Washing windows on a skyscraper is a dirty job. Hanging off the side of a building can also be dangerous, notes Oliver Nicholls, 19. So this 12th-grader invented a robot to handle the job.
Some recent incidents inspired his project. In one, a couple of high-rise window washers were standing on a platform that fell down. No one died, but the pair was seriously injured. Oliver also witnessed someone fall and break his leg while cleaning a glass awning (雨篷) over the entrance to a building.
The new robot is about the size of a medium-sized picnic cooler and weighs 12 to15 kilograms. It's designed to hang off the side of a building from ropes, just as current window-washing platforms do. A hose(软管)carries water to the robot. A cable (电缆) delivers it electric power. The computer controls the robot up-and-down movements by adjusting the ropes from which the robot hangs. When the robot needs to move from one window to another, a set of propellers(螺旋桨) starts to work. They push the robot a short distance away from the building, while the ropes slide along a railing(栏杆)to carry the robot over to the next window. Then, as a different set of propellers holds the robot tight against the window, the cleaning cycle repeats. Oliver tested his robot by cleaning sample windows he'd built in his backyard. The robot’s propellers can hold the robot against a building even in winds as high as 45 kilometers per hour, the teen reports. He performed those tests using his family’s leaf blower.
Besides limiting the chance of injury, this window-washing robot could save building owners a bit of money. If commercialized, Oliver estimates it would cost about $11,000. That's about the same cost as hiring a crew to clean a 7-story building. So Oliver suspects his robot might be able to pay for itself after cleaning just one such building.
1. What encouraged Oliver to develop his project?A.His interest in housework. | B.The accidents he experienced. |
C.The high costs of washing windows | D.Risks facing high-rise window washers. |
A.It carries water itself. | B.It is supported by a platform. |
C.It hangs from ropes while working. | D.It can produce power while working. |
A.To record its working speed | B.To see its wind-resistance ability |
C.To test whether it could remove the windows | D.To know if it needed a different set of propellers |
A.It is costly but time-saving. | B.It still has many limitations. |
C.It has huge commercial potential | D.It has become a favorite of building owners |
相似题推荐
【推荐1】Robert Sansone, the winner of the 2022 George D. Yancopoulos Innovator Award, is a natural born engineer. From robotic hands to high-speed running boots, Sansone has worked on at least sixty engineering projects to date in his spare time. And he’s only 17 years old.
A couple years ago, Sansone came across a video about the advantages and disadvantages of electric cars. It explains that most electric car engines use rare-earth elements, which are costly, both financially and environmentally. In fact, 1kg of the rare-earth materials in question can cost up to several hundred dollars. With that sustainability issue, he wanted to solve it, so he tried and designed a different motor (发动机). His new motor, on the other hand, uses copper, which costs around $8 for 1kg.
The highschooler had heard of a type of electric motor — the Synchronous Reluctance Motor (SRM同步磁阻电动机) — that doesn’t use these rare-earth materials. This kind of motor is currently used for pumps and fans, but it isn’t powerful enough by itself to be used in an electric vehicle. So, Sansone started brainstorming ways he could improve its performance.
For over a year Sansone worked on the motor. It needed to be more efficient and have more rotational (旋转) force. The new motor was made from 3-D printed plastic, copper wires and a steel rotor and tested using a variety of meters to measure power. Sansone is now working on version 16 of his motor, which he plans to build out of stronger materials so he can test it at higher revolutions per minute.
As a rising senior, Sansone has dreamed of attending Massachusetts Institute of Technology (MIT). His winnings from competitions will go toward college tuition. If his motor continues to perform with high speed and efficiency, he says he’ll move forward and cooperate with car companies. He hopes that one day his motor will be the design of choice for electric vehicles.
1. What is the author’s purpose in writing paragraph 2?A.To explain the use of electric car engines. |
B.To stress the cost of the rare-earth materials. |
C.To introduce a video of previous electric cars. |
D.To show Sansone’s inspiration for his new motor. |
A.Its cost. | B.Its size. | C.Its power. | D.Its weight. |
A.He is studying in the MIT. | B.He aims high for his motor. |
C.He has started a motor company. | D.He will enter a new competition. |
A.Gifted and determined. | B.Caring and outgoing. |
C.Humorous and energetic. | D.Generous and hard-working. |
【推荐2】In Japan, there is now a cafe that uses robots to attend to its guests. But that’s not the incredible part! Behind these robot servers are “pilots”, people with disabilities, who control them remotely.
