1 . It is a question people have been asking for ages. Is there a way to turn back the aging process?
For centuries, people have been looking for a “fountain of youth”. The idea is that if you find a magical fountain, and drink from its waters, you will not age.
Researchers in New York did not find an actual fountain of youth, but they may have found a way to turn back the aging process. It appears the answer may be hidden right between your eyes, in an area called the hypothalamus (下丘脑). The hypothalamus is part of your brain. It controls important activities within the body.
Researchers at New York’s Albert Einstein College of Medicine found that hypothalamus neural (神经的) stem cells also influence how fast aging takes place in the body.
What are stem cells(干细胞)? They are simple cells that can develop into specialized cells, like blood or skin cells. Stem cells can also repair damaged tissues and organs.
Dongsheng Cai is a professor at the Albert Einstein College of Medicine. He was the lead researcher in a study on aging in mice. He and his team reported their findings in the journal Nature, Cai explained when hypothalamus function is in decline, particularly the loss of hypothalamus stem cells, and this protection against the aging development is lost. it eventually leads to aging.
Using this information, the researchers began trying to activate, or energize, the hypothalamus laboratory mice. They did this by injecting the animals with stem cells, Later, the researchers examined tissues and tested for changes in behavior. They looked for changes in the strength and coordination (协调) of the animals muscles. They also studied the social behavior and cognitive ability of the mice. The researchers say the results show that the treatment slowed aging in the animals, Cai says injecting middle-aged mice with stem cells from younger mice helped the older animals live longer.
But these results were just from studying mice in a laboratory. If the mice can live longer, does that mean people could have longer lives? The next step is to see if the anti-aging effects also work in.
1. In Paragraph 2 a “fountain of youth” is mentioned to ________.| A．introduce the main topic |
| B．show a hidden secret. |
| C．describe scientists research |
| D．recommend a way to stay young |
| A．stem cells develop into specialized cells |
| B．there are important activities within the body |
| C．hypothalamus neural stem cells fail to protect against aging |
| D．the hypothalamus fails to repair damaged tissues and organs |
| A．They did experiments to see how stem cells work. |
| B．They studied mice to find their connection with humans. |
| C．They have found a possible way to slow the aging progress. |
| D．They have found no changes in mice s behavior during the experiment |
| A．They will help some animals live longer. |
| B．They will announce the fountain of youth doesn’t exist |
| C．They will develop products to help people live a longer life immediately |
| D．They will do research to see if what they have found in mice will apply to humans. |
2 . When it comes to sitting properly, we all know the correct way even if we don' t do it to the letter. No crossed legs, bottoms touching the back of the chair and feet on the ground. But even if you' re doing it right, sitting for long periods is shockingly bad for you. It has been described as the new smoking, linked to heart disease and even cancer. There is no doubt we should all try to do less of it. But perhaps we could also do it better.
A classic survey, published in 1953, described 100 different sitting postures adopted by 480 cultures around the world. Among the most common were sitting cross-legged, kneeling and the deep squat (深蹲), with feet flat on the ground and bottoms resting on or just above it. Even in Western cultures, these are preferred sitting positions among young children. But Westerners tend to prefer chair use from an early age, insisting children sit on seats in school.
One big problem with this desire for chairs is that they make sitting so, well, sedentary (久坐不动的). Consider the Hadza, a group of hunter-gatherer people in Tanzania. They spend around 9 hours a day sitting. However, they squat and sit on the ground in various positions, and this involves high levels of muscle activity. The supportive nature of chairs, with their high backs and armrests, removes this effort perhaps the reason that people love them.
So what' s the best way to sit? Josette Bettany-SaItikov at Teesside University, UK has found that kneeling can help keep the spine in a better position as does squatting. We might also take inspiration from traditional cultures like the Hadza. "Use a variety of postures and preferably not just still postures but some which allow movement," says Bettany-Saltikov.
Bettany-Saltikov believes that we should be rethinking what it means to do a desk job. "We still need to design workplaces that enable people to be productive while being lightly active, like with under-table cycling or walking desks," she says. For now, if your job is sedentary, don' t forget to stand up regularly and move around.
