Chinese scientists have built a chamber to simulate (模仿) the conditions on the surface of the moon to help make preparations for future lunar exploration.
The specially designed vacuum chamber is equipped with an electron gun to negatively charge dust, deuterium lights to produce ultraviolet (紫外的) rays to generate low-voltage positive electrical charge, and a vibrating screen (振动筛) designed to simulate flying dust. Scientists at the vacuum chamber have made similar dust particles (颗粒) with similar features to those on the moon. These elements together produce a chamber which can test materials and items in simulated lunar conditions.
The facility was developed by the Harbin Institute of Technology (HIT), based in the city of Harbin in Heilongjiang province in northeast China. “The comprehensive lunar surface simulator, which can simulate many environments which are very close to the real state on the moon, helps us understand the lunar dust formation process in such an environment and its effects on spacecraft, spacesuits and astronauts and prepare us for a crewed moon landing in the future,” said Li Liyi, dean (院长) of the HIT’s Institute of Space Environment and Material Science. “At the experiment chamber, we can simulate six major kinds of environmental factors. It is an experiment facility that can simulate the most environmental factors and has the comprehensive performance most similar to the real space environment in the world,” Li added.
A leading Chinese lunar scientist said that China is working to land astronauts on the moon before 2030.The country is actively working on the hardware needed for the mission, including a new launch vehicle, a new generation spacecraft for crew and a lunar lander.
A representative from the China Aerospace Science and Technology Corporation, the country’s main space contractor, presented an animated film earlier this year giving an impression of what the future Chinese crewed lunar landing might look like.
1. Why do Chinese scientists design a vacuum chamber to simulate the conditions on the surface of the moon?A.It can test ultraviolet rays on the moon. |
B.The low-voltage electrical charge can be beneficial. |
C.It can help prepare the country for future lunar exploration. |
D.It is close to the real environment on the moon. |
A.Lunar dust is a big challenge for crewed moon landing. |
B.The new facility can simulate all environments on the moon. |
C.The facility can generate the real space environment in the world. |
D.The chamber can make the future lunar exploration successful. |
A.To indicate the difficulties of crewed moon landing. |
B.To introduce China's newly-built vacuum chamber. |
C.To describe the real environment on the moon. |
D.To introduce China's crewed moon landing project. |
A.understand its impacts on spacecraft. |
B.prepare us for a crewed moon landing. |
C.help us have a better understanding of the dust formation process. |
D.help us to design flying dust. |
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【推荐1】During the Halloween season, many people visit pumpkin (南瓜) fields or carve pumpkins. But paddle (用桨划) a 1,000-pound pumpkin in a race? On October 22 in Oregon, paddlers in Halloween clothes did just that.
The West Coast Giant Pumpkin Regatta took place on the lake in Tualatin, a small city outside Portland. Back in 2004, a club called the Pacific Giant Vegetable Growers (PGVG) came up with the idea for the event. The PGVG wanted to alter their large pumpkins into boats and paddle them. They asked the city of Tualatin if they could use the lake for a party.
The first year, about 100 people showed up. Now, about 20,000 come to watch the races. “It’s just a good time to finally have some fun with these pumpkins that we’ve spent countless hours all year long trying to grow,” said Jim Sherwood, a champion pumpkin grower, who is one of the Regatta’s founders and organizers.
The PGVG provides pumpkins for the Regatta’s five races. This year, paddlers came from across the country and from as far away as France and Japan. “Surprisingly, it’s on a lot of people’s wish list to paddle a pumpkin,” said Heidi Marx, the event’s director for the city of Tualatin.
Just before the races began, the growers emptied the pumpkins. The paddlers dressed in holiday clothing jumped in, and the first race started.
Gary Kristensen from Happy Valley, Oregon, won the first race. He was dressed as the movie character Mrs. Doubtfire. It was Kristensen’s fourth year winning a pumpkin race. “Once everybody thinks you will win, it starts to give you a little bit of pressure,” he said. “Fortunately, my pumpkin was pretty fast.”
For the less competitive players, the Regatta was all about fun. “The best part is just watching all the families enjoying the day.” Marx, a player, said. People are going to remember it for a long time.”
