1 . What happens when you cross stem cells from a frog heart and frog skin? Not much-that is, until you program those cells to move. In that case, you've created a xenobot, a new type of organism that's part robot, part living thing.
Now a team of scientists has used living cells from frog embryos and assembled them into entirely new life-forms. These millimeter-wide xenobots can move toward a specific target and pull themselves through after being cut.
These are novel living machines," says Joshua Bongarch a computer scientist and robotics expert at the University of Vermont who co-led the new research. "They're neither a traditional robot nor a known species of animal. It's a new living, programmable organism.
Xenobots borrow their name from Xenopus laevis, the name for the African clawed frog from which the researchers harvested the stem cells. They combined together well two different kinds of cells-heart and skin cells. The heart cells are competent in expanding and contracting, which aids the xenobot in locomotion, and the skin cells administer structure. Besides, they can't accomplish tasks without the help of computers.
By studying these curious organisms, researchers hope to learn more about the mysterious world of cellular communication. Plus, these kinds of robo-organisms could possibly be the key to drug transmission in the body or greener environmental clean-up techniques.
“Most technologies are made from steel, concrete, chemicals, and plastics, which degrade(降解)over time and can generate harmful ecological and health side effects the authors note in a research paper. "When these xenobots finally do stop working, they fall apart harmlessly.
“Promising as these organisms are, when we start to mess around with complex systems that we don't understand, we're going to get unintended consequences Michael Levin, a biophysicist and co-author of the study, says in a press statement.
1. What do we know about the xenobot?| A．It is not easy to degrade over time. |
| B．It can recover itself after being cut. |
| C．It will never die with a computer inside. |
| D．It is named after a kind of American frog. |
| A．Appearance. | B．Position. |
| C．Application. | D．Movement. |
| A．recycle waste in nature. |
| B．replace certain damaged organs. |
| C．deliver medicine inside patients. |
| D．improve communication technology. |
| A．Xenobots can be put into the market soon. |
| B．Xenobots are created totally by accident. |
| C．More research should be done on xenobots. |
| D．It is hard for people to understand xenobots. |
2 . Slowly but surely, we’re moving closer and closer to 5G world. From smart-home security to self-driving cars, all the internet-connected devices in our life will be able to talk to each other at lightning-fast speeds with reduced delay. Objectively speaking, the fastest 4G download speeds in the US top out at an average of 19.42Mbps. But by comparison 5G promises gigabit (千兆) speeds.
“5G is one of those heralds (使者),along with artificial intelligence, of this coming data age.” said Steve Koenig, senior director of market research for the Consumer Technology Association. The self-driving vehicle is a great emblem of this data age, and that is to say, it is a sign of time, because with one single task, driving, you have massive amounts of data coming from the vehicle itself, and a variety of sensors are collecting a lot of information to model its environment as it moves. It’s pulling in data from other vehicles about road conditions down the lane. It could be weather information, and also connected infrastructure (基础设施) construction. There’s lots of data behind that task, which is why we need the high speed.
And virtual reality glasses and headsets haven’t yet broken the mainstream, but tech companies are joyfully betting that these devices will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to assist — or even replace — smartphones.
Ericsson stated at February's Mobile World Congress how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on hardware for processing power.
But don’t get too excited. There’s still a lot of work to be done in the meantime, including various trials to make sure the radios play nicely with hardware and infrastructure construction so 5G isn’t concentrated only in big cities.
1. What is the first paragraph mainly about?| A．The security of 5G. | B．The present world of 5G. |
| C．The future of 5G. | D．The super speed of 5G. |
| A．exhibition | B．symbol | C．sponsor | D．explanation |
| A．They will be heavier than present ones. | B．They will process power on their own. |
| C．They will bring a big fortune to tech companies. | D．They will take the place of smartphones. |
| A．How to fully expand 5G coverage. | B．How to effectively reduce 5G trials. |
| C．How to nicely operate 5G hardware. | D．How to widely construct 5G big cities. |
3 . A music talent show launched by Mango TV has caught the attention of domestic TV channel viewers recently. This entertainment program, whose Chinese name translates to “Sisters Who Brave Winds and Waves”, invited 30 established actresses in their thirties, put them up in an apartment where they competed against each other and then selected five among them to form a new star group.
While young hopefuls are commonly considered to be the protagonists of music talent show, “Sisters Who Brave Winds and Waves” turns out to be an outlier. Apart from showcasing female stars musical talent, this show tries to deliver a positive message that age should not be the barrier for female entertainers to chase their dreams. The reality that most female entertainers have a short “shelf life” needs to be changed.