1. What does the author think of sitting properly for long?| A．It still does some harm. | B．It improves body shape. |
| C．It can prevent heart disease. | D．It may cause smoking-related illnesses. |
| A．Children should sit in their preferred manner. |
| B．Children should take their seats while sitting. |
| C．Children should practice sitting cross-legged. |
| D．Children should learn different sitting postures. |
| A．They sit for short periods of time. | B．They sit for the purpose of exercise. |
| C．They use some muscles while sitting. | D．They remain generally still while sitting. |
| A．Combine exercise and their work. | B．Improve their productivity at work. |
| C．Kneel or go cycling as often as possible. | D．Start exercising as soon as they leave work. |
3 . Online Bachelor's Degrees and Programs
The overview
Colleges offer online degrees in a range of fields. Click on a degree program to explore what courses you take, how long the program takes to complete, career options and average salary. For example, to earn an online health science bachelor's degree, you would take courses in public health, health communications and epidemiology(流行病学).
The benefits
Pursuing an accredited(官方认可的)online bachelor's degree can help you take the next step in your career. Through your program, you'll attend online lectures, study from home manage a busy schedule and interact virtually with professors and classmates.
The applicants
An online college degree may appeal to those who want more flexibility in completing their education, or who want to take classes while working full time or parenting. Choosing where to register online will likely be challenging, but below you'll find tools, advice and other resources to make your search easier.
Best online bachelor's programs
U. S. News evaluated several factors to rank the best online bachelor's degree programs, including graduation rates and support services available remotely.
| School name | Tuition per credit | Application deadline | Financial aid available |
| University of Georgia | $ 326 | May 1 | Yes |
| Georgia Washington University | $ 615 | June 10 | No |
| University of Arizona | $ 525 | July 12 | Yes |
| North Carolina University | $ 900 | February 15 | Yes |
To see the full ranking list, please click here.
1. What will you do after attending online degree programs?| A．Get a degree for free. | B．Attend lectures in a hall. |
| C．Take some related courses | D．Talk with teachers face to face. |
| A．Georgia Washington University. | B．University of Georgia. |
| C．North Carolina University. | D．University of Arizona. |
| A．On the Internet. | B．In a magazine. |
| C．In a textbook. | D．In a newspaper. |
4 . In late May, storms flooded streets in Florida. The floods made cars sink and turned roads into brown rivers. Flash flooding can happen when storm drains get blocked up and, especially during hurricanes, overflow into streets. It’s the leading cause of weather-related deaths.
A team of local middle-school students has a plan to stop this ongoing problem. Alyssa, Bianca and Jose are sixth-graders. The Doral students designed a device to warn city workers when and where there is a danger of flooding. The team is one of five grand-prize winners of the Samsung Solve for Tomorrow Contest. The contest asked for science, technology, engineering and math (STEM) solutions to the biggest challenge facing a school community.
“I’ve been living here my entire life, and all of us have encountered problems with flooding,” says Bianca. “We knew that was the problem we were going to tackle.”
The students’ device uses a laser system called lidar, which stands for “light detection and ranging.” The device, if approved by the city government, could be attached to Doral’s 2,575 storm and manhole drains — one device per drain. If a drain gets blocked with sediment (沉积物), the device could send a warning message to the city’s stormwater management office. Then the stormwater manager could send someone to clean the drain.
Starting in March, the school was closed, so team meetings went virtual. Luckily, says Bianca, “We already had a prototype device, and we just had to adjust it some more ” They also had to pitch their idea virtually to contest judges.
Twenty finalist teams were cut down to the five grand-prize-winning teams. Each of the five teams won $100 000 for technology and supplies for their science classrooms. “We put m a lot of effort and had to trust each other and that each one knew what they were talking about,” says Alyssa.
