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题型:阅读理解-阅读单选 难度:0.65 引用次数:69 题号:22075493

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.
2. What can we infer from what Li Liyi said in the passage?
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.
3. What is the author’s purpose to write this passage?
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.
4. Which application of the lunar surface simulator is not mentioned below?
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.
【知识点】 新闻报道 航空航天

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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.
2. What do we know about Jim Sherwood?
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.
3. Why did Gary Kristensen feel stressed before the race?
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.
4. What is the most important for the less competitive players?
A.Pleasure.B.The prize.
C.Staying with their families.D.The impression they left on others.
2024-02-16更新 | 23次组卷
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【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 combustionB.Give children more access to health care
C.Stop Children's exposure to air pollution.D.Strengthen monitoring of air pollution
2. According to the passage, which country's children are less likely to die from air pollution than the others?
A.AmericaB.South AfricaC.East Asian and the PacificD.India
3. The author's attitude towards the steps that UNICEF calls on world leaders to take is       .
A.positiveB.negativeC.supportiveD.not mentioned
4. This passage is probably taken from
A.a storyB.an advertisement.C.a geography magazineD.a news report
2020-12-22更新 | 24次组卷
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【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.”

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B.The Queen’s legacy would live on
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C.The Queen reigns longer than her great-great-grandmother Queen Victoria and even longer than any other leader in the world.
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3. What can be implied from the last paragraph?
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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.
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