1 . This year's hottest destination is Mars. On 23 July, China launched the Tianwen-1 mission to the Red Planet — one of three spacecrafts' planning to head there in 2020. This is China's second interplanetary mission, but the first that the nation has launched on its own. The other, Phobos-Grunt, was a cooperation with Russia that didn't make it out of Earth's orbit after blasting off in 2011.
The new mission, called Tianwen, translated as "questions to heaven" — consists of an orbiter, a lander and a rover, the last of which will be named via a public competition. "It's very ambitious because it's a four-part mission: there's the launch, getting into orbit, the landing and the rover, and every single step has to go right, says space consultant Laura Forczyk. All those steps must work on the first try, an achievement no other space program me has accomplished on a Mars mission because of the difficulty of landing there.
If all goes well, Tianwen-1 will arrive at Mars in February 2021 and the lander and rover will touch down two or three months later. They will take pictures from the surface, measure the soil composition, make radar observations of the planet's underground structure and observe Mars's magnetic field. Due to the harsh environment on Mars, the rover is expected to last about 90 Martian days. It weighs around 240 kilograms, about the same as China's Yutu-2 rover, which is currently roaming the moon. "The Chinese mission to the far side of the moon has been hugely successful, so they are building on that success now," says Forczyk.
The orbiter, which will relay data from the lander and rover back to scientists on Earth, also carries a suite of scientific instruments. It has two cameras and a spectrometer (光谱仪), which it will use to create a map of the mineral composition of Mars's surface, as well as radar and detectors to examine particles in the Martian atmosphere. It will also look for deposits of water ice that could be helpful for future explorers.
Tianwen-1 won't be alone in Mars orbit. The United Arab Emirates has just launched its first mission to Mars, and NASA's Perseverance rover is set to launch on 30 July. These missions are all leaving now because Mars is at its closest point to Earth, which happens once every two years.
1. Which statement is true according to the first two paragraphs?| A．On 23 July, three countries launched space crafts to Mars. |
| B．Every step of Tianwen mission can be completed at several attempts. |
| C．The mission, Phobos-Grunt, cooperated with Russia was a great success. |
| D．Tianwen mission shows the pioneering efforts of China's space exploration. |
| A．Travelling around. | B．Floating past. | C．Wandering aimlessly. | D．Moving swiftly. |
| A．act as a detector to examine particles on the earth |
| B．search for a substance useful for future exploration |
| C．send information back to the earth collected from Mars |
| D．identify the position of minerals possibly lying on Mars |
| A．China's Successful Space Explorations |
| B．China Launching Missions to Mars |
| C．Tianwen, the First Interplanetary Mission |
| D．Mars, the Hottest Destination to Explore |
2 . Tears well up in people's eyes for a lot of reasons. A teardrop running down the cheek is the ultimate symbol of sadness, but people may also cry because they just cut an onion, or maybe they're trying to blink out an eyelash.
For the most part, tears help maintain healthy eyes. When you blink, basal (基底的) tears clean and smooth the eyes, which helps you to see clearly, according to the American Academy of Ophthalmology. Moreover, reflex (反射性的) tears, or those that happen unconsciously, help clear the eyes of irritants (刺激物), including dust and the gas that's produced when a knife slices a raw onion, said Andre Silva, a doctoral student of psychology at the University of Minho in Portugal.
Emotions can also bring about tears in humans. These emotional tears can serve as a means of nonverbal communication. Silva said, “Babies cry to signal to their mothers that something's up. It's a pure attention call. Some people think that babies are capable of controlling adults by crying, but that idea is false and misleading, as a baby is not conscious of being tricky: In a way, we can consider these tears as being somewhere between basal tears and emotional tears.”
As people grow older, they begin to use their tears to express emotions, such as happiness or sadness. These tears may promote compassion and empathy in others. But beware of people who may use their tears to control others. “Some sensitive people may be easily controlled through the crying of others, and may easily shed tears that can also be used by others to control them,” he said.