1. How does the author start the text?| A．With an image. |
| B．With some figures. |
| C．By raising questions. |
| D．By stating a phenomenon. |
| A．It is made up of five middle school students. |
| B．Its aim is to solve the problem of the drain flooding, |
| C．It has won first prize in the Samsung Solve for Tomorrow Contest. |
| D．Its members are trained in science, technology, engineering and math. |
| A．To list their challenges. |
| B．To explore their motivation. |
| C．To express their determination. |
| D．To prove their responsibility. |
| A．To inform the authorities when a drain is blocked. |
| B．To arrange for someone to clean the drain. |
| C．To prevent the drain from being blocked. |
| D．To help clear away sediment in the drain. |
5 . Motion sickness is an uncomfortable feeling. The sickness it causes can strike people on an airplane, playing video games, or, commonly, when riding in a car. In a future where people may find themselves running around streets in self-driving vehicles, the problems could get worse.
We typically sense our physical position and movement in the world by relying on our eyes, the feeling we get in our body, and our inner ear. Motion sickness may develop when there's disagreement between what your eyes see and what your inner ear senses. If you're looking at your phone in a moving vehicle, your eyes see a stationary screen but your inner ear feels that you're moving. The result of that dissonance can cause sickness. The common-sense solution is to just stop looking at your phone, but some of the appeal of self-driving cars is that you could use the time to be productive or entertained by what's on a screen.
Researchers of a car-making company and a video game company have been studying ways to address these issues. And their solution uses an interesting medium: sound. The research had two goals: to explore if sound could help relieve motion sickness, and to help people trust self-driving cars more. They experimented with two different categories of sound: tips that tell passengers what's about to happen, and noises that alert passengers when the device has noticed something, like a pedestrian.
The most convincing experiment took place on a closed airport runway in Sweden, near Gothenburg, in August of last year. On that track, brave participants had to ride in the backseat of a car driven by a human and read from a tablet while the car navigated the course. With just 20 people, the study was small, but according to researchers, the presence of sound tips made people report that they felt less ill. Participants said the sounds helped prepare them physically, or adjust their bodies for what was about to happen.
1. When does motion sickness usually happen?| A．Sleeping during travels. | B．Closing eyes on vehicles. |
| C．Driving vehicles speedily. | D．Riding in moving vehicles. |
| A．Confusion. | B．Potentiality. | C．Randomness. | D．Disagreement. |
| A．Uncertain. | B．Optimistic. | C．Concerned. | D．Dissatisfaction. |
| A．A study of motion sickness. | B．Self-driving vehicles. |
| C．A convincing experiment. | D．The cause and handling of motion sickness. |
6 . You should see the photo. I'm sitting in red dirt, wearing an ugly purple T-shirt. My hair is wet with sweat. Flies buzz around my head. I'm on a school trip with 20 parents and 20 kids.
It was an odd choice for a holiday. I like sitting by the pool with a cola, not flies and frogs. I like being alone and quiet, not a busload of kids. I like freshly washed sheets, not dry-looking blankets.
But here's the thing about that photo: I am smiling!
The trip sounded good when I signed up. Guides would take us into the heart of the place, and I would see a new part of Australia, learn about local culture and bond with my youngest daughter. I would also bond with 40 strangers.
In Darwin, we got onto a bus. The kids were loud and I hated making small talk. But later, when I looked out at the vast, empty land, I was surprised at and moved by its beauty. At a national park, we enjoyed a natural swimming hole. Kids and parents had a great time. Then we got to the outback. The cabin(小屋) I shared with my daughter was a brick cell, full of geckos and crickets, but too dark to see them. On our last night, a water pipe broke. We awoke to a mess. Usually, I would have complained and asked for a refund, but it just seemed normal to be dirty It didn't matter. Indeed, it was impossible to say clean. We were hiking in red dirt with temperatures of 35 degree. Sill, I felt a kind of energy I hadn't experienced in years.
I love that photo of me in the dirt. I look messy, but also happy. Sometimes, it's another way of traveling .There is beautiful scenery .There is dirt. There is always someone to talk to, someone to laugh with.
1. What were the author's usual trips like according to the article ?| A．Cheap. | B．Adventurous. | C．Comfortable. | D．Crowded. |
| A．Their living conditions were fairly poor during the whole trip. |
| B．Their journey was relaxing without too much sightseeing. |
| C．The scenery on the trip disappointed them to some degree. |
| D．The parents seemed to enjoy themselves more than their children. |
| A．Impatient. | B．Delighted. | C．. Disappointed. | D．Exhausted. |
| A．It's important to choose your trip wisely. | B．It's beneficial to travel with your children. |
| C．It's worthwhile to step out of your usual experience. | D．It's advantageous to travel different places. |
7 . Wildlife has been greatly threatened in the modern age. There are species that are disappearing every day. The white-naped crane is a typical example. So scientists are trying their best to save the species from going out of existence.