Opened up in 2018, this café was initially meant to operate for just two weeks while its creators raised money for the future of this project. Later, encouraged by all the positive feedback from customers and employees, Ory Laboratory, the company behind this project, decided to open a permanent outpost. This is how, in June 2021, the “Avatar Robot Café DAWN ver. β” opened in Nihonbashi, Tokyo.
The pilots behind the robots are often severely disabled, with conditions like amyotrophic lateral sclerosis(ALS). They can control the robots from wherever they are, be they at home or in hospitals where they may be bedridden or in a wheelchair.
The robots are about four feet tall. Their 14-joint motors allow them to do things like carrying trays and picking up plates and cups. Consequently, they are able to welcome diners, take orders, deliver food and drinks, and even clear tables like regular waitstaff. To enable communication between the pilots and the guests, the robots also have a built-in camera, a microphone, and speakers. Finally, as if these features weren’t already quite impressive, the robots can be controlled through eye movements as well. This then allow seven immobilized people to work at this café.
Undoubtedly, people with severe disabilities are often restricted in their movements. This then poses a huge hurdle in their abilities to be employed or participate in the world. At the same time, other people might find it difficult to commute to work due to responsibilities such as childcare. For all such individuals, Ory Laboratory hopes that their robots can provide novel means of social participation. This way, their robots can give a brand-new meaning to remote working.
1. What’s special about this café?A.Its robot waiters. | B.Its management mode. |
C.Its original founding purpose. | D.Its employees controlling robot waiters. |
A.To develop more branches. |
B.To collect customer feedback. |
C.To raise money for the company’s project. |
D.To provide employment opportunities for the disabled. |
A.The features of the robot waiters. | B.The popularity the robot waiters gain. |
C.The rules robot waiters have to follow. | D.The ways of controlling the robot waiters. |
A.Indifferent. | B.Hopeful. | C.Disappointed. | D.Uncertain. |
【推荐3】Hands-on basketball
The boy was only nine years old when he designed a “hands-on basketball”. Chris Haas had the idea when he saw his friends miss lots of baskets. His basketball has painted hands on it. The hands show you where to put your hands when you throw the ball. Today people use his invention around the world.
Wristies
At age 10, Kathryn Gregory was playing outside one day in the cold. Her wrists (手腕) began to hurt from the cold so she decided to find a way to keep both her hands and wrists warm during the winter. In 1994, she invented Wristies: fuzzy sleeves (毛绒袖子) that can be worn underneath gloves to protect your wrists from the cold. She worked with her mom to get the idea off the ground and now the product is sold worldwide.
Makin’ Bacon
Abbey Fleck was 8 years old when she noticed how much time her parents spent soaking up bacon fat (吸干培根油脂) after cooking. She realized that it might be easier to hang bacon while it cooks. That way you wouldn’t need paper towels and it would even make the bacon healthier. She then worked with her father to design a dish that hangs bacon while it cooks. Now people can see her invention in many supermarkets.
Braille
Louis Braille had an accident when he was three. The accident left him blind. At that time, it was hard for blind children to read. They had to touch raised letters. But it was difficult to tell a Q from an O, an R from a B, and so on. When he was fifteen, Louis invented an alphabet (字母表) that used raised dots. The Braille alphabet was a big success!
1. Whose invention is related to sports?A.Chris Haas’. | B.Kathryn Gregory’s. |
C.Abbey Fleck’s. | D.Louis Braille’s. |
A.It was invented in 1994. |
B.It was named after its inventor. |
C.It helps people eat more healthily. |
D.It reduces the cases of cooking accidents. |
A.They were invented by kids. |
B.They came into being by chance. |
C.They were designed to help others. |
D.They brought wealth to their inventors. |
【推荐1】My friend Lisa has a clothes store. She asks me to come and see. So I go to her store one day.
It’s a small but nice store. Good clothes are everywhere. I see T-shirts, shorts and skirts. All of them are at great sale.
