1 . Israeli researchers say they have created the world's first three-dimensional, or 3D-printed heart using a patient's own cells. They described the experiment as "a major medical breakthrough." Tal Dvir, the lead researcher on the project, said in a statement that it was the first time that human cells had been used with 3D printing technology to successfully create a whole heart. Dvir added that the "printed" heart contains blood vessels which are needed to pump blood. The development marks a step forward for 3D printing in the medical field.
The researchers took samples of fatty tissue from patients. This material was then used to develop “ink” for the 3D printing process. First, the researchers created patches of tissue from the patient’s own cells. Later, they used that same process to create a small version of a whole heart. Using the patient’s own cells is important to reduce the risk that the body’s system to fight infection will reject a transplanted organ.
The goal, the researchers said, is to treat heart disease. The World Health Organization reports that heart disease is by far the leading cause of death worldwide. For patients with severe heart disease, a heart transplant is currently the main treatment available. The researchers hope their invention can help ease the demand for heart transplant donors.
Dvir says that the newly-created heart represents great progress. However, more research and development is needed to produce a fully operating, transplantable organ. One of the biggest challenges for the engineering team will be finding a way to create a human-sized heart.
Dvir said his team planned to transplant heart models designed for animals, possibly within the next year. He added that, for human use, “simpler organs” will likely be produced before hearts. “Maybe, in ten years, there will be organ printers in the finest hospitals around the world,” Dvir said. He hopes such methods will be used “routinely” to produce organs in the future.
1. Why should patients’ own cells be used to create a 3D heart?| A．To avoid being rejected. | B．To make it suitable to print. |
| C．To fight infection. | D．To build up immune system. |
| A．To adopt printing technology. | B．To create human organs. |
| C．To treat heart disease. | D．To develop organ printers. |
| A．They will be developed to create organs routinely. |
| B．They will be widely used to treat different diseases. |
| C．They will be used to transplant organs for animals. |
| D．They will be applied to various fields in the world. |
| A．An artificial heart. | B．A major medical breakthrough |
| C．A scientific project | D．A great research team. |
2 . With the infection being brought under control, more and more galleries and museums are reopening. While many museums have been putting exhibitions online, visitors still prefer to enjoy works of art in person. Here are four major art exhibitions that are held offline.
The Palace Museum (Dec. 10—Feb. 15)
The exhibition, Everlasting Splendor which is being held in the Meridian Gate Galleries, marks the 600th anniversary of China’s imperial palace. Over 400 cultural relics are displayed at the exhibition, reflecting the history of the Forbidden City’s construction, the development of its layout, and how it has been protected and restored in the past decades.
The National Museum of China (Jan. 4—Mar. 29)
The exhibition, A Sail Over Miles, offers a brief review of the ancient Silk Road in ceramics (陶瓷). It guides visitors through the manufacturing, export and shipping routes from the Tang Dynasty to the Qing Dynasty with over 300 ceramic relies, including a pot dug from Nanhai No 1, a Chinese cargo ship dating back more than 800 years. The exhibition also shows Japanese, Korean and British ceramics, reflecting the influence of China’s porcelain-making techniques in local industries.
The Capital Museum (Jan. 1—Mar. 30)
The Capital Museum is to host Man of Infinite Refinement: Special Exhibition on the Paintings and Calligraphy of Su Shi, a calligraphy and painting exhibition on the legacy of Su Shi, an iconic figure of ancient Chinese literature and fine arts. The 78 exhibits on display spans from the Northern Song Dynasty through recent history and cover a range of media, including calligraphy, paintings, documents and rarely seen books.
The National Art Museum of China (Nov. 30—Feb. 10)
On show are nearly 300 objects, including paintings, calligraphy works, carved seals, manuscripts, letters and books. Donation of Rong Geng not only reflects his academic accumulation over the years, but forms the basis for his becoming such a well-rounded scholar in the area of Chinese cultural traditions.
Rong Geng (1894—1983), a scholar of Chinese paleography, educator and connoisseur of antiquities, is little known to the general public. However, his extensive studies of ancient Chinese writings and his former collection of archaic oracle bones and bronzes continue to enrich people’s cultural life. In his lifetime, Rong donated to the State nearly 200 bronze objects, all of which are now housed at numerous public museums and universities.