So, emotional tears have both advantages and disadvantages. “They are a powerful communication device and a powerful manipulative (操纵别人的) device,” Silva said. Crying also makes it hard for some people to mask their feelings when they're in the middle of an extreme emotional state.
1. What's the function of reflex tears?| A．Reflecting our feelings. |
| B．Being used to affect others. |
| C．Serving as a means of interaction. |
| D．Clearing away harmful matters in the eyes. |
| A．Tears are usually used to pity others. |
| B．Babies burst into tears without tricks. |
| C．People mask their feelings when crying. |
| D．Blinking out an eyelash makes it easy to cry. |
| A．We ought to identify tears. |
| B．We should control babies, crying. |
| C．We need to smooth our eyes by emotional tears. |
| D．We can hardly fan others' sympathy by tears. |
| A．Why do people cry? |
| B．Why can tears control others? |
| C．How do people express emotions? |
| D．How can people make use of tears? |
3 . I'm always surprised when I hear the stats (统计数据) about how little time kids spend outside. One study found children are spending less than half the amount of time outdoors than they did just 20 years ago. Meanwhile, the Kaiser Family Foundation found that kids spend an average of seven hours a day using electronic media.
My own childhood was filled with outdoor time. I built forts in the woods, rode my bike with friends, went ice skating in the winter, climbed trees and rocks, and read books on a platform in a tree on hot days.
But my nature time wasn't limited to after-school and weekend activities. I attended a public school in New York's Hudson Valley, and we spent almost all our gym outside. We spent science classes on the acres that surrounded our school, collecting samples from trees and learning about everything from chemistry to physics.
All that outside time isn't just about health and getting kids to exercise more. Several studies also have linked outside time to higher test scores, lower anxiety and aggression, more creativity and improved attention spans.
A public school in Vermont, is taking these results seriously. Eliza Minnucci’s kindergarten class there engages in Forest Mondays, during which the students spend the whole day in the woods, rain or shine.
Minnucci said that playing outdoors involves plenty of learning. It’s fairly easy to weave lessons into nature play. Kids wanted to know the names of birds, plants, rocks and clouds. We followed streams into larger streams into larger streams into a pond and created bridges with logs and stones. We even made up stories about ants and butterfly. For the older kids, we had more defined lesson plans, but we were still outside the whole time, and we would often go off on a tangent(转向)if something interesting was happening, so the learning experience was always fresh and engaging. Besides learning and moving around freely instead of sitting at desks, the kids were having fun while they learned, which made them excited for the next lesson.
1. Why does the author mention little outdoor time kids spend at the beginning of the passage?| A．To make the official data known. |
| B．To focus on children s mind and body. |
| C．To introduce the topic for the passage. |
| D．To explain the reason for little outdoor time. |
| A．Bad for kids, attention. |
| B．Harmful to kids, anxiety. |
| C．Doubtful of kids' test scores. |
| D．Beneficial to kids’ mind and body. |
| A．Physics and teamwork. |
| B．Chemistry and investigation. |
| C．Biology and geology. |
| D．Language and creativity. |
| A．Kids Get Creative in Playing Outdoors |
| B．Why Outdoor Education for Kids Matters |
| C．Learning Outdoors Is the Goal of Education |
| D．Outdoor Lessons Involve Kids' Learning |
4 . The transatlantic car carrier, Oceanbird, is being designed by Wallenius Marine, a Swedish shipbuilder,with support from the Swedish government.
With a capacity(容量) of 7,000 vehicles, the 650 foot-long vessel will have a similar size to ordinary car carriers, but it will look totally different. The ship will have five “wing sails”, with each being 260 feet tall. These sails are capable of turning 360 degrees, and it can be shortened to 195 feet in order to pass under bridges or withstand rough weather.
Although the general theory of wing sails is not new, designing the Oceanbird’s sails has been a challenge, says Mikael Razola, the research project manager for Oceanbird. “That’s because these are the tallest sails that have ever been constructed. The top of the sails will be more than 100 meters above the water surface. At such a height, the wind direction and speed change a lot,” says Razola.