A woman and her son come in. The woman wants to buy a T-shirt for her son. “My son likes black,” says the woman. Lisa finds a black T-shirt for the boy. The boy likes it very much. The woman asks, “How much is it?” “Only $10.” says Lisa. “Oh, it’s really cheap!” Then the woman buys the T-shirt happily.
Another woman comes. She is a teacher. She wants to buy thirty skirts for her students. She needs ten black, eight yellow, seven green and five white ones. Lisa sells the thirty skirts at a great sale. One skirt is only $18.
I help Lisa sell some clothes too. It’s a really great day.
1. How many kinds of clothes does Lisa sell?A.One | B.Two | C.Three | D.Four |
A.ten white skirts | B.eight yellow skirts |
C.seven black skirts | D.five green skirts |
A.$540 | B.$420 | C.$300 | D.$180 |
【推荐2】Modern humans have only been around for some 300,000 years. That's just a flash in earth history. Still, we've left our mark on the planet, We've changed Earth's terrain(地形)and its chemistry. We've also affected the diversity, abundance and biomass(生物量)of many other species.
For example, between 15,000 and 10,000 years ago, half of Earth's large mammal(哺乳动物)species died out. Human activities, such as hunting or destroying habitats, seem to have largely driven that extinction. That's what a 2014 study concluded, at least. It is estimated that over humanity's history, 90 percent of animal biomass has disappeared.
The plant kingdom has taken a similar hit. Its mass has declined by half since humans began wandering the planet. Today, 43 percent of Earth's trees grow in the tropics. But human-caused climate change has been warming the high latitudes faster than the rest of the planet. As a result, more plants can move in and grow there. However, climate change and the cutting down of greenery at tropical sites have made some of those sites drier. So even if more land is warm enough to support trees, the total biomass of trees will fall.
By 2050,earth may host 9.7 billion people. Our human biomass by then still won't outweigh bacteria. But the balance of animals and plants may continue to shift so that we'll have even more livestock and crops and even less wildlife. This means the variety of life on Earth will decline. And that can be bad for the health of habitats.
Biomass studies such as these are one way to project what the future may look like, and how quickly major changes in species or ecosystems may occur. They also help us understand the role people are playing in these changes. That could help us learn what organisms(big or small)most need protecting.
1. What contributed to the distinction of many large mammal species?A.Human activities. | B.Lack of food | C.Natural disasters. | D.Poor adaptation. |
A.90%. | B.50%. | C.43%. | D.60%. |
A.Earth will be too crowded by 2050. | B.Bacteria will take over the world. |
C.Wildlife habitats will be protected. | D.Species will continue to die out. |
A.Climate. | B.Pollution. | C.Science. | D.Education. |
【推荐3】Fiona Kolbinger, a 24-year-old cancer researcher From Germany with little experience in competitive cycling, took the world by surprise when she became the first female to win the Transcontinental Race this year. She surpassed 225 men and 39 women to finish about 2,485 miles’ race from Bulgaria to France in 10 days, two hours, and 48 minutes.
“When I was coming into the race, I never thought I could win the whole race,” Kolbinger said. While the cyclist’s unexpected victory shocked people worldwide, she’s unimpressed. Despite resting an average(平均) of just four hours a night throughout the ten-day period, Kolbinger says, “I think I could have gone harder. I could have slept less.”
Now in its seventh year, the Transcontinental Race was founded by the late British ultra-cyclist Mike Hall. The race requires not only racers’ biking skills and endurance(耐力), but also their route planning and time management skills. “Riders plan, research and lead their own course and choose when, where and if to rest,” the Transcontinental Race’s website explains. “They’ll take only what they can carry and eat only what they can find.”
Unlike other cycling competitions where the routes are carefully laid out, the Transcontinental Race requires riders to make a map of their own course. The only requirement is to check in at four stops, located at different points along the way. To make sure all competitors experience some of the same challenges, each checkpoint is followed by strict terrain(地形).