Attracted by the unique theme of Mango TV’s new show, many Chinese viewers were desperate for the show’s debut. The first episode aired last week received 10 million views within the first 20 minutes. Following the initial success, Mango Excellent Media’s stock rose by nearly 9% on Friday and another 7% on Monday. The company’s market value has now surpassed 100 billion yuan ($ 14 billion).
The value of this show was not only recognized by the market, but also the majority of Chinese viewers. Many netizens made good comments on the new show as it encouraged them to explore their inner potential no matter how old they are. One wrote, “Of course, young stars in their late teens and early 20s are beautiful. But I feel more impressed by these celebrities over the age of 30.” She went on to say that their confidence and ambition make them shine, and that age is just a number.
The Mango TV’s new show comes as a welcome relief, which demonstrates that charm and ambition is not limited to the young age. In fact, such age equality should extend to all professions to ensure that people with all ages could be treated equally in pursuit of their career goals.
1. What does the underlined word “outlier” in paragraph 2 mean?| A．Surprise. | B．Success. |
| C．Failure. | D．Exception. |
| A．The company’s market value has now exceeded 14 billion dollars. |
| B．Mango Excellent Media’s stock rose by nearly 16% over the weekend. |
| C．Nearly 10 million viewers watched the first episode within the first hour. |
| D．The debut of the new show did not affect the company's market value. |
| A．She thinks young celebrities are not attractive to the audience. |
| B．She holds the view that Mango TV’s new show is conventional. |
| C．She believes charm could make the celebrities shine no matter their age. |
| D．She complains about age discrimination in the entertainment industry,. |
| A．He/She aims to purse gender equality. |
| B．He/She protests against age discrimination. |
| C．He/She is a fan of musical shows. |
| D．He/She dreams about being an actor/actress. |
4 . For those who can stomach it, working out before breakfast may be more beneficial for health than eating first, according to a study of meal timing and physical activity.
Athletes and scientists have long known that meal timing affects performance. However, far less has been known about how meal timing and exercise might affect general health.
To find out, British scientists conducted a study. They first found 10 overweight and inactive but otherwise healthy young men, whose lifestyles are, for better and worse, representative of those of most of us. They tested the men’s fitness and resting metabolic (新陈代谢的) rates and took samples (样品) of their blood and fat tissue.
Then, on two separate morning visits to the scientists’ lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel. Before one of these workouts, the men skipped breakfast, meaning that they exercised on a completely empty stomach after a long overnight fast (禁食). On the other occasion, they ate a rich morning meal about two hours before they started walking.
Just before and an hour after each workout, the scientists took additional samples of the men’s blood and fat tissue.
Then they compared the samples. There were considerable differences. Most obviously, the men displayed lower blood sugar levels at the start of their workouts when they had skipped breakfast than when they had eaten. As a result, they burned more fat during walks on an empty stomach than when they had eaten first. On the other hand, they burned slightly more calories (卡路里), on average, during the workout after breakfast than after fasting.
But it was the effects deep within the fat cells that may have been the most significant, the researchers found. Multiple genes behaved differently, depending on whether someone had eaten or not before walking. Many of these genes produce proteins (蛋白质) that can improve blood sugar regulation and insulin (胰岛素) levels throughout the body and so are associated with improved metabolic health. These genes were much more active when the men had fasted before exercise than when they had breakfasted.
The implication of these results is that to gain the greatest health benefits from exercise, it may be wise to skip eating first.
1. The underlined expression “stomach it” in Paragraph 1 most probably means “______”.| A．digest the meal easily | B．manage without breakfast |
| C．decide wisely what to eat | D．eat whatever is offered |
| A．Their lifestyles were typical of ordinary people. |
| B．Their lack of exercise led to overweight. |
| C．They could walk at an average speed. |
| D．They had slow metabolic rates. |
| A．They successfully lost weight. | B．They consumed a bit more calories. |
| C．They burned more fat on average. | D．They displayed higher insulin levels. |
| A．A workout after breakfast improves gene performances. |
| B．Too much workout often slows metabolic rates. |
| C．Lifestyle is not as important as morning exercise. |
| D．Physical exercise before breakfast is better for health. |
5 . Mirroring body language is a way to bond and to build understanding. It is a powerful tool that we use without even knowing it.
The most obvious forms of mirroring are yawning and smiling. When you see someone yawn, you are likely to yawn immediately. Smiling is also pretty contagious-seeing a smiling person makes you want to smile too.
Mirroring body language is a nonverbal way to say “I am like you, I feel the same”. Research shows that people who experience the same feelings are likely to trust, understand and accept each other.
