1 . Summer is the swimming season. As fun as a swimming pool can be, it’s also a major safety risk if you don’t take the appropriate precautions (预防措施). Here are some tips for a safe swimming season.
Keep a variety of flotation devices in and around the pool like a life jacket plus pool noodles or a paddle board. That helps when accidents happen.
Supervisors should also learn basic CPR.
The steps are:
1. Place the person on his back and gently lift his chin and tilt (倾斜) his head back.
2. Place one hand over the other, place them over the patient’s breastbone and administer 30 chest presses.
3. Pinch their nose and place your mouth tightly over their mouth and administer two short breaths
Start again until the patient starts breathing.
Another risk is a condition called “dry drowning”. This happens after a near-drowning event in which water gets into someone’s lungs.
| A．Drowning can happen in an instant |
| B．Adults should watch over the safety |
| C．Drowning isn’t the only danger with pools |
| D．Pool owners should be sure to have a fence around their pool |
| E．Call for help and start administering CPR as quickly as possible |
| F．A drowning person having something to grab can get out of the pool quickly |
| G．That means the airway is closed off and can’t provide someone with enough oxygen |
2 . Love is one of life’s greatest motivators. That is exactly what inspired Zack to design a fully electric off-road wheelchair for his girlfriend suffering from paralysis (瘫痪).
Like most wheelchair-users, Cambry has always been restricted to the pavement for most of her adult life. Aside from that, using a wheelchair across long distances makes her shoulders ache. Zack Nelson, her boyfriend, wanted to give her the ability to explore more places conveniently, so he made a special wheelchair for her, which would make it possible.
Zack began by combining two electric bikes and installing a seat in the centre. It worked! Cambry experienced a whole new level of freedom using her new “ride”, and she couldn’t be more grateful to Zack for coming up with it. Fast forward to a year later, Cambry and Zack tied the knot. They also began mass-production of the special wheelchair. Throughout that time, they improved the original design to make it a more reliable off-roader.
While similar vehicles already exist in the market, they said they’re either slow or cost as much as a car. Cambry and Zack wanted to build something quick, light, super long-range, and affordable at the same time. However, coming up with that kind of electric off-roader wasn’t easy.
The toughest challenge when developing the special wheelchair is the price. “We wanted to create something that is affordable for everyone. Finding quality components, and a simple enough design at the cheapest price possibly took quite a bit of time,” said Zack. “But I think we have something now that everyone will be able to enjoy, at a fraction (少量) of the cost of other ‘off-road wheelchairs’ currently on the market.” Another great thing about the vehicle is that it’s silent. Its rider will have no difficulty chatting with their companion while using it. Cambry and Zack are very happy with the fully-electric machine, and they hope that other wheelchair-users will also benefit from it.
1. What was Zack’s motivation to invent a fully electric wheelchair?| A．The market demands. | B．His interest in invention. |
| C．His love for his girlfriend. | D．The request of his girlfriend. |
| A．Walking on the pavement with ease. |
| B．The special wheelchair made by Zack. |
| C．The ability to explore more places conveniently. |
| D．Cambry’s desire to reduce the pain of her shoulders. |
| A．They’re light. | B．They’re expensive. |
| C．They’re ugly. | D．They’re small. |
| A．He has an ambition to introduce the wheelchair to others. |
| B．He is satisfied with people’s reaction to the wheelchair. |
| C．He couldn’t afford the components of the wheelchair. |
| D．He spent many years designing the wheelchair. |
3 . Whether you want to broaden your horizons, entertain the family or are simply looking for something to do on a rainy day, a trip to a free museum might be just the ticket.
Science Museum
At the Science Museum, you can enjoy award-winning exhibitions and collections spanning the sciences. From Helen Sharman’s iconic space suit to Amy Johnson’s Gipsy Moth airplane, explore the extraordinary stories of human achievements and the challenges we have overcome. You can book your free admission ticket on its website.
Natural History Museum
London’s world-famous museum is home to over 80 million objects and specimens including plants, creatures, dinosaur fossils, rare bugs and more. Billions of years of natural history is all open to visitors, completely free of charge. You can even get up close to collections made by Charles Darwin.