1. Which offline exhibition lasts the shortest period of showtime?| A．Everlasting Splendor. | B．A Sail Over Miles. |
| C．Man of Infinite Refinement. | D．Donation of Rong Geng. |
| A．The National Museum of China. | B．The Palace Museum. |
| C．The National Art Museum of China. | D．The Capital Museum. |
| A．Visitors can only appreciate Ancient Chinese ceramic relics at the National Museum of China. |
| B．Donation of Rong Geng exhibits nearly 300 objects which were once donated by Rong Geng. |
| C．All the exhibits on display at the Capital Museum were created by Su Shi himself. |
| D．Everlasting Splendor displays over 400 cultural relics that have a history of 600 years. |
3 . The company SpaceX has already launched hundreds of its Star-link satellites, with plans to put as many as 42,000 of them in Earth orbit. Its goal is to provide high-speed Internet to billions of people. Moving toward that kind of access is important, but it comes at a cost. Glittering with reflected sunlight, these first orbiters, sent up in the past year, are brighter than 99 percent of the 5,000 or so other satellites now circling Earth, and obviously there are going to be a lot more. This sudden increase is bad for astronomy: the probability of a Star-link satellite crossing a telescope’s field of view and ruining an observation will be quite high near sunset. For that reason, my fellow astronomers have signed a petition (请愿书) calling for governments to protect the night sky from this invasion.
In response to protests, SpaceX has promised to address the visibility problem by, for example, applying experimental coatings — essentially painting the satellites black — but the company’s aggressive launch schedule remains unchanged. And the satellites’ illuminated (被照亮) surfaces are mostly their solar panels — exactly the part that cannot be painted over.
Unfortunately, at present no regulations govern how bright a single satellite can be, let alone thousands of them together. Even if there were such regulations, one nation’s laws can not hinder (阻碍) another country’s launches. Space literally has no borders, and the sky will need to be protected at an international level. As a consequence, we hope that the United Nations will find a way to think outside of the box to save the sky for everyone.
When I was growing up in Montana, it was a game to be the first to find a moving satellite among the host of stars in the night sky. Soon it could be a game to recognize the constellations (星座) behind a swarm of moving points of light.
1. What is the writer’s attitude toward Space X’s launching plans?| A．Indifferent. | B．Doubtful. | C．Optimistic. | D．Disapproving. |
| A．SpaceX plans to send too many Star-line satellites into space. |
| B．The Star-line satellites will possibly ruin an observation near sunset. |
| C．The first orbiters are brighter than most of other satellites circling Earth. |
| D．Space X fails to provide high-speed Internet to people around the world. |
| A．The United States. | B．The United Nations. |
| C．The company SpaceX. | D．Just one nation. |
| A．Preserve the Night Sky | B．Ban Star-line Satellites |
| C．Observe the Stars Attentively | D．Protest against Space X |
4 . To walk is to be human. We' re the only creature that gets around by standing up and putting one foot in front of the other. In the more than 4 million years that humanity' s ancestors have been u-sing only two legs for walking, our ability to walk upright has allowed humankind to travel great distances and survive changing climates, environments and landscapes.
But walking is more than just transportation. It also happens to be really good for us. Countless scientific studies have found that this simple act can provide a number of health benefits and help people live longer. In fact, a walking routine-if done properly-might be the only exercise people need.
How much walking should one aim for? You’ve likely heard we need 10,000 steps a day. That’s about 5 miles. But contrary to popular belief, this recommendation doesn’t come from science. Instead, it stems from a 1960s advertising campaign to promote a pedometer(计步器)in Japan. Perhaps because it's a round number and easy to remember, it stuck.
Since the 1960s, researchers have studied the 10,000 - steps - a - day standard and have turned up mixed results. Although 10,000 steps is certainly a healthy and worthwhile goal, it’s not a one - size - fits - all recommendation.
For instance, a recent Harvard University study involving more than 16,000 senior women found that those who got at least 4,400 steps a day greatly reduced their risk of dying early when compared with less active women. The study also noted that these benefits continued up to 7, 500 steps before leveling off. This 7,500 mark isn't surprising: It’s in line with common public health recommendations, such as the Centers for Disease Control and Prevention’s recommendation of 150 minutes of moderate (适度的) physical activity a week for adults.