Women have the natural ability to pick up and understand body signals. Therefore, it is not surprising that a woman is more likely to mirror another woman than a man is to mirror another man. That's why women are regarded as better talkers, even if they might not really have more close friends.
It is interesting that when a man tries to mirror a woman's body language while she is talking, he may seem to her as caring, intelligent and attractive.
Mirroring body language is an excellent way to build trust and understanding quickly. If you want to set up a connection with a new person, mirror his or her gestures, sitting position, tone of voice and talking pace. This will make them feel that there is something about you that they like.
While mirroring body language gains you acceptance, you still need to take into consideration your relationship with the person you are mirroring. If you are in a lower social position and are mirroring the body language of your boss, he will view you as arrogant. However, if you want to defeat those who are trying to prove superior to you, mirroring their body language will help defeat them and change their position.
1. What does the underlined word “contagious” in paragraph 2 mean?| A．Affecting each other. | B．Powerful to show one's feelings. |
| C．Attractive to the others. | D．Being gentle to people around. |
| A．send wrong messages | B．hide true feelings |
| C．win others' acceptance | D．avoid misunderstanding |
| A．You will appear very attractive. | B．It will help to soften his position. |
| C．You will seem unacceptably proud. | D．It will be a good way to build trust. |
| A．It is important to copy the others' gestures. |
| B．Why women are regarded as better talkers. |
| C．Men is not good at nonverbal communication. |
| D．Mirroring body language can be a useful tool. |
6 . My family, my wife, Joan, our two teenagers Hannah and Joseph, and I, live in Atlanta with our two dogs.
Ten years ago, we moved into our dream house, a very big three-story home. It was a beautiful place, but as our children grew up, our sense of togetherness (团结) began to disappear slowly. In the big house, we sometimes seemed to be strangers to each other.
One day when Hannah was 14, she became upset about the difference between the world’s haves and the have-nots. She expected us to be “a family that makes a difference in the world, even if it’s a small difference. ” Joan asked her, “What are you willing to sacrifice? Your house? Your room? ” Hannah said yes to both. After talking it over as a family, we decided to sell our house and move to one that was half its size and price and donate (捐赠) the difference to those in need.
After a lot of research, we chose the Hunger Project, a US-based organization. It works with villagers in Africa, Asia and South America and helps them fight against poverty (贫穷). Our money went to pay for building two centers. Each has a meeting place, a bank and a health clinic (诊所). Together, the centers would serve more than 20 villages in eastern Ghana. We also traveled to meet the villagers and were blown away by their hard work and warmth.
To be honest, we were a little worried at first. Would we regard the new home as being too small for us? Or would we think we had given up too much? Two years later, I can tell you: It’s the best move we have ever made. While we worked together on our family project, we became much closer. As Hannah said the other day, “We learned how to really trust each other. ”
1. After they moved into a large house, the author’s family ______.| A．were not as close as before |
| B．wanted an even larger house |
| C．often went travelling together |
| D．often let strangers share their spare rooms |
| A．Hope for. | B．Look for. |
| C．Give up. | D．Build up. |
| A．To go abroad. |
| B．To help the poor. |
| C．To treat Hannah’s illness. |
| D．To save money for the future. |
| A．It was well worth it. | B．It was a bad decision. |
| C．It was a waste of money. | D．It wasn’t as satisfying as expected. |
7 . I was in the seventh grade, and we had moved to New Jersey in November. By then, everyone already had had their own friends, and no one wanted to talk to a new girl. To make things worse, they put me in ''Section L''. I found out later that everyone called Section L ''Loserville''. It was sort of an open secret that it was the section for troublemakers and not-so-smart kids. When I found out, I wanted to scream. I had always been a good student and had amazing friends, and now everyone thought I was a loser!
I did text my friends in Illinois almost every night, especially my best friend, Ana. At first my friends wanted to hear all about it. But then some stopped texting back once I said something about how miserable I was. One night when I was texting with Ana, I complained about another friend who had just done that. Anas texts came really fast for the next few minutes and they surprised me. She said that she was tired of hearing about how bad everything was in New Jersey, too. She said she did not want to hurt my feelings but that I needed to stop feeling so sorry for myself all the time, and I had to try to make things better.
The next day, I thought a lot about what Ana had said. She was right!
I wish I could say that everything changed overnight after that, but it didn't, I was still stuck in ''Loserville'', and some people were still mean (苛刻) to me, even though I tried to just stay out of their way.