Discovery Museum
The Discovery Museum offers a great selection of exhibits to the whole family. Here you can stand in awe at the world’s first steam turbine-powered ship Turbinia which stands proud in the central hall. It also offers educational workshops and also provides a wealth of online content for virtual learning opportunities. The museum is free of charge.
Victoria and Albert Museum (V&A)
For art and design lovers, the Victoria and Albert Museum is the perfect free-to-visit attraction in Britain’s capital. Named after Prince Albert and Queen Victoria, who laid the building’s foundation stone in 1899, the V&A has an impressive collection of original masterpieces, contemporary art, architectural marvels and even a fantastic fashion gallery.
As well as dozens of free permanent exhibitions available in-house and online, the V&A also hosts temporary collections and events throughout the year, many of which are also completely free!
1. What can visitors do at the Science Museum?| A．Explore the world’s first ship. |
| B．Enjoy some contemporary art. |
| C．Admire Charles Darwin’s collections. |
| D．Learn about the great people and their achievements. |
| A．Science Museum. | B．Natural History Museum. |
| C．Discovery Museum. | D．Victoria and Albert Museum. |
| A．They offer free visits. | B．They are world-famous. |
| C．They show diverse ships. | D．They are in the same city. |
4 . In 2013, Alie Ward’s life was falling apart. In quick succession, her relationship with her partner ended; her dad was diagnosed with a rare form of cancer; and she was feeling increasingly unhappy in her job.
Ward lived in Los Angeles at the time. To distract herself from her sadness, she liked to find and take pictures of her unconventional obsession (痴迷) : bugs. Sometimes, if she found a beetle or a bee that she particularly liked, she’d post it to social media. Those posts attracted the attention of a woman named Lil a Higgins, who worked as an entomologist at the local natural history museum. After seeing Ward’s pictures, Higgins reached out to her to see if she would want a tour of the museum’s insectary (昆虫饲养研究室).
“For most people in the middle of a really terrible year, question like ‘Do you want to come to see 40 cockroaches (蟑螂) in a fish tank’ is not what most people would say ‘absolutely’ to,” Ward said. “But this is my jam. There was nothing I wanted more than to see some scorpions (蝎子).”
When Higgins led her through the different exhibits in the museum, for the first time in ages, Ward felt herself light up. Higgins noticed her enthusiasm and suggested Ward volunteer at the museum for a few hours every week.
Despite her doubts, Ward decided to sign up. “It gave me this sense of purpose. It helped me reconnect with my love of science and nature that I really put on the back burner to chase those careers that were not really what I like,” said Ward.
Soon, Ward quit her job and started working in science media. She now is the host of a podcast called Ologies. Ward had Higgins on the show as her first guest. “She has caused such an increasing effect in my life. It was really because of her that I was able to reconnect with that part of myself, and do something that I really love,” said Ward.
1. Why did Ward like to take pictures of bugs?| A．To help her get rid of her sadness. | B．To show her interest in bugs. |
| C．To draw inspiration from bugs. | D．To show how beautiful the bugs were. |
| A．Confused. | B．Excited. | C．Curious. | D．Worried. |
| A．Ward wanted to chase her career as a host. |
| B．Ward was unwilling to accept the job as a volunteer. |
| C．Ward didn’t show much interest in her previous job. |
| D．Ward accepted the volunteer work without hesitation. |
| A．A Special Passion for Bugs | B．An Unexpected Invitation |
| C．An Appreciation to a Stranger | D．A Positive Attitude Towards Life |
5 . Songbirds do have a perfect voice. Every species of bird wakes up at a very particular time in the morning and begins to sing. This is because each species has its own specific waking stimulus (刺激), which is linked to the brightness of the sunlight.
Like human beings have to learn to speak, birds also have to learn how to sing. They do this in several stages. First, they practise voices and sounds, which is comparable to the early stage in human language development. During the second stage, the birds practise their songs for eight to nine months, until memory and practice match up. The singing is strengthened during the final stage.
Although nightingales got their name as a result of their singing at night, not all nightingales sing at night. Generally, both males and females sing during the day. The night song is used mainly for seeking partners. After succeeding in attracting a female, the male nightingale falls silent and doesn't start his song again until the early morning.