The event’s difficulty has meant previous winners have all been experienced ultra-cyclists. Given that this was Kolbinger’s first try at endurance racing, her victory shocked many. However, it didn’t surprise Björn Lenhard, who trained with her for the race in Dresden, Germany. The ultra-cyclist said, “Fiona is so strong. What’s more, she’s a complete rider. Yes, you need to be strong, but in this race, you have to be able to think, to plan, to fix your bike if you have to.”
1. What does the underlined word “surpass” in the first paragraph mean?A.Treated. | B.Encouraged. |
C.Helped. | D.Beat. |
A.They have to be experienced. |
B.They have to be smart enough. |
C.They have to be self-supporting. |
D.They have to ride along the given roads. |
A.It requires cyclists to go through at least four terrains. |
B.It requires cyclists to plan courses alone. |
C.It is much fairer than other races. |
D.It needs to be carefully laid out. |
A.It is expected. | B.It is encouraging. |
C.It is shocking. | D.It is rewarding |
【推荐1】Language Engineer Wanted
Are you a linguist(语言学家)with technical skills? Or are you an engineer with a passion for(human)languages? Come work on Alexa! We're building the speech and language solutions behind Amazon Echo and other Amazon products and services. Our goal is to delight our customers by adding new features to Alexa. We also improve our existing speech recognition and natural language processing systems.
Specifically, you will:
●design the natural language processing components of new Alexa experiences and features;
●discover and solve production issues that are impacting the Alexa customer experience;
●work with other language engineers in creating the best solutions to improve customer satisfaction.
Basic qualifications:
●Bachelor's degree in a relevant field
●Experience in computational linguistics(计算语言学), language data processing, etc.
●Experience working with speech and text language data in several languages
●Experience in Python, Perl, or other programming languages
Primary qualifications:
●Advanced degree in a relevant field
●Familiarity with database queries(数据库查询)and data analysis processes
●Experience with statistical language modeling
●Fluency in a language other than English
Application instructions:
Please click "Apply Now" and follow our online application process
Deadline: September 30, 11:59 p.m., Eastern Daylight Time(EDT). We highly recommend that candidates submit résumés up to two weeks in advance of the deadline. Submitting on the deadline day is NOT recommended, and applications received late will not be accepted.
You must submit the name of your résumé in this exact format: LastName_FirstName_CV_Language Engineer
1. What does a language engineer do?A.Build speech and language solutions for Google |
B.Work with linguists to improve customer satisfaction. |
C.Add new features to Alexa to satisfy the customers' needs. |
D.Invent speech recognition and natural language processing systems |
A.One with a bachelor's degree in literature |
B.One familiar with data analysis processes |
C.One fluent in spoken and written English. |
D.One with years' of experience in customer service. |
A.A webpage. | B.A newspaper. |
C.A textbook. | D.A report. |
【推荐2】Walter Peak High Country Farm on the western shores of Lake Wakatipu is famous in history. Its sheltered bays were used as camping sites by Maori travelling to the Mararoa and Oreti Rivers on Moa hunting and gathering expeditions.
Things to do
Situated on picturesque Lake Wakatipu’s western shores, the farm is the perfect place to spend a few relaxing hours. The Farm Tour itself is a wonderful experience for the whole family, with something to keep everyone entertained and happy. Our rural host will meet you after you leave the steamboat and take you for a waking tour of the farmyard. The first stop is the holding to help feed the sheep and deer, and even get up close to the Scottish highland cattle. Then walk slowly through the lakeside gardens to the charming Colonel’s Homestead for morning or afternoon tea. Afterwards the farmer will lead you over to the shearing shed (剪羊毛棚)where you can watch the farm dogs rounding up sheep on the hills, and see the farmer cut the wool off a sheep. You will then board the steamboat for your cruise back to Queenstown.
Ticket Information
Child Ticket $ 22.00
Adult Ticket $ 77.00
Visitor Information
Opening Time:10 a. m.
Closing Time:4 p. m.
Additional Information
All tickets purchased at MyFun must make a booking at+64-3441-8166. Please mention your MyFun barcode(条形码)number when making your booking. Please print out your voucher(收据)and take along with you to the attraction. Tickets are valid for 12 months from the date of purchase.