To better understand the atmospheric conditions(大气条件) at this height, Wallenius put sensors on top of its existing vessels to gather data of wind. “All of this information has helped us make the most of the power available in the wind and design an efficient wing vessel,” says Razola.
With its special sails, Oceanbird will outperform conventional car carriers in the aspect of exhaust emission. Nowadays, the shipping industry is under pressure to reduce emissions of CO2 and other greenhouse gases. According to the International Maritime Organization, the UN body that regulates global shipping, shipping accounted for 2. 89% of global manmade greenhouse gas emissions in 2018. And in the same year, this organization introduced a mandatory( 强 制 的 ) 50% reduction of total annual greenhouse gas emissions by 2050. Oceanbird is designed to exceed(超过) the target---Wallenious said the ship would emit 90% less CO2 than other car carriers.
With a stop speed of about 10 knots, Oceanbird will be slower than standard car carriers, which can travel at 17 knots. It will take around 12 days, instead of the standard seven to cross the Atlantic. “This long journey will require some scheduling changes as well as acceptance from carmakers,” said Razola. “But the response so far has been very positive. ”
Researchers in Wallenious have built a 7-meter model of Oceanbird which will sail in Stockholm’s archipelago to gather data that will help finalize the ship’s design. “It will take around three years to launch the full-size version. Our ambition is to see Oceanbird sailing in 2024,” Razola said.
1. What is Paragraph 2 mainly about?| A．The design of Oceanbird. |
| B．The capacity of Oceanbird. |
| C．The operating method of wing sails. |
| D．The sailing conditions for car carriers. |
| A．The lack of financial support. | B．The lack of previous theories. |
| C．The wind conditions at different heights. | D．The tough weather on the Atlantic Ocean. |
| A．Increase the sailing speed. |
| B．Arrange a scientific sailing schedule. |
| C．Handle the conflicts between carmakers. |
| D．Use standard ships instead of Oceanbird |
| A．Giant and inconvenient. |
| B．Low-cost but inefficient. |
| C．High-capacity and high-speed. |
| D．Well-designed and environment-friendly. |
5 . When you're struggling to finish a term paper, preparing a big presentation or studying for final exams, sleep might be the first thing you sacrifice so you have time to get all the work done. To make up for it , you might start drinking coffee to help you study late into the night. But there's bad news if you're trying to keep that kind of schedule for more than a couple of days.
"We were particularly surprised that the performance advantage invested by two daily 200-milligram doses (剂量)of caffeine was lost after lack of sleep for three nights, " lead author Tracy Jill Doty said in a statement. "These results are important, because caffeine is widely used to deal with performance decline following periods of lack of sleep. The data from this study suggests that the same effective daily dose of caffeine is unable to prevent performance decline over many days of lack of sleep. "
The sample size was very small (48 people), so we can't think everyone will respond the same way. Those 48 people slept five hours per night for five nights straight. They got a caffeine dose equal to a large cup of coffee around 8 am and another around 12 pm each day. For the first two days, the people who got caffeine were performing better on attention and reaction tests. But by the third day, the caffeine was no longer helping them perform any better than the people who didn't get any caffeine.
Increasing the caffeine dose may have changed that. "But the more caffeine you consume, the more negative side affects you feel," Doty said. "This work goes along with lots of other work showing that the negative effects of lacking sleep are difficult to overcome. This is true even with a heavy daily dose of caffeine.