Research has shown that picking up the pace might be a good idea, too-fast enough to raise your heart rate, even if just for a short burst.
1. Which statement will the author believe?| A．Walking 10000 steps a day fits us all who lack exercise. |
| B．Walking is the only exercise that unhealthy people need. |
| C．To be healthy, walking great distances is strongly suggested |
| D．The benefits of walking depend on frequency, intensity and duration |
| A．A walking routine | B．A round number |
| C．The popular belief | D．The pedometer Ads. |
| A．4,400 steps a day. | B．7,500 steps a day. |
| C．10,000 steps a day. | D．150 minutes a day. |
| A．The Only Exercise You Need-Walking |
| B．10,000 - Step Goal Is More Marketing Than Science |
| C．Walking Is One Of The Best Exercises For Health |
| D．Walk Often, Walk Fast And Walk Long |
5 . It's good to share, right? Growing up as kids we are told to share our toys and not be selfish. We also live in an age where discussing our feelings is encouraged. But when does it all become too much? With new fashion trending all the time, such as dance challenges and wearing a pillow as a dress, the question is: when can sharing become oversharing on social media?
What is oversharing? The term has become associated with social media, but it doesn't only belong to this platform. Imagine you head to a party and you meet someone. Within five minutes they have given away details about their personal life. While some of us may try to escape these people, according to marriage therapist Carolyn Cole, this form of oversharing could come from a strong desire to connect with someone. But how does this translate to social media?
Dr. Christopher Hand, a lecturer in internet psychology, says the more details people disclose, the less sympathy we express when things go wrong. This could be due to a belief that we attract our own negative experiences the more we share them. It seems that the idea of searching for sympathy by oversharing, is generally viewed as negative rather than the cry for help it could actually be.
However, Dr Hand's research also seems to suggest that the more positive posts we share on a platform, the more socially attractive we become. Even back in 2015, Gwendolyn Seidman PhD, said that we should avoid complaining and being negative online. We are supposed not to show off, as it's now known—especially about our love lives. It makes sense—if your date is going 'that well', would you really have time to share a photo with text?
So, how can you know if you are oversharing? Well, why not ask your friends in real life. They would probably be more than happy to tell you if your posts about your breakfast or your complaint about your lack of money really are too much.
1. Why do some people try to overshare at parties?| A．Because they want to catch others' attention. |
| B．Because they just want to show off something. |
| C．Because they have a strong desire to pour out their emotions. |
| D．Because they may expect to make a connection with someone. |
| A．explore | B．expose | C．display | D．discuss |
| A．We will become more socially attractive if we post more on a platform. |
| B．We tend to show sympathy when things go wrong. |
| C．We may be considered negative when seeking for sympathy by oversharing. |
| D．We can show off something positive especially about our love lives. |
| A．To inform. | B．To inspire. | C．To advertise. | D．To condemn. |
6 . Wearing a hearing aid can slow the progress of dementia (痴呆) by up to 75 percent, according to a new study. Scientists believe that keeping older people active by adopting the devices can significantly reduce age-related cognitive (认知的) decline.
They followed the progress of 2,040 people between 1996 and 2014, asking them to complete word memory tests at various stages and monitoring the rate of decline before and after getting a hearing aid. The research team found that while the aids did not halt cognitive decline, they slowed it down by three-quarters. Meanwhile, in a separate group of 2,068 who underwent cataract surgery (白内障手术), decline slowed by around half.
The team at the University of Manchester said the strength of the connection between hearing aids, cataract surgery and mental decline meant policy makers should consider hearing and sight loss screening for all older adults. Dr. Piers Dawes said, “These studies underline just how important it is to overcome the barriers which stop people from accessing hearing and visual aids. It’s not really certain why hearing and visual problems have an effect on cognitive decline, but I’d guess that separation, shame and the resultant lack of physical activity that are linked to hearing and vision problems might have something to do with it.” “And there are barriers to overcome —people might not want to wear hearing aids because of embarrassment attached to wearing them, or they feel the amplification (放大) is not good enough or they’re not comfortable.”
