1 . The oceans play a crucial role in lightening global warming by absorbing carbon dioxide emissions. However, in a study conducted by the University of Texas, researchers found that the oceans’ capacity to absorb carbon dioxide (CO₂) would reach its maximum by 2100 and decrease to half of its current efficiency by 2300, based on a climate simulation (模拟) that was set for a worst-case emissions scenario (设想).
The decline happens because of a surface layer of low-alkalinity (碱度) water that can hinder the ability of the oceans to absorb CO₂. Alkalinity affects how much CO₂ can dissolve in seawater. Although the emissions scenario used in the study is unlikely because of global efforts to limit greenhouse gas emissions, the findings reveal a previously unknown tipping point that if activated would release an important brake on global warming.
“We need to think about these worst-case scenarios to understand how our CO₂ emissions might affect the oceans not just this century, but next century and the following centuries. Climate simulations had previously shown that the oceans slow their absorption of CO₂ over time, but none had considered alkalinity as an explanation. We recalculated pieces of a 450-year simulation until we hit on alkalinity as a key cause of the slowing.” said Megumi Chikamoto, who led the research at the University of Texas Institute.
The effect begins with extreme climate change, which slows ocean currents. This leaves the surface of the oceans covered in a warm layer of fresh water that won’t mix easily with the cooler, more al kaline waters below it. That means more of it is left behind in the atmosphere. This in turn produces faster warming, which sustains and strengthens the low-alkalinity surface layer. Co-author, Pedro DiNezio, said that the discovery was a powerful reminder that the world needs to reduce its CO₂ emissions to avoid crossing this and other tipping points.
1. What may happen after the year 2300?A.More CO₂ will be absorbed by the oceans. |
B.The oceans will lose all their current efficiency. |
C.The world will face even more severe warming. |
D.The oceans will be less crucial to global warming. |
A.Improve. | B.Weaken. | C.Protect. | D.Control. |
A.Finding why they slow CO₂ intake is hard. |
B.Their ability to absorb CO₂ is at their maximum. |
C.They will decide on the future of human beings. |
D.They will slow down CO₂ absorption very quickly. |
A.A biology textbook. | B.A government report. |
C.Science fiction. | D.An environmental journal. |
Acupuncture (针灸) is a traditional Chinese medical practice of treating
The effectiveness of acupuncture left Reston such a deep
The National Institutes of Health (NIH) began to sponsor some of their top
3 . Paen Long has had a dream ever since he saw a plane for the first time at the age of six. His dream was to
It took him a year to build his plane, using mostly recycled materials. The plane’s first
Although the first try failed, Paen Long remains
His wife, Hing Muoyheng,
A.repair | B.make | C.draw | D.buy |
A.carefully | B.impatiently | C.secretly | D.suddenly |
A.make use of | B.make fun of | C.get tired of | D.turn to |
A.expected | B.saved | C.stolen | D.borrowed |
A.recording | B.producing | C.showing | D.watching |
A.design | B.flight | C.interview | D.meeting |
A.Therefore | B.Besides | C.However | D.Otherwise |
A.angry | B.excited | C.proud | D.embarrassed |
A.determined | B.kind | C.nervous | D.upset |
A.anxious | B.sorry | C.hungry | D.grateful |
A.hears | B.knows | C.talks | D.worries |
A.chance | B.aim | C.choice | D.reason |
A.experts | B.classmates | C.volunteers | D.workers |
A.fly | B.stop | C.help | D.leave |
A.suggestion | B.dream | C.result | D.research |
4 . In late 2021, I began to have a little bit of a midlife crisis. When my father was 48 years old, he had a heart attack that nearly ended his life. As I
As I was trying to determine what kind of
I also did a detailed training
That day, Big Sky Montana, was unseasonably
A.finished | B.designed | C.approached | D.changed |
A.public | B.big | C.equal | D.dangerous |
A.record | B.test | C.goal | D.trap |
A.race | B.training | C.town | D.place |
A.adopted | B.created | C.covered | D.hosted |
A.distance | B.display | C.competition | D.game |
A.exciting | B.challenging | C.breathtaking | D.surprising |
A.ride | B.trouble | C.gain | D.show |
A.changing for | B.leaving for | C.paying for | D.looking for |
A.plan | B.service | C.exchange | D.center |
A.served | B.missed | C.offered | D.followed |
A.hot | B.cool | C.mild | D.common |
A.expected | B.used | C.exposed | D.proved |
A.kept | B.took | C.hid | D.dropped |
A.forgot | B.made | C.caught | D.appreciated |
The snowstorm was supposed to hit the evening of Monday, Jan. 31, 2022. My colleague and I were co-signing an emergency financial aid check for a student at First Nations University in Regina, then he left for the day. As I was packing up, I noticed he had left his laptop bag there.