Chris and Tim work at a zoo, helping endangered cranes with — their reproduction. Emma, a female crane, has been in their care since she arrived in 2004.
Born at an international crane foundation, Emma was raised by human caretakers. This led to an unexpected consequence, though she had a wonderful time there. Emma had never taken herself as a crane and become attached to humans. She refused to live with male cranes, and even had a reputation for killing some of them, which made it impossible for her to become a mother.
However, the two zookeepers didn't want to see the extinction of this precious species. With their patience and efforts, they successfully developed a combination of artificial breeding and natural reproduction. This enabled Emma to give birth to five baby cranes.
The two keepers are proud of their productive work. But before they can be assured, more efforts must be made, because the population of the crane in the wild is on the decline, and many other species appear headed toward extinction. After all, not everyone has realized that wildlife has thoughts, feelings, and most importantly, equal rights to survive.
How can we bridge the ever-widening gap that separates us from other animals? Chris and Tim offered us the answer: human beings took it for granted that their brains held all the solutions, but maybe their hearts can be a better guide.
1. Which one is not true about Emma?| A．She was an endangered crane. | B．She was cared for by Chris and Tim in 2005. |
| C．She was unwilling to live with male cranes. | D．She was famous for protecting male cranes. |
| A．Had an affection for humans. | B．Become popular with humans. |
| C．Become familiar with humans. | D．Become concerned about humans. |
| A．Artificial breeding. | B．Natural reproduction. |
| C．Zookeepers’ patience and efforts. | D．Combining artificial breeding with natural reproduction. |
| A．Human beings are absolutely more powerful than animals. |
| B．No one has realized animals' equal rights to survive. |
| C．Two keepers have confirmed their success in protecting the crane from extinction. |
| D．People's love and efforts may help narrow the gap between them and animals. |
8 . In the long history of humans, women’s stories have often been overlooked. Yet as modern society has allowed women to speak for themselves, more and more women are standing up to choose how to live their lives. Here are five powerful films that just might inspire you to re-imagine what it means to be a woman.
Hi, Mom (2021)
Directed by Chinese comedian Jia Ling, this heartwarming comedy, about a woman who accidentally meets her mother during time travel, became a hit with audiences this year, leading the mainland box office right after Chinese New Year.
Leap (2020)
This 2020 film about the Chinese national women’s volleyball team presents their history from 1981, when they won the Women’s World Cup, to the year 2016. Actress Gong Li stars as the legendary volleyball player Lang Ping, and Peter Chen from Hong Kong is the director.
Coco Avant Chanel (2009)
The life of Coco Chanel serves as a guide to all women wishing to establish their own careers. Audrey Tautou, famous for her iconic performance in Amelie, stars as the glorious French fashion designer. It is French director Anne Fontaine’s most famous film.
The Joy Luck Club (1993)
Based on the novel The Joy Luck Club, Chinese director Wang Ying tells the stories of four Chinese women and their daughters who were all born and lived in the US. Their conflicts also reflect the collision between traditional Chinese culture and American culture.
The Story of Qiu Ju (1992)
Directed by Zhang Yimou, the 1992 film describes a peasant woman Qiu Ju who lives in a rural area of China and fights for justice. It is a screen adaptation of writer Chen Yuanbin’s novel The Wan Family’s Lawsuit.
1. Why does the author select the above 5 movies?| A．To arouse attention to women. |
| B．To speak highly of great mothers. |
| C．To support women’s fight for equal rights. |
| D．To introduce the history of women movies. |
| A．It inspired a lot of women. |
| B．It is set in a foreign country. |
| C．Its actress became world-famous for her role. |
| D．Its director has a different culture background. |
| A．Hi, Mom | B．Leap |
| C．The Joy Luck Club | D．The Story of Qiu Ju |
9 . If our kids don’t fall, they don’t learn to get up. I still remember the day in high school that my mom forgot to pick me up from school. I’m the oldest of four children, and no doubt she’d had a long day with the other kids and it’d slipped her mind. After waiting at school for an hour, I walked the three miles home, and when I got to my house, I shut our front door with anger, stormed into the kitchen and screamed in my mom’s face that she’d forgotten me.