The number of people in Britain suffering hearing problems will rise by 40 percent by 2035, a charity has forecast. The charity Action on Hearing Loss believes the number of people suffering such difficulties will rise from one in six to one in five, so it calls for more investment in treatment and research into hearing loss.
1. How does wearing hearing aids benefit old people?| A．It improves their cognitive ability. |
| B．It slows down their cognitive decline. |
| C．It enables them to make more friends. |
| D．It helps them overcome life barriers easily. |
| A．The result of the research. |
| B．The principle of the research. |
| C．The importance of the research. |
| D．The participants of the research. |
| A．Increase. | B．Stop. |
| C．Change. | D．Help. |
| A．Provide hearing aids for people freely. |
| B．Spend more on research into hearing loss. |
| C．Screen all old people for hearing and sight loss. |
| D．Encourage factories to produce good hearing aids. |
7 . Southern Texas is a wonderful spring time destination. The weather is warm and beautiful. During the month of May, visitors will be able to choose from a variety of wonderful festivals and events held throughout the region. Here are some great options for May festivals in southern Texas.
Dragonfly Days, Weslaco
Insect enthusiasts should stop in Weslaco during the month of May. This time of the year is great for sitting dragonflies and damselflies. There are over 100 species in the region. Visitors can learn all about the different species while getting to see them as well
Songwriter’s Showcase Art Festival, Port Aransas
One way to enjoy some of the unique art and culture of Texas is to attend this festival. Visitors can enjoy a grand variety of music. It will be held in the evening at the Tarpon Inn Courtyard and visitors can enjoy the beautiful scenery and the music. Music genres range from Folk to Cajun to Rock.
Blues on the Hill, Harlingen
Blues fans should be sure to visit Harlingen on May 12, 2020. It will be the first event in the summer series held in McKelvey Park. This event offers a variety of Blues artists. Visitors can attend the event for free, and get to enjoy the music while sitting on a blanket of lawn chair in the grass.
Beach to Bay Relay Marathon, Corpus Christi
This event will be held on May 19, 2020. Running enthusiasts visiting Corpus Christi will have a wonderful time. It is a full marathon, 26 miles, but it is a relay event. Six people run the marathon as a group. The route starts on North Pare Island and travels through Corpus Christi.
1. Which festival will you probably choose as a sports lover?| A．Dragonfly Days, Weslaco |
| B．Songwriter’s Showcase Art Festival, Port Aransas |
| C．Blues on the Hill, Harlingen |
| D．Beach to Bay Relay Marathon, Corpus Christi |
| A．Types. | B．Characters. |
| C．Visitors. | D．Artists. |
| A．A diary. | B．A guidebook. |
| C．A novel. | D．A magazine. |
8 . When young, I loved going on trail（小路） runs. It was my favorite way to escape stress. So, when I was back in my hometown after a tough first year of my Ph. D. program, I thought a trail run was just what I needed. But instead of helping me relax, the run did just the opposite.
After I moved to the city for college, where my runs were on flat concrete paths instead of winding dirt trails, I used a GPS watch. When I went on trail runs again in the country, it constantly reminded me of the fact that I wasn’t keeping up with my usual pace. I turned my watch off, thinking that would allow me to enjoy my surroundings and find the peace I expected, but I worried I was underperforming. “Why can’ t I let go and just enjoy myself?” I wondered. But after some introspection（反省）, I realized why I was struggling—both on trail runs and in graduate school.
Going into my Ph. D. , I had thought that my solid undergraduate track record would set me up for instant success. To my surprise, I was wrong. I lacked confidence in my research abilities which I thought stopped me performing well and I constantly felt my progress was too slow. Other students’ self-confidence and their excellent results made me feel insecure. Finally, one day I broke down in tears in my adviser’ s office.
Then came my visit home: I was having trouble because I hadn’ t properly adjusted my expectations to the differences between an urban run and a trail run.
A Ph. D. is like a trail run: Sometimes you can run fast. Sometimes you might find yourself climbing up a steep, winding trail at a snail’ s pace. And that’ s OK. Barriers are unavoidable, and success looks and feels different on a challenging trail than it does on a smooth, flat path. Sometimes it’ s best to take a deep breath and do your best to meet the challenge.