“Shoot,” he said when I called him. “I’m already home.”
“I can bring it to you.” I assured him. It was just past 4:30 p. m. The snow wasn’t supposed to start until later. It took me about 15 minutes to get to my colleague’s house, where I dropped off the laptop case and got right back on the road. Then suddenly the snow started -and it was coming down fast. Within minutes I was in a whiteout.
The road soon switched from paved to gravel (碎石), forcing me to slow down. The windows were fogging up and getting covered with snow. It was extremely cold outside. I didn’t have a clue where I was or even which side of the road I was on. I kept the car running to stay warm and called 911, but they said nobody was coming to get me until morning at the earliest.
It was now about 6 p. m. and dark. I stopped the car and texted my colleague whose laptop bag I had just returned. But he had an idea. “Pin your location on Google Maps and send it to me,” he said. I did, and a few minutes later he texted me back a screenshot of the satellite view of where I was. We figured out that I was on a road called Bouvier Lane, in between two farms. It was now 6:30 p. m. We posted this new information to our Facebook community group, pleading (恳求) for anyone who knew who lived on the farms to help me get rescued.
Soon enough, though, people started chiming (发表评论) in on my post. They knew the farmer who lived there! I got a message from someone who was going to put me in touch with them.
注意:
1.续写词数应为150左右;
2.请按如下格式在答题卡的相应位置作答。
At 8 p. m., my cellphone rang.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
By 5:30 the next morning, walking out of the house, I found two people on the driveway.
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1.特色景点简介;
2.给出参观建议。
注意:
1.写作词数应为 80个左右;
2. 请按如下格式在答题卡的相应位置作答。
Dear Alex,
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Yours sincerely,
Li Hua
China is known as Xia for its grand etiquette (礼仪) culture, and known as Hua for its beautiful attire (衣裳). With the
“In ancient China, emperors like Huangdi. Yao, and Shun brought peace to the world through their clothing.” Clothing holds
What is the Chinese style? It is something that makes people think of China as soon as they see it. For example, the horse-face skirt, which
8 . The ability to track animals and plants is up in the air —literally —thanks to help from an unexpected source.
Around the globe, many air quality control stations filter (过滤) air through small paper disks on a daily or weekly basis, allowing scientists to ensure concentrations of harmful pollutants such as heavy metals are below certain levels. But the filters also pick up plant and animal DNA having been scattered (播撒) into the wind.
The eDNA, short for environmental DNA, on those filters could make air quality control stations a treasure house of samples cataloging local animals and plants. Such records could help researchers track biodiversity at a larger scale and more easily catch species declines or track how ecosystems are changing overall.
“We’re effectively carrying on with it for a totally new use,” says Elizabeth Clare, a molecular ecologist at York University.
“It never occurred to us that these filters capturing particulate (微粒的) matter could even be analyzed for eDNA,” says James Allerton, an air quality scientist in England. That changed when Allerton read a news story about two studies where scientists cleared animal DNA out of thin air at two zoos, one in England —led by Clare —and another in Denmark.
Learning about the potential for capturing eDNA sparked a “light bulb moment,” Allerton says, and he reached out to Clare to cooperate.