Birds are seasonal singers. We only hear numerous kinds of bird concerts between spring and high summer. This is the time when birds are looking for partners, and when the males aim to impress the females with their song and mark out their territory at the same time. However, even after they have found a partner, male birds continue to sing, because this is the time when they are showing their offspring (幼崽) how to sing.
Birds don’t all sing as well as others, not even within a species. The song of a bird in London will be quite different from that of a bird in Paris or Berlin. Although the members of each bird species share a vocabulary of sounds, dialect differences are quite common. The individual dialects are not natural but are learnt while the birds are children that adopt the dialect of their parents. The young birds always sing as well or as badly as their teachers, because the adults on whom they model themselves vary in style and talent from region to region.
1. What role does the brightness of sunlight play in birds’ singing?| A．It makes them learn songs easily. |
| B．It affects where they hold concerts. |
| C．It leads them to find abundant food. |
| D．It determines when they begin to sing. |
| A．To mark its territory | B．To teach its offspring |
| C．To draw female’s attention | D．To drive enemies away |
| A．After they leave their homes | B．Before they find partners |
| C．When they are still young | D．When they become grown-up |
| A．The varieties of Birdsong |
| B．The science of Birds’ singing |
| C．The living environment of Birds |
| D．The dialects of Bird Communication |
6 . When Alex Lin was 11 years old, he read an alarming article in the newspaper about e-waste. The article said that people were throwing away their e-waste in places it should never go. This was dangerous, the article said, because e-waste contains poisonous chemicals and metals like lead. These harmful substances (物质) can leak into the environment, getting into crops, animals, water supplies — and people.
Alex showed the article to a few of his classmates. They were worried too. But what could they do about this problem with e-waste? How would they even start? “The first thing we did,” Alex says, “was to learn more about the problem.” Alex and his friends spent several weeks gathering information about the chemicals in e-waste and their effects on humans. They learned how to dispose (处理) of e-waste properly and how it could be recycled. “Then,” he says, “we had to find out what the situation was in our town. So we sent out a survey.”
What they found shocked them: Of the people who answered the survey, only one in eight even knew what e-waste was, let alone how to properly dispose of it. Alex and his friends went into action. They advertised in the local newspaper and distributed notices to students, asking residents to bring their unwanted electronics to the school parking lot. The drive lasted two days, and they collected over 21,000 pounds of e-waste.
The next step was to set up an e-waste drop-off center for the town and to find a responsible company to recycle the waste. That was when Alex and his friends learned another scary fact about e-waste — some irresponsible recycling companies don’t break down the e-waste and dispose of it safely themselves. Instead, they ship it overseas to countries such as China and Nigeria, where local environmental laws are not applied. “We checked carefully online to make sure the company we chose didn’t do this,” Alex says.
Because of the work of people like Alex and his team, more and more people are getting the message about safe disposal of e-waste. As Alex says, “Today’s technology should not become tomorrow’s poisonous trash.”
1. What can we learn about Alex from paragraph 1 and paragraph 2?| A．He was curious about chemistry experiments. |
| B．He possessed a strong sense of responsibility. |
| C．He set out to solve the problem individually. |
| D．He formed the habit of reading newspapers. |
| A．Campaign. | B．Imagination. | C．Performance. | D．Technology. |
| A．Lack of available space was the reason for shipping. |
| B．Recycling was totally banned in their own country. |
| C．They were running their companies on a tight budget. |
| D．They were not charged with insecurely disposing it. |
| A．Reusing School Computers | B．Recycling Electronic Waste |
| C．Meeting a challenge | D．Doing Scientific Experiment |
7 . People who give, live longer, studies have shown. Now, a new study by University of Michigan shows that why people volunteer—not whether they volunteer—is what really counts.
For the study, Konrath and colleagues analyzed data collected in 2008 and 2012 aiming at the same random samples of 3,376 people. Overall, they found that just 2.3 percent of those who once worked as volunteers had died, compared to 4.3 percent of non-volunteers. They further found that how much people volunteered mattered as well—only 1.8 percent of regular volunteers died, compared with 2.5 percent of occasional volunteers.