1. How did the author feel when he was on trail runs again?| A．Relaxed. | B．Tired. |
| C．Anxious. | D．Happy. |
| A．His lack of confidence. | B．His lack of hard work. |
| C．His poor research abilities. | D．His poor track record. |
| A．His desire for success. | B．His confidence of trail runs. |
| C．His expectations in his study. | D．His realization after the trail run. |
| A．Failure is the mother of success. |
| B．Working out regularly is beneficial. |
| C．It’ s important to make necessary adjustments. |
| D．It’ s vital to turn to others for help. |
9 . Devon Gallagher, a college graduate from Philadelphia, wants the world to know exactly where she’s been while she’s on her worldwide vacation in a special way. The traveler, who was born with a bone disease, had her right leg amputated (截肢) at the age of four. Although the amputation caused inconvenience for Gallagher early on, she now sees it as nothing short of inspiration for living her best life.
To spread that message. Gallagher has gone to social media, where she shares photos of her travels across the world, but instead of simply using a geo-tag(地理位置标签), she writes her location on her artificial leg before taking a picture.
Now she has been taking pictures across the Continent, which show her cycling over the canal in Amsterdam relaxing on a wall overlooking the city of Barcelona, posing with a waffle in Brussels, taking in the beautiful Parthenon temple in Athens and enjoying a river ride in Budapest, all with the well-known locations written on her artificial leg.
“I get a new leg every two years and I can choose the design on it. One day I had a sudden thought to get a chalk-board,” Gallagher said. “My mum and grandmother didn’t like the idea, but my friends thought it was great and told me to go for it, so I did.”
Gallagher said people often stare when she’s writing on her leg, but once she shares the photos, she receives only positive feedback(反馈), “My leg hasn’t stopped me from doing anything I’ve wanted to do,” she said. “I don’t know if it’s my determination to prove to myself that I can do it, anyway, I’ve been able to keep up with people at my age and lead a pretty great life.”
Gallagher shows us that you should never let anything stand in the way of your dreams. And if life gives you an artificial leg, make art.
1. What message did Gallapher want to spread in her special way?| A．She enjoys her travelling across the globe. |
| B．She suffers little from her leg’s amputation. |
| C．she looks on her misfortune as another form of blessing. |
| D．She has exactly fallen in love with posting photos online. |
| A．the continent | B．the pictures | C．the leg | D．the location |
| A．helpful and ambitious | B．friendly and generous |
| C．determined and creative | D．independent and sensible |
| A．Never Too Late to share | B．A Special Artificial Leg |
| C．An Outstanding Photographer | D．Gallagher’s Summer Holidays |
10 . Here’s a selection of festivals for tourists to the United States in summer.
San Francisco Silent Film Festival
Films at this odd cinematic event have a variety of musical accompaniments, including piano and violin. It includes some classic silent movies. If you want to see them all, you can buy a festival pass.
May 29 to June 1; www.silent film.org
Union Street Festival
This popular street fair stretches out over six blocks of the city, in the fashionable shopping area of Union Street. This year, there’s beer, wine, biscuits tasting and more separate themes-fashion, cuisine, tech, local, craft, and health and fitness.
June 7 to 10; www.unionstreetfestival.com
North Beach Festival
This is San Francisco’s oldest street party, with live entertainment, delicious food and arts and crafts. Situated in the Little Italy district, known for its associations with the “Beat Generation”, festival goers are guaranteed plenty of good Italian food. There is also as the “blessing of the animals”, a San Francisco tradition which takes place at the National Shrine of Saint Francis of Assisi (610 Vallejo Street) at 2 pm on both days of the festival.
June 14 to 16; www.sfnorthbeach.org
Stern Grove Festival
This is the oldest free summer arts festival of its kind in the United States. It includes a wide variety of acts, from the local symphony orchestra to well known artists such as Smokey Robinson.
Sundays from June 22 to Aug 24; www.stemgrove.org
1. Which of the following festivals contains the most themes?| A．Union Street Festival. | B．San Francisco Silent Film Festival. |
| C．North Beach Festival. | D．Stem Grove Festival. |
| A．Festival goers can enjoy food in it. | B．It lasts the shortest time. |
| C．It has the longest history of food. | D．Some foreign culture is presented in it. |
| A．Saturdays in July. | B．Saturdays in May. |
| C．Sundays in May. | D．Sundays in July. |