1. What does the underlined word “alter” in paragraph 2 mean?A.Move. | B.Grow. | C.Change. | D.Hide. |
A.His pumpkin boat ran the fastest. |
B.He made the biggest pumpkin boat. |
C.He sold his pumpkins to the players. |
D.He won a competition by growing pumpkins. |
A.He had been expected to win the race. |
B.His pumpkin boat was not fast enough. |
C.He feared to make mistakes in the race. |
D.It was his first time to take part in the race. |
A.Pleasure. | B.The prize. |
C.Staying with their families. | D.The impression they left on others. |
【推荐2】UNICEF is calling on world leaders to reduce air pollution, saying it leads to the deaths of more children yearly than malaria and HIV/AIDS combined.
Around 600,000 children under age 5 die every year from diseases caused by or worsened by outdoor and indoor air pollution, especially in poor nations, UNICEF Executive Director Anthony Lake said in the introduction to a report titled “Clear the Air for Children.”
“Pollutants don't only harm children’s developing lungs, they can actually cross the blood brain barrier and permanently damage their developing brains, and, thus, their futures. No society can afford to ignore air pollution.”
UNICEF is asking world leaders to take four steps:
Reduce pollution by cutting back on fossil fuel burn and investing in energy efficiency.
Increase children's access to health care, including more immunization programs and information programs about pneumonia, a leading killer of children under 5.
Minimize children's exposure to air pollution by keeping schools away from factories and other pollution sources and using cleaner cookstoves in homes.
Improve monitoring of air pollution.
UNICEF said its air pollution report uses satellite imagery to show the global scope of the air pollution problem.
Around 2 billion children live in places with outdoor pollution exceeding World Health Organization air quality guidelines, the report said. Most of these children live in low and middle income countries.
That includes 620 million in South Asia, 520 million in Africa and 450 million in East Asia and the Pacific, UNICEF said.
The outdoor air pollution is most common in low-income, urban areas and is caused by vehicle emissions, heavy use of fossil fuels, dust and burning of waste, the report said.
The satellite map doesn't take into account the dangers of indoor pollution, primarily a problem in lower-income, rural areas where people use solid fuels like coal and wood for cooking and heating.
More than 1 billion children live in homes where solid fuels are used in this way, UNICEF said, For example, 81% of rural households, in India use this kind of fuel because it's cheap and Air pollution is an especially serious threat for children because their lungs and immune systems are developing, the report said.
Unborn children are also at risk. Studies show long-time exposure to high levels of dust matter is associated with high rates of fetal loss, premature births and lower birthrates.
1. UNICEF calls on the following steps except .A.Reduce fossil fuel combustion | B.Give children more access to health care |
C.Stop Children's exposure to air pollution. | D.Strengthen monitoring of air pollution |
A.America | B.South Africa | C.East Asian and the Pacific | D.India |
A.positive | B.negative | C.supportive | D.not mentioned |
A.a story | B.an advertisement. | C.a geography magazine | D.a news report |
【推荐3】Queen Elizabeth II, who ascended the British throne at 25, has passed away at the age of 96.
On Sept. 8, the official Twitter account belonging to the royal family confirmed the news, writing, “The Queen died peacefully at Balmoral this afternoon.”
The news comes hours after Buckingham Palace issued a statement on Sept. 8, sharing that doctors were “concerned” with the Queen’s health and recommended she “remain under medical supervision.”
While Her Majesty stayed busy with a variety of royal engagements even in the final years of her life, some royal watchers grew concerned about her heath after the Queen started using a cane and was briefly hospitalized in October 2021 for an undisclosed ailment.
In February, the fears grew stronger after she tested positive for COVID-19, just weeks after she celebrated 70 years on the British throne to become the longest-reigning monarch in British history. However, the Queen would make a rare appearance a little over three months later in May at the Royal Windsor Horse Show.
But after the first day of her Platinum Jubilee celebrations in June, the Palace shared at the time that she experienced “some discomfort,” leading her to miss the National Service of Thanksgiving at St. Paul’s Cathedral on June 3.
Back in 1952, Elizabeth became queen upon the death of her father, King George VI. In 2015, she surpassed the previous longest-reigning British monarch, her great-great-grandmother Queen Victoria, and also became the longest-serving female head of state in world history.
Her extraordinary reign included countless overseas visits with world leaders, but the Queen always viewed public and voluntary service as one of the most important elements of her work.