But what really made a difference were people’s motives for volunteering. The researchers asked people to rate how important they found various reasons for volunteering, and they found that the more important people rated reasons such as feeling pity for people in need, the more likely they were to be alive. Those who rated motives related to personal benefit as more important were more likely to have died, and just as likely to die as those who didn’t volunteer at all. These reasons included volunteering because they enjoyed the social contact, to escape their own problems, or to explore their own strengths.
Konrath says the current findings suggest it may be a poor idea to encourage people to volunteer because it’s good for them. “Volunteering is increasingly being encouraged in schools and organizations. Some groups say that it’s okay to want benefits for yourself, and encourage people to think of volunteering as an exchange for personal interests. Some groups emphasize the health benefits received through volunteering.” Konrath added, “Of course, it’s reasonable for volunteers to expect benefits for themselves. But the potential health benefits of volunteering are significantly reduced if self-benefit becomes a person’s main motive.”
1. What does the new study mainly find?| A．How we volunteer makes sense to others. | B．How often we volunteer makes a difference. |
| C．Whether we volunteer decides our well-being. | D．Why we volunteer has an impact on our health. |
| A．By analyzing statistics. | B．By rating volunteers’ performances. |
| C．By doing lab experiments. | D．By grouping participants randomly. |
| A．To develop abilities. | B．To make more friends. |
| C．To help the poor people. | D．To solve personal problems. |
| A．Practical suggestions on further studies. | B．A further explanation of the current findings. |
| C．Potential applications of the research method. | D．A reasonable doubt about the research results. |
8 . Atomic shapes are so simple that they can’t be broken down any further. Mathematicians are trying to turn to artificial intelligence (AI) for help to build a periodic table of these shapes, hoping it will assist in finding yet-unknown atomic shapes.
Tom Coates at Imperial College London and his colleagues are working to classify atomic shapes known as Fano varieties, which are so simple that they can’t be broken down into smaller components. Just as chemists arranged element s in the periodic table by their atomic weight and group to reveal new insights, the researchers hope that organizing these atomic shapes by their various properties will help in understanding them.
The team has given each atomic shape a sequence of numbers based on its features such as the number of holes it has or the extent to which it bends around itself. This acts as a bar code (条形码) to identify it. Coates and his colleagues have now created an AI that can predict certain properties of these shapes from their bar code numbers alone, with an accuracy of 98 percent.
The team member Alexander Kasprzyk at the University of Nottingham, UK, says that the AI has let the team organize atomic shapes in a way that begins to follow the periodic table, so that when you read from left to right, or up and down, there seem to be general patterns in the geometry (几何) of the shapes.
Graham Nib lo at the University of Southampton, UK, stresses that humans will still need to understand the results provided by AI and create proofs of these ideas. “AI has definitely got unbelievable abilities. But in the same way that telescopes (望远镜) don’t put astronomers out of work, AI doesn’t put mathematicians out of work,” he says. “It just gives us new backing that allows us to explore parts of the mathematical landscape that are out of reach.”
The team hopes to improve the model to the point where missing spaces in its periodic table could point to the existence of unknown shapes.
1. What is the purpose of building a periodic table of shapes?| A．To gain deeper insights into the atomic shapes. |
| B．To create an AI to predict the unknown shapes. |
| C．To break down atomic shapes into smaller parts. |
| D．To arrange chemical elements in the periodic table. |
| A．Its holes. | B．Its bends. |
| C．Its atomic weight. | D．Its properties. |
| A．Design. | B．Help. | C．Duty. | D．Threat. |
| A．Thanks to AI, new atomic shapes have been discovered. |
| B．Mathematicians turn to AI to create more atomic shapes. |
| C．AI helps build a relationship between chemistry and maths. |
| D．A periodic table of shapes can be built with the help of AI. |
9 . Research has found that using wood for construction instead of concrete and steel can reduce emissions. But Tim Searchinger at Princeton University says many of these studies are based on the false foundation that harvesting wood is carbon neutral (碳中和). “Only a small percentage of the wood gets into a timber (木料) product, and a part of that gets into a timber product that can replace concrete and steel in a building,” he says. Efficiencies vary in different countries, but large amounts of a harvested tree are left to be divided into parts, used in short-lived products like paper or burned for energy, all of which generate emissions.