1. What can tourists do during the Farm Tour?A.Have morning tea. | B.Cut the wool off a sheep. |
C.Hunt on the rivers with your family. | D.Run a steamboat by yourself. |
A.$99. | B.$176. | C.$231. | D.$253. |
A.Use the tickets after a year. |
B.Tell the Farm your MyFun barcode number. |
C.Call +64-3441-8166 to print out your voucher. |
D.They can’t use the tickets unless they have made a booking. |
【推荐3】Are you interested in travelling? Here are famous national parks where travellers mostly like to go in America.
1. Great Smoky Mountains National Park
Visitors: 11,388,893
The name “Great Smoky Mountains” comes from the fog over this mountain range situated along the North Carolina-Tennessee border. Established in 1934, it is not just home to a diverse ecosystem of plants and animals, but also home to rich Appalachian cultures. Visitors there can see over 100 waterfalls, go boating on Fontana Lake and hike the Appalachian Trail. It's also an excellent vantage point to see the leaves change in the fall.
2. Grand Canyon National Park
Visitors: 6,254,238
The Grand Canyon is the result of over 70 million years of geological events creating the Colorado Plateau, glaciers and valleys, while the Colorado River carved its way through the valleys. It is truly a natural splendor!
When President Roosevelt first visited it in 1903, he said, “The Grand Canyon fills me with awe. It is beyond comparison – beyond description.”16 years later, it was signed by President Woodrow Wilson, officially viewing the Grand Canyon a national park.
3. Yosemite National Park
Visitors: 4,336,890
In addition to being a national park, Yosemite is designated as a World Heritage Site. Yosemite National Park is in Central California in the western Sierra Nevada. Though it covers around 1,168 square miles of area, visitors spend most of their time in the 5.9 square-mile area of the Yosemite Valley where there are some most famous sites like Yosemite Falls, and Cook’s Meadow Loop.
4. Zion National Park
Visitors: 4,504,812
Settled in Southwestern Utah is Zion National Park. It has some of the most unique landscapes packed with mountains, valleys, rivers, desert and forests.
Zion National Park is also an important place to study ancient humans who made the area their home about 8,000 years ago. Some of the park’s most notable attractions include Angel's Landing, Kolob Arch, the Narrows, etc.
1. How does Great Smoky Mountains National Park get its name?A.With smoke rising from the volcano in the lake. |
B.With big forest fire breaking out in the mountain. |
C.Signed by President Woodrow Wilson. |
D.With water vapor seen over the mountain range. |
A.In 1887. | B.In 1903. | C.In 1919. | D.In 1934. |
A.They are located in the same state. |
B.People can learn about ancient times there . |
C.They both have the most charming land scenery. |
D.They were both formed as the result of years of geological events. |
【推荐1】YOUR LIST OF "MUST READ."
Of Human Nature and Good Habits: Baby Steps to Follow Mother Nature
Prabhash Karan
Hardback·▏Paperback ▏E-book
$26.99 ▏$18.99 ▏$3. 99
Research claims that keeping only 5 good habits—eat healthy, exercise, drinking moderately, not smoking and keeping a healthy body weight—can not only keep the life thriving through golden years but also make a man's life longer at age 50 by 12 years, and a woman's by 14.
Loving Memories: A collection by B. J. Barkley
B. J. Barkley
Hardback ▏Paperback ▏E-book
$29. 99▏$19. 99▏$3. 99
Author and poet В. J. Barkley invites readers to go on a journey in Loving Memories. This is a collection of mother's experiences expressed through poetry.
It's In The Bible!; A Practical Historical and Sociopolitical Perspective of Scripture Arthur Padilla
Hardback▏Paperback▏E-book
$29.99▏$19.99▏$3.99
It's In The Bible! Takes a practical, approach in describing the significant historical, social, and political influence The Bible has had and is having on human society today.
S413
Saniyah Chisti
Hardback▏Paperback▏E-book
$34.99▏$23.99▏$5.99
After breaking up, Elizabeth falls in love with Sean, the billion law student. In the process of her spiritual awakening, she ends up discovering the secret of the world.