But what did change was me — I stopped feeling so sorry for myself and did something about making friends. I signed up to make sets for the school play. I met a lot of new people there, and suddenly I had friends to say hi to in the halls!
I still miss Illinois sometimes, but life in New Jersey isn't so hard anymore. Even though I couldn't change my situation, I could change my attitude — and that made all the difference.
1. ''Loserville'' is a section for ________.| A．smart students | B．low achievers |
| C．class leaders | D．new comers |
| A．Ana didn’t text back to her | B．she was a good student |
| C．her friends hurt her feelings | D．she was unfairly treated |
| A．She managed to go back to Illinois. | B．She ended the friendship with Ana. |
| C．She began to make friends with others. | D．She fought back with her classmates. |
| A．Everlasting Friendship | B．Say Goodbye to ''Loserville'' |
| C．An Incident at School | D．Unhappiness in ''Loserville'' |
8 . When you’re sitting in class or behind your desk waiting for the clock to strike a time when you can go home, it is natural that your mind should wander (走神) a bit. It is common for your mind to wander to a vacation and even travel around the world. What if there is a way that you can travel around the world without having to pay any money?
A person that managed to make it around the world without spending much was Shantanu Starick. How did he trade off his service? Starick realized that as a photographer he had a service that people would usually be willing to pay money for, but he would instead offer his photography service to anyone who could provide him with food, shelter (住处) and transportation. Starick has been traveling for a surprising 30 months and has visited countries ranging from the United States to Ecuador.
In English-speaking countries, trading off services and communicating aren’t difficult for Starick. However, in farther areas where there isn’t an English- speaking person in sight it can be quite difficult. More than anything, the locals appreciate (欣赏) the effort behind trying to speak their language, even if you don’t exactly sound like a native speaker.
You can do it too!
Honestly, with a bit of confidence, drive and a skill you can trade, you’ll be able to do exactly the same as Starick.
Start thinking about what you can do to get around the world without paying money. With our social networks and the connectivity our world has, you can easily connect with and market yourself to people across the world without any effort.
1. What is the author’s purpose in writing the first paragraph?| A．To introduce the topic. |
| B．To describe students in class. |
| C．To give an example for the text. |
| D．To show people’s state of mind. |
| A．Join. | B．Exchange. |
| C．Stop. | D．Improve. |
| A．The skills. |
| B．The confidence to succeed. |
| C．The bravery to travel. |
| D．The effort to speak the local language. |
| A．His job is only traveling around the world. |
| B．He is too poor to afford the travels. |
| C．He has a skill to travel without paying much money. |
| D．He doesn’t hear of other languages except English. |
9 . Your glasses may someday replace your smartphone, and some New Yorkers are ready for the switch. Some in the city can't wait to try them on and use the maps and GPS that the futuristic eyewear is likely to include.
" I'd use it if I were hanging out with friends at 3 a. m. and going to the bar and wanted to see what was open," said Walter Choo, 40, of Fort Greene.
The smartphone-like glasses will likely come out this year and cost between $250 and $600, the Times said, possibly including a variation of augmented(增强的) reality, a technology already available on smartphones and tablets (平板电脑) that overlays information onto the screen about one's surroundings. So, for example, if you were walking down a street, indicators would pop up showing you the nearest coffee shop or directions could be plotted out and come into view right on the sidewalk in front of you.
" As far as a mainstream consumer product, this just isn't something anybody needs," said Sam Biddle, who writes for Gizmodo.com. " We're accustomed to having one thing in our pocket to do all these things," he added, "and the average consumer isn't gonna be able to afford another device (装置) that's hundreds and hundreds of dollars. "
9to5Google publisher Seth Weintraub, who has been reporting on the smartphone-like glasses since late last year, said he is confident that this type of wearable device will eventually be as common as smartphones.
"It's just like smartphones 10 years ago," Weintraub said. "A few people started getting emails on their phones, and people thought that was crazy. Same kind of thing. We see people bending their heads to look at their smartphones, and it's unnatural," he said. " There's gonna be improvements to that, and this a step there. "
1. One of the possible functions of the smartphone-like glasses is to _____.| A．program the opening hours of a bar |
| B．supply you with a picture of the future |
| C．provide information about your surroundings |
| D．update the maps and GPS in your smartphones |
| A．develop rapidly | B．get round quickly |
| C．appear immediately | D．go over automatically |
| A．necessary for teenagers | B．attractive to New Yorkers |
| C．available to people worldwide | D．expensive for average consumers |
| A．may have a potential market | B．are as common as smartphones |
| C．are popular among young adults | D．will be improved by a new technology |