In a report for the World Resources Institute, Searchinger and his colleagues have modelled how using more wood for construction would affect emissions between 2010 and 2050, accounting for the emissions from harvesting the wood. They considered various types of forests and parts of wood going towards construction. They also factored in the emissions savings from replacing concrete and steel.
Under some circumstances, the researchers found significant emissions reductions. But each case required what they considered an unrealistically high portion of the wood going towards construction, as well as rapid growth only seen in warmer places, like Brazil. In general, they found a large increase in global demand for wood would probably lead to rising emissions for decades. Accounting for emissions in this way, the researchers reported in a related paper that increasing forest harvests between 2010 and 2050 would add emissions equal to roughly 10 percent of total annual emissions.
Ali Amiri at Aalto University in Finland says the report’s conclusions about emissions from rising demand are probably correct, but the story is different for wood we already harvest. “Boosting the efficiency of current harvests and using more wood for longer-lived purposes than paper would cut emissions,” he says. “We cannot just say we should stop using wood.”
1. What is wrong with previous researches according to Searchinger?| A．They got wrong statistics. | B．They used an incorrect concept. |
| C．They included too many factors. | D．They were applied in limited countries. |
| A．The process of the new research. | B．The background of the new study. |
| C．The challenge of the new research. | D．The achievements of the new study. |
| A．When wood grows slowly. |
| B．When wood is largely used to make paper. |
| C．When wood is largely used in construction in countries like Brazil. |
| D．When wood is largely harvested in countries like Brazil. |
| A．Favorable. | B．Doubtful. | C．Critical. | D．Objective. |
10 . Animals being extinct from the Earth is a serious issue. When this happens in order to use their fur or skin for fashion, it is even worse, since it’s not even for a matter of human survival. That’s why a London zoo decided to make a powerful statement at the Siamese crocodile enclosure (鳄鱼围栏).
When visitors come in expecting to see a crocodile, they’re greeted with the handbag instead, making a very effective and powerful point about illegal wildlife trade and the harm it takes on the species involved.
A sign by the enclosure reads, “This bag used to be found swimming in slow-moving rivers and streams across Southeast Asia and Indonesia. Over the last 75 years, more than 80% of Siamese crocodiles have disappeared. Many, like this one, were hunted for their skins as part of the illegal wildlife trade.”.
Native to parts of Southeast Asia, Siamese crocodiles are critically endangered and have become virtually extinct in the wild. Due to hunting as well as habitat loss, they are now absent from nearly 99% of their original range. A huge part of the decline of population is due to humans using their wetland habitat for rice farming, and things only took a turn for the worse when large-scale hunting for their skin for commercial purposes began in the 1950s.
The particular handbag that is on display at the zoo was confiscated at a UK airport, according to Benjamin Tapley, leader of reptiles and amphibians at ZSL London Zoo.
Tapley told The Huffington Post, “We made this exhibit, within ZSL London Zoo’s Reptile House, to draw visitors’ attention to the destructive impact the Illegal Wildlife Trade (IWT) is having on species around the world. At ZSL, we are working globally with governments and local communities to protect wildlife, support law enforcement (执法) that targets illegal trade networks, empower local communities affected by IWT and reduce demand for threatened wildlife.”
1. Why does the sign say this handbag used to swim?| A．It is made of a crocodile’s skin. |
| B．It is made into a crocodile shape. |
| C．It is light enough to float on water. |
| D．It was kept in flowing river at first. |
| A．Wildly hunting of Siamese crocodiles. |
| B．Destruction of Siamese crocodiles’ habitats. |
| C．Commercial value of Siamese crocodiles. |
| D．Causes to make Siamese crocodiles endangered. |
| A．Seized. | B．Sold. | C．Found. | D．Stolen. |
| A．The importance of wildlife protection. |
| B．The crisis endangered animals are facing. |
| C．The purpose to show the handbag. |
| D．The harm IWT caused. |