1. Which book may help you live a longer life?A.Of Human Nature and Good Habits | B.Loving Memories |
C.It's In The Bible! | D.S413 |
A.Saniyah Chisti. | B.B. J. Barkley | C.Prabhash Karan | D.Arthur Padilla |
A.$26.99. | B.$23.99. | C.$29.99. | D.$34.99. |
【推荐2】It's school time again! You're probably feeling excited and maybe a little sad for the vacation is over. Some kids feel nervous or a little scared on the first day of school because of all the new things: new teachers, new friends, and maybe even a new school. Luckily, these “new” worries only stick around for a little while. Let's find out more about going back to school.
Most teachers start the school year by introducing themselves and talking about what you'll be doing that year. Some teachers give students a chance to tell something about themselves to the rest of the class.
When teachers do the talking on the first day, they often go over classroom rules so you'll know what's allowed and what's not. Pay close attention so you'll know if you need to raise your hand to ask a question and what the rules are about visiting the restroom.
You might have already known a lot of people in your class on the first day. But it's a great day to make new friends, so try to say “hello” to the kids you know and new ones that you don't. Make the first move and you'll be glad about what you did and so will your new friends!
Most teachers let you pick your own seat on the first day, but by the second or third morning, they'll have mapped out a seating plan. It's a good idea to write down where your seat is in your notebook so you don't forget.
Here are a few final tips for a fantastic (奇异的) first day: Get enough sleep. Have a healthy breakfast. Try your best. Develop good work habits, like writing down your assignments (作业) and handing in your homework on time. Take your time with schoolwork. If you don't understand something, ask the teacher.
1. What can we conclude from the first paragraph?A.All students feel excited about a new term. |
B.All teachers let students pick their seats. |
C.New school worries do not last very long. |
D.Being hard-working helps make new friends. |
A.turn to their teachers | B.write them down |
C.ask their parents | D.help with each other |
A.To offer students some advice on starting a new school term. |
B.To encourage students to work harder in a new school term. |
C.To remind children of the importance of starting school. |
D.To introduce a way to improve students' learning ability. |
【推荐3】Jellyfish are unusual creatures. They’re neither fish nor jelly. Some are among the most colourful creatures in the world, but it’s best to look but not touch these invertebrates(无脊椎动物). Not only are they very fragile creatures, but many give a painful sting, and some are even deadly. Whether you admire them in an aquarium or try to avoid them in the wild, you won’t be able to get these fascinating jellyfish facts out of your head.
Here’s a jellyfish fact that might come in handy: There are several names for a group of jellyfish. They include smack, bloom, and swarm. Choose the word you prefer depending on whether you think the jellyfish pack looks like a garden of blooming flowers or more like a frightening pack of stingers, and whether you’re admiring them at an aquarium or if you and your fellow snorkelers are surrounded.
Jellyfish have two main forms in their life cycle that look quite different from each other. Scientific American explains that an adult jellyfish, called a medusa, has a bell-shaped body with tentacles(触须)flowing down below it. Young jellyfish, called polyps, look more like sea anemones, with shorter tentacles that flow up above the main body. Medusas reproduce by releasing eggs.
Melanie Roberts, Senior Aquarist at SeaWorld Orlando, says that the largest jellyfish in the world is a lion’s mane jellyfish. The body of this beautiful orange jelly can grow up to three feet in diameter. With its 12,000 tentacles that can grow 120 feet long, Oceana.org adds that the lion’s mane jelly compares in size to the planet’s largest animal: the blue whale.
Regardless of their size, jellyfish are mostly made of water. In fact, they’re about 95 per cent water.These creatures don’t have brains, blood, or bones. And most jellyfish don’t have eyes. Jellyfish also use their mouths both for eating and for waste removal.
1. Why can’t we touch jellyfish?A.Because they may be stung. |
B.Because they may die easily. |
C.Because they may feel painful. |
D.Because they may hurt people. |
A.Its size. | B.Its color. |
C.Its appearance. | D.Its lifestyle. |
A.Mouth is an important organ for jellyfish. |
B.Polyps can clone themselves by laying eggs. |
C.The largest jellyfish in the world is 120 feet long. |
D.Medusas have tentacles flowing up above the body. |
A.Several facts about jellyfish. |
B.The two main forms of jellyfish. |
C.Jellyfish are neither fish nor jelly. |
D.Jellyfish have many different names. |