According to the Palace, Elizabeth had links — as President or Royal Patron — with over 600 charities, military associations, professional bodies and public service organizations.
“I declare before you all that my whole life whether it be long or short shall be devoted to your service,” Elizabeth shared on her 21st birthday, back when she was still known as Princess Elizabeth.
Elizabeth was married to the late Prince Philip for 73 years before he passed away in April 2021 at the age of 99.
At the Duke of Edinburgh’s funeral, a card was seen atop of the late royal’s coffin. The note, written on the Queen’s stationery and placed alongside flowers, appeared to read in part, “I love you”.
The Queen carried out all of her duties while raising four children: Prince Charles, Princess Anne, Prince Andrew and Prince Edward. During her incredible life, she would also welcome eight grandchildren, and 12 great-grandchildren to the Royal Family.
At the time of Philip’s passing, Prince Harry reflected on his grandparents’ incredible love story.
“The two of them together were just the most adorable couple,” he shared. “I don’t know if anyone’s ever described them as adorable but, to me, knowing the cheekiness of him and knowing that behind what the world sees you have two individuals who were very much in love, and both at a very young age, dedicated both of their lives to service. The places these two travelled, the things they saw, the experiences they went through. That is an incredible bond between two people.”
1. What is the best title of this article?A.The love story between Queen Elizabeth II and Prince Philip |
B.The Queen’s legacy would live on |
C.Long live the Queen |
D.Queen Elizabeth II passed away at the age of 96. |
A.The Queen has become the longest reigning monarch in British history. |
B.The Queen was forced to miss several events in the final stage of her life due to some health issues. |
C.The Queen reigns longer than her great-great-grandmother Queen Victoria and even longer than any other leader in the world. |
D.The Queen is always dedicated to public and voluntary service, even at the end of her days. |
A.The Queen and her husband both dedicated their lives to service. |
B.The Queen and her husband forms a special bond and shared a lot of common experiences. |
C.The Queen and her husband’s love story has become an exemplar for the whole royal family. |
D.The only person who understands Prince Philip is the Queen. |
【推荐1】NASA has put Uranus front and center according to its latest report. Its top priority for the next decade of space exploration in solar system is spending several billion dollars on a new important mission to the outer planet.
Uranus deserves a closer look. Only one spacecraft, Voyager 2, has ever visited the seventh planet from the sun in 1986. The visit was short: Uranus was one stop on the 1986 tour of the solar system, and the spacecraft made its observations while on the move. What scientists are recommending now is a mission specifically designed to study everything about the Uranian system, including the planet, its moons and its rings.
One might assume that we are pretty familiar with our neighbor. However, even with the best space telescopes, it is difficult to study a planet that is twice as far from Earth as is Saturn, and much smaller than Saturn. Name any aspect of the Uranian system, and planetary scientists can give you a list of unanswered questions about it. Unlike the other planets, Uranus spins (高速旋转) on its side, possibly the result of a crash with an Earth-sized object long ago. This unique tilt (倾斜) causes the most extreme seasons in the solar system.
By getting to know Uranus, planetary scientists can learn about a class of planets called ice giants, one of the most common planets beyond our solar system. In order to know more about ice giants, scientists should examine more closely one of our own. They picked Uranus over Neptune for practical reasons. For example, Neptune, which since 2006 has had the distinction of being the outermost planet in our solar system, is farther. With the rocket systems currently in operation, Uranus is easier to reach.
Planetary scientists saw the mission as a breakthrough because little is known about ice giants. It’s sure there are going to be lots of surprises once man gets there.
1. What can we learn about the 1986 visit to Uranus?A.It was costly but fruitful. | B.Uranus’ moons were found. |
C.It was specially designed. | D.Uranus was observed on the move. |
A.Moon. | B.Earth. | C.Saturn. | D.Uranus. |
A.More will be known about ice giants. |
B.Uranus is a ringed planet like Neptune. |
C.Uranus is the farthest planet that can be reached now. |
D.The cause of Uranus’ extreme seasons will be explained. |
A.To reveal the mysteries of Uranus. |
B.To introduce an exploring focus of NASA. |
C.To stress scientists’ efforts at space exploration. |
D.To discuss the possibilities of exploring Uranus. |
【推荐2】As the sky darkened, a school bus arrived at the museum’s gate.
