San Mateo High School Djelani Phillips-Diop said he definitely panicked at first when he heard he had to lock his phone. “I panicked, I guess. Last year when we had phones, I was using it every day,” he said.
In case of emergency, every classroom has the unlocking device. Teachers still have access to their own cellphones and desk phones. “We’ve gotten all 1,700 students unlocked with a matter of minutes,” said Gelb.
We spoke to four students who, despite their initial panic, agreed that a phone-free school experience has its benefits.
1. What can we learn about the Yondr pouch from paragraph 1?| A．It is a device to lock phones. | B．It is a bell to unlock phones. |
| C．It is a device to be used for a year. | D．It is a phone intended for students. |
| A．create space to use phones freely |
| B．help the students to be more outgoing |
| C．encourage more mutual communication among students |
| D．help the students to realize the harm of overuse of phones |
| A．Concerned. | B．Favorable. |
| C．Disapproving. | D．Doubtful. |
| A．The students were willing to have their phones locked at first. |
| B．The phone will get unlocked automatically when there is an emergency |
| C．Students prefer eating lunch together with their phones in hand. |
| D．Some students came to realize the benefits of the phone-free program. |
【推荐3】The church seems cold this morning， even after all the people, friends and family, fill the benches. I sit here in silence,in shock and denial. This was not supposed to happen. What about our dreams,or our plans？ We were going to raise our children,travel the world, and grow old together. I'm only 37, a typical housewife. I don't know if I can do all this alone﹣two children, no father. What do I do or say？
The faces of so many people confuse me as they come to pay their last respects. Some have real sorrow;I can see it in their eyes. The others seem to just say﹣I told you so. Those famous last words：I﹣told﹣you﹣so. How I can't stand them. And the pointing fingers as so﹣called family and so﹣called friends pick me out of the crowd for others to see. I want to scream and wake up but I can't do anything but sit there. How can they be so blind？ I fell in love with a man. Love knows no boundaries.
He was a good man, hardworking,caring and kind. He was retired from the Navy and a gentleman. He was sensitive to others' needs，the kind of man that knew what to do or say, how to humor any situation and calm everyone's fears. I remember our first child was a big surprise to both of us. I remember when I told him the news. He fell off his chair,saying over and over in disbelief, "But I'm almost sixty. " After a few months he started planning our next and even doing his famous little dance whenever he discussed the idea.
A man， thirty years older than I， lies in a coffin. Flowers， the American flag and his VFW comrades surround him， paying tribute （颂词） to him as the man he really was. And I sit alone here,with our two children, in silence, praying that this cold morning at church is only a nightmare and I will awake to his loving arms again.
Our son， our first born,his joy and pride,sit to the right of me, seeming just as confused as me. I look over at him. How he looks like his father﹣blonder hair, tall and skinny﹣even his Irish temperament （气质） and that naughty look in his eyes. He's wearing his father's watch. It's too big for him but he refused to take it off. I know he'll keep it safe. Our second, the little angel and Daddy's little girl, lies in her stroller in the aisle, sound asleep. She'll never remember the man she called "Da. "
1. The last paragraph， which is italicized （斜体的）， does not lie where it originally was. It's better for it to go back______ .| A．between para. 1 and para. 2 |
| B．between para. 2 and para. 3 |
| C．between para. 3 and para. 4 |
| D．to the very front |
| A．9 | B．7 | C．3 | D．1 |
| A．our next dance |
| B．our next baby |
| C．what for us to do next |
| D．our next news |
| A．the woman's family were against her marriage to the man |
| B．none of the people there showed real sympathy to the woman |
| C．the woman did something wrong |
| D．the family had lived a happy life before the man died |
| A．Sad |
| B．Loving |
| C．Inseparable |
| D．Complaining |