1. Who will be the intended reader of the text?| A．Educators. | B．Students. |
| C．Adults. | D．Officials. |
| A．By listing examples. |
| B．By reasoning. |
| C．By analyzing results |
| D．By arguing |
| A．Caffeine fails to perform better over an extended time. |
| B．Increasing caffeine can promote one's performance. |
| C．Drinking too much coffee might lead to sleep loss. |
| D．Caffeine doesn't prevent performance decline at all. |
| A．Coffee: Sleep Loss. |
| B．Coffee: Performance Increase. |
| C．Enough Sleep Makes Coffee Work. |
| D．The More Coffee, the Worse Effects. |
6 . Maeve Higgins once set herself a task. The Irish-born comedian wanted to see what life would be like if she stopped laughing at things that weren’t funny. Turns out it wasn’t as easy as she thought. “It was so hard,” she says. “ Laughter is a lubricant (润滑油) and is expected, and it’s really hard not to do it.”
Higgins suggests there’s something particularly special about being part of the shared experience that is live comedy — that curious magic that occurs when people come together specifically to laugh.
Comedy is more than just a pleasant way to pass an evening, humour more than something to amuse. They’re interwoven into our everyday existence. Whether you’re sharing an amusing story at a party or telling a dark joke at a funeral, humour is everywhere. But what is it for? And can humour, as comedy, change how we feel, what we think or even what we do?
As an essential part of human interaction, humour has been on the minds of thinkers for centuries. One of the most enduring theories of humour was put forward by the philosopher Thomas Hobbes. It asserts that humour appears to make fun of the weak and exert superiority. While this is clearly the function of some comedy, it’s far from a complete explanation for the overall purpose of humour.
For some comedians, it’s not just about getting laughs — it’s about changing what we think and maybe even what we do. If there’s one comic who is really typical of this, it’s Josie Long. A social justice activist and a comedian, Long has a reputation for delightful, optimistic humour and storytelling.
As her career has evolved, she has consciously put social and political topics at the heart of her act. She believes that comedians have a role to play in challenging some of the most pressing issues of the day.
British comic Stephen K Amos sells out venues seating thousands, year in, year out. Amos firmly believes that when comics consciously deal with pressing or controversial （有争议的）social issues like racism, they can reach people on a much more meaningful level than that achieved by briefly lifting someone’s mood. And while it may be difficult to quantify, he says, the social and psychological impact of comedy deserves much greater recognition.
The research backs this up. Although the role of comedy is to be entertaining first and foremost, Sharon Lockyer, a sociologist who studies humour, has identified a number of possible other functions. These include challenging stereotypes (刻板印象).
Amos’s work frequently settles the issues of race by challenging stereotypes.”I don’t do things for shock value,” he says. “ I do stuff that matters to me. In the old days it was just about doing jokes. We’ve moved on — people are talking about things that matter. ”
1. What do the first two paragraphs mainly talk about?| A．The benefits of laughing. |
| B．What a comedian’s daily work is about. |
| C．Why Maeve Higgins chose to be a comedian. |
| D．Maeve Higgins’ understanding of the appeal of comedy. |
| A．Protect the weak from the evil. |
| B．Encourage people to be stronger. |
| C．Be determined to improve oneself. |
| D．Show you are better than other people. |
| A．By gradually influencing people’s attitudes. |
| B．By urging politicians to try and solve the issues. |
| C．By quickly yet thoroughly changing people’s thinking. |
| D．By calling on the whole society to pay attention to the issues. |
| A．getting people to laugh |
| B．promoting social progress |
| C．influencing people’s ideas |
| D．making people more productive |
7 . Researchers at CU Boulder have developed a wearable device that changes the human body into a biological battery. The device is stretchy(弹性的) enough that you can wear it like a ring, sport band or any other thing that touches your skin. It also taps into a person's natural heat-employing thermoelectric generators to change the body's internal temperature into electricity. "In the future, we want to be able to power your wearable electronics without having to include a battery," said Jianliang Xiao, an associate professor at CU Boulder.
The concept may sound like something out of The Matrix film series, in which a race of robots have enslaved humans to harvest their precious organic energy. Xiao and his colleagues aren't that ambitious: Their devices can generate about 1 volt (伏特) of energy for every square centimeter of skin space-less volt per area than what most existing batteries provide but still enough to power electronics like watches or fitness trackers.