A man, in a military uniform with polished medals and ribbons, boarded it and addressed the group of nine-year-olds and their young teacher. “Welcome to Roninom. My name is Major Gerard Rovego. I flew for the Imperial Space Force in the last war. I now look after our country’s greatest spaceships.”
The children had so many questions. “What was it like flying in space?” “An amazing experience! You feel like a bird soaring through the heavens.” The man had never flown in space, nor ever left the ground for that matter.
After a few more questions, the children began to yawn. “Is it time for the Miraz?” a boy asked. They must have heard the stories from the older students at their school.
In the dark oval ship, each child received a personalized ticket along with a pillow and blanket. Wide-eyed, they found their sleeping berths in the roomy cabin. “This is softer than my bed at home,” one girl said after lying down.
“After I graduated from flight school,” the man said, “I piloted ships like the Miraz. Passengers slept in these very berths(舱位)as they travelled to the Moon.”
“Did this ship really go to the Moon?” a boy asked.
“Hundreds of times.” The Miraz had never flown, and the few ships lay there just in an effort to avoid a possible defeat. “Get some rest. Tomorrow I’ll show you all the beautiful spaceships here,” he said.
“Major Rovego.” A girl paused to swallow. “Were you scared in the war?”
The man smiled. “Never. I knew I’d come home one day.” Major Gerard Rovego was killed in action while piloting the Miraz’s sister ship, the Realnos.
The children asleep, the teacher took the man aside. “Thank you so much,” she whispered. “The children will remember this for the rest of their lives. The country must have its heroes, and children should know them.”
Back in his own cabin, the man carefully removed his brother’s uniform. “You probably hate me, Gerard,” the man whispered. “You’d say that children should learn the truth about the war…”
1. What does the man in a military uniform seem to be responsible for?A.The coming kids’ health care. | B.The safety of coming visitors. |
C.The spaceships in the museum. | D.The polished medals and ribbons. |
A.A ship for sea travel. | B.A ship to fly to space. |
C.A ship for visitors to sleep in. | D.A ship that he piloted to the Sea. |
A.Unregretful. | B.Objective. |
C.Appreciative. | D.Doubtful. |
A.The truth about the past war | B.A visit to the Imperial Space Force |
C.What must remain — a heroic effort | D.A brave man — Major Gerard Rovego |
【推荐3】A robot space mission has successfully brought samples of rocks and soil from the Moon back to Earth for the first time since the 1970s. The capsule from China’s Chang’e mission landed in Inner Mongolia in December 2020, carrying with it around two kilograms of Moon material.
The unmanned Chang’e-5 spacecraft was launched in November 2020. After a 250,000-mile journey to the Moon, it entered orbit and released a small landing vehicle that fell towards the surface. Using rockets to slow its speed, the lander made a soft landing on a 1,300-metre volcanic hill called Mons Rumker, in an area called the Ocean of Storms.
The lander used a scoop (铲) and a drill fitted to a robot arm to tunnel two meters into the ground, collecting samples of rock and soil. It then blasted off from the surface, returned to the main spacecraft and automatically transferred its samples, ready for the journey back to Earth.
This is the first time in nearly 45 years that a spacecraft has got Moon rocks back. Most of the Moon material we have on Earth was brought back by astronauts during the US Apollo missions of the late 1960s and early 1970s. A little more came with robot landers from the Soviet Union (a country composed of Russia and its nearby neighbors) around the same time. The new samples are thought to be around 1.3 billion years old and have been taken to China’s capital, Beijing, for study. It’s hoped that they will allow scientists to work out more accurately the age of the Moon and other solar system objects. Xiao Long, an expert in space rocks at China’s University of Geosciences, said that the samples could “rewrite the history of the Moon”.
1. What landed on the moon and brought the moon rocks back?A.A lander. | B.A rocket. | C.A spacecraft | D.A capsule |
A.Break off. | B.Take off. | C.Turn off. | D.Get off. |
A.Once. | B.Twice. | C.Three times. | D.Four times. |
A.To change the history of the Moon. | B.To find more solar system objects. |
C.To work out the age of the Moon more accurately. | D.To make comparison with the previous samples. |