Clare, Allerton and colleagues analyzed filters from the Teddington facility that were exposed to surrounding air for one hour, one day or one week. The team also examined eight-month-old filters from an air quality control station in Scotland that had each been exposed to air for a week.
Genetic material in the filters revealed the presence of more than 180 different types of local animal groups including pine trees, badgers, owls, fungi and news. That volume is surprising given that the filters and storage conditions weren't set up with eDNA in mind. That the researchers recovered so much eDNA from a system designed to monitor air quality shows how common airborne (空气中的) DNA is and how much biodiversity data could be up for grabs.
1. What is the new use of air quality control stations?A.To purify air by decreasing pollutants in it. |
B.To study the links between man and animals. |
C.To concentrate on effects of animals on climate. |
D.To help track the categories of animals and plants. |
A.He felt doubtful and hesitant to use it. |
B.He felt useful but reluctant to admit it. |
C.He felt unimaginable but ready to accept it. |
D.He felt amazed but refused to have an attempt. |
A.Airborne DNA is quite uncommon in the system. |
B.Over 180 types of living plants have been detected. |
C.It is not easy for researchers to collect biodiversity data. |
D.Researchers didn't take eDNA into account in the first place. |
A.Air Pollutants are Found in Animals and Plants |
B.Tracking Evolution of Living Things Benefits eDNA |
C.Air Pollution Monitoring May Help Track Biodiversity |
D.eDNA Technology Proves a Big Success in Air Detection |
9 . Architectural Wonders Inspired by Nature
Atomium: Brussels
Originally constructed for the 1958 World’s Fair, or Expo 58, this weird (古怪的) building features nine interconnected spheres (球体) measuring 335-feet high. Engineer Andre Waterkeyn and architects Andre and Jean Polak modeled it after an iron crystal enlarged 165 billion times to represent faith in scientific progress. Today the interior is home to a museum and several temporary exhibits.
The Cube Houses: Rotterdam
Despite all the hard angles and straight lines, architect Piet Blom actually took inspiration from a forest of trees when designing these Dutch houses back in 1977. Each bright yellow cube is tilted (倾斜的) on its side by 45 degrees and anchored to a hexagon-shaped pylon (六边形塔架), representing a tree. The entrance to each three-level house lies inside the concrete “trunk” that contains a staircase.
Taipei 101: Taipei
Standing at 1,671 feet tall, this 101-story skyscraper was the tallest building in the world when it opened in Taipei’s modern Xinyi District in 2004. Renowned architect C. Y. Lee modeled it after a bamboo stalk, and its repetitive sections are full of symbolism. There are a total of eight parts comprised of eight floors each -a lucky number in Chinese culture.
Helix Bridge: Singapore
An international team, assembled from Architects 61 in Singapore, designed this footbridge stretching over Marina Bay, linking the famous hotel and shopping center with the ArtScience Museum and Gardens by the Bay. The inspiration comes from the double helix (螺旋的) structure of a DNA molecule. Opened in 2010, the 919-foot long curved structure has five viewing platforms, giving pedestrians spectacular views of the skyline from across the waterfront.
1. What was the original purpose of building Atomium?A.Preparing for Expo 58. |
B.Preparing for a museum. |
C.Preparing for some exhibits. |
D.Preparing for an iron crystal. |
A.They are very straight like big trees. |
B.Each cube is tilted about 45 degrees. |
C.They are the oldest of the 4 buildings. |
D.They are designed by a famous architect. |
A.To Atomium. | B.To the Cube Houses. |
C.To Taipei 101. | D.To Helix Bridge. |
10 . Most children now chat daily either online or through their mobile phones.
Sometimes the online world, just like the real world, can cause problems, such as bullying (恃强凌弱) or arguments.
A.Going online is great fun. |
B.Computer studies are part of schoolwork now. |
C.The language of chat is strange to many parents, too. |
D.There are some websites that are not suitable for the children. |
E.To keep children safe, your management must cover the family computer. |
F.They are connecting to a huge number of other children all over the world. |
G.Surfing the Internet takes up too much of the time that should be spent on lessons. |