Scientists have previously experimented with similar wearable devices, but Xiao's is stretchy, can heal itself when damaged and is fully recyclable-making it a cleaner alternative to traditional electronics. "Whenever you use a battery, you're depleting(消耗) that battery and will, eventually, need to replace it," Xiao said. "The nice thing about our device is that you can wear it, and it provides you with constant power."
Just pretend that you're out for a jog. As you exercise, your body heats up, and that heat will radiate out to the cool air around you. Xiao's device captures that flow of energy rather than let it go to waste. "The thermoelectric generators are in close contact with the human body, and they can use the heat that would normally be sent into the environment," Xiao said.
1. What does Xiao expect of his device at present?| A．It will be used for medical purposes. |
| B．It will be made smaller and wearable. |
| C．It will change natural power into electricity. |
| D．It will supply constant power to wearable devices. |
| A．To give an explanation. | B．To make a comparison. |
| C．To introduce a topic. | D．To analyze the cause. |
| A．The strengths of Xiao's device. |
| B．The convenience of using a battery. |
| C．The replacement of wearable devices. |
| D．The development of traditional electronics. |
| A．It operates with plenty of power. |
| B．It is designed for practical use. |
| C．It benefits people's health in a way. |
| D．It's based on traditional electronics. |
8 . The traditional working day doesn't benefit night owls(夜猫子),with people who prefer to stay up late twice as likely to underperform at work as early birds ;a new study from Finland has6uggested.
Early risers tend to work better early in the morning, while evening types are the opposite. The researchers asked 5,881 individuals born in 1966 in northern Finland about their working life and health and questioned them about their sleep patterns in 2012 when they were 46 years old. The study participants were monitored over a period of four years.
Ten percent of the men and 12% of the women were "evening types", 72% of whom worked in day jobs,the researchers found. A quarter of people classified as evening types rated their own performance at work as poor. This was a significantly higher proportion(比例) than among early birds.
"If evening types have to work in the early morning, they won't rate their work ability as high as morning types. The opposite would be true as well. If normal business hours were 3 p.m. to 11 p.m., the early morning types would feel worse than evening types," said Kristen Knutson, an associate professor at Northwestern University.
Suzanne Hood, an associate professor at Bishop's University in Qucbec, Canada, said that night owls shouldn't be alarmed by the findings.
"Rating job performance doesn't necessarily tell you about the quality of the work in real terms," noted Hood. "Also, the study was observational—it doesn't mean that being a night owl makes you less able to work."
"For example, the employee who seems like a slow starter in the morning might be the person who's most able to work effectively into the evening to meet an important deadline," said Hood. "If there is some opportunity for flexibility in scheduling, allowing employees some control over what time of day they complete their work may help to optimize(优化) performance and productivity."
1. What do we learn about the study from Finland?| A．It lasted from 1966 to 2012. |
| B．It was conducted mainly in the lab. |
| C．72% of participants were early birds. |
| D．A minority of participants were night owls. |
| A．Objective. | B．Worried. |
| C．Supportive. | D．Unconcerned. |
| A．Starting early in the morning. |
| B．Choosing different work schedules. |
| C．Following normal business hours. |
| D．Finishing one's work later than usual. |
| A．Night Owls Tend To Perform Badly At Work |
| B．Early Birds Are More Likely To Gain Advantages |
| C．Are You A Night Owl? Blame It On Your Genes |
| D．Which Do You Prefer, Morning Type Or Evening Type? |
9 . It would be easy to believe that Mother’s Day was created by a greeting card company. After all, the day is celebrated with special sales and brunches, lots of presents and massive advertising campaigns. But the day was actually conceived more than a century ago by Anna Jarvis of West Virginia as a way of honoring the sacrifices mothers made for their children.