Later that night, my dad told me I no longer had a ride to school the next day. I figured my mom would still take me, but when the morning came, she refused. It was midterm, and as a straight-A student ready to start college applications, being late wasn’t an option (选择). In my mind, missing these tests would have been the end of my academic career. I begged my mom. I told her she was ruining my future and everything I’d worked for. But she held her ground, and that day, I walked to school. And I missed my tests.
My mom didn’t rescue me from failure. She let me suffer from it. She let me figure it out. She let me learn. Now, as a mom myself, I’ve realized that I want my kids to experience failure because failure is how we grow, learn and think outside of ourselves. It’s how we self-educate to learn what’s right and respectable, and what’s not. It’s how we become responsible and enthusiastic. Falling down makes us better because we learn how to get up.
1. What is one of the reasons that the author got angry that day?| A．She was tired. | B．She failed in a test. |
| C．She was late for school. | D．She had to walk home by herself. |
| A．Terrible. | B．Meaningful. | C．Embarrassing. | D．Colorful. |
| A．gave in to me | B．said yes to me |
| C．stayed in the place | D．kept to her idea |
| A．My Way of Growing | B．The Value of Failure |
| C．My Love for Mother | D．Failure in My Life |
10 . On paper, hydrogen（H2）looks like a dream fuel. Coal, oil, and natural gas produce carbon dioxide, which warms the earth when burned, Hydrogen produces pure water. Hydrogen packs more energy into less space than a battery（but certainly less than petrol）. Also, empty tanks（燃料箱）can be refilled with hydrogen much faster than refilling empty batteries with electricity.
While in practice, things are trickier. Storing a meaningful amount of hydrogen gas requires pressing it several hundred-fold. Changing it into the liquid form is another option, but it should be cooled to-253C. Both processes require a heavy and strong tank. While a 700 bar tank is acceptable for a city bus or a truck, adapting it for use in small vehicles is very difficult because the pressure during refilling would be too great.
The solution? Powerpaste.
A German team of researchers, led by Marcus Vogt, have come up with an interesting "powerpaste", which can store hydrogen energy at atmospheric pressure, ready for release when needed. It is so named because it comes in tubes and looks like toothpaste（牙膏）, not in its traditional form of gas.
The main ingredient（原料）of the paste is magnesium hydride, a substance that reacts with water to form hydrogen. The escaped hydrogen can then be directed into a fuel cell, where it reacts with oxygen from the air to produce electric power.
Refueling is very simple, as instead of going to a filling station, drivers and riders can simply replace an empty tube with a new one and refill the water tank.
Given that powerpaste only begins to break down at temperatures of around 250℃ it remains safe even when a vehicle stands in the baking sun for hours.
However, we will have to be patient. Just because researchers have succeeded in developing a new fueling way does not mean that we can expect to see such vehicles on the road anytime soon. It will indeed be several years before this concept is turned into reality.
1. As a fuel, what is the advantage of hydrogen over oil?| A．Refilling empty tanks will be more convenient. |
| B．It is less likely to worsen global warming |
| C．More energy can be packed in the same space. |
| D．It will produce pure water for people to drink. |
| A．The practical difficulties to use hydrogen as fuel in small vehicles. |
| B．The detailed processes of adapting a strong tank in small vehicles. |
| C．The differences in fueling between large vehicles and small ones. |
| D．The tricks of building strong tanks in small vehicles. |
| A．inexpensive | B．powerful | C．convenient | D．environment-friendly |
| A．Powerpaste-driven vehicles sometimes move very slowly on the road. |
| B．Practical use of powerpaste-driven vehicles will not come very soon. |
| C．Powerpaste-driven vehicles can only work after being in the sun for hours |
| D．It will be years before the researchers work out the concept of powerpaste. |