Jarvis’s mother, Ann Reeves Jarvis, helped start “Mothers’ Day Work Clubs,” teaching women how to care for their children. During the Civil War, she organized “Mothers’ Friendship Day,” where mothers of Union and Confederate soldiers met to try to promote harmony. The younger Jarvis Was inspired by all the things her mother had accomplished with her social work.
When Jarvis was young, she overheard her mother praying, “I hope and pray that someone, sometime, will find a memorial mother’s day honoring her for the matchless service she offers to humanity in every field of life.” When her mom died in 1905, Jarvis looked through all the sympathy cards she received. She underlined all the kind words that praised her mother, reading them over and over. The outpouring of kindness for her mother inspired her to create a day to honor all mothers.
The white carnation was her mother’s favorite flower, so it became the symbol for the day. She said it symbolized the truth, purity and charity of a mother’s love. Her idea of celebrating Mother’s Day was wearing a carnation while visiting your mother or maybe going to church together. Children were also encouraged to write letters to their mothers, sharing the depths of their appreciation.
The first official Mother’s Day events were held on May 10. 1908, at the church where her mother taught Sunday School in Grafton, West Virginia, and at the Wanamaker’s department store auditorium（礼堂）in Philadelphia. Jarvis didn’t attend the event in Grafton, but she sent 500 white carnations.
1. What is the probable meaning of the underlined word “conceived” in paragraph 1?| A．Thought up | B．Figured out. |
| C．Found out. | D．Believed in. |
| A．She created Mother’s Day. | B．She was active in social work. |
| C．She joined in the American Civil War. | D．She taught Jarvis how to care for children. |
| A．Pray for their mother’s happiness. | B．Send some flowers to their mothers. |
| C．Write a letter to thank their mothers. | D．Accompany their mothers to the celebration. |
| A．A Memorable Mother | B．Carnation and Mother’s Day |
| C．The Greatness of a Mother | D．The Founding of Mother’s Day |
10 . One of Britain' s most outstanding scientists says the growth in the use of electronic tablets and smart phones is causing people to spend so much time indoors that they need to take regular vitamin D supplements to make up for the lack of sunlight they receive naturally.
Geneticist Steve Jones said he himself was a follower to the cause and urged others to follow. “I never thought I would be a person who would take vitamin supplements；I always thought it was absolute nonsense. But now I take vitamin D every day. Today, because I knew the sun wasn't going to shine, I took an extra one,” he said.
Exposure to the sun is the major source of vitamin D. However, people are spending less and less time outdoors in many areas. The problem is particularly serious in Scotland. "The Scots are the whitest people in the world because their entire body systems are crying out for vitamin D," he said, adding that life expectancy in Scotland is two years shorter than in England or Wales. Multiple sclerosis (多发性硬化症), a medical condition which is often seen in northern Europe, is also higher in Scotland than in England.
Vitamin D helps with the absorption of Ca, which helps keep bones strong. And Jones said the fact that rickets (佝偻病) was making a comeback in Britain after nearly 50 years was another sign of how changing behavior patterns were bringing physical harm.
Jones admitted that concerns over the damaging effects on skin of long-time exposure to the sun were reasonable, but said sunlight was healthy and necessary for the human body, and could help in lowering blood pressure. "If you lie on the beach for an hour, you will drop your blood pressure by about 10 points, because it relaxes your blood vessels (血管). So, get out in the sun while we still can," he said.
1. How are people affected by the rise of technology according to the text?| A．They are more sensitive to sunlight |
| B．They take more vitamin D supplements. |
| C．They get less vitamin D than before. |
| D．They become addicted to electronic games. |
| A．Skeptical. | B．Cautious. |
| C．Worried. | D．Supportive. |
| A．Because they are in great need of sunlight. |
| B．Because their blood pressure is very low. |
| C．Because they enjoy a short period of sunshine. |
| D．Because they are easy to get multiple sclerosis. |
| A．Get out and gain more Vitamin D |
| B．Keep away from tablets and phones |
| C．Pay attention to the importance of sunlight |
| D．Take vitamin D supplements to keep healthy |
