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Electronic timing is older than most people imagine and was used for the first time more than a hundred years ago at the 1912 Stockholm Olympics. Initially, the well-known company Ericsson was tasked with developing the technology, but it was the Swedish inventor Ragnar Carlstedt who eventually created the final product.

At the same time, Carlstedt introduced another invention: the finish line camera. The 1, 500-meter Olympic final was extremely close with Arnold Jackson from Great Britain winning by only 0.1 seconds. But it was impossible to decide on the silver medal since the two Americans Abel Kiviat and Norman Taber finished side by side. For the first time in history, the outcome of an Olympic event had to be settled based on a photo finish when Kiviat was judged to be “slightly ahead”.

The significance of these two inventions led a major newspaper to write: “Electronic timing at the Olympic Games. Simultaneous (同时发生的) timing and photography of contestants. A brilliant idea!”

The next step in timekeeping was the photo-finish camera with a time stamp imprinted on each picture, which was introduced at the 1932 Olympics in Los Angeles. The 1948 Olympics saw the introduction of another invention with the continuous slit camera (狭缝摄影机), where a film behind a narrow slit rolls (滚动) with the same speed as the runners. Four years later the clocks were connected to the slit camera giving a solution of 1/100 s. But it was not until 1972 that official times were recorded to the 100th of a second.

The next big step in the eighties was to make the camera digital to speed up the feedback (反馈). But the idea behind the slit camera was kept and is still the basis of all timing systems for athletics used today. The only difference is that now there is a very narrow sensor array ( 阵列传感器) instead of the moving film.

After a century technology has reached the point where the whole timing system can be stored in a smartphone. So in a way, the circle was closed when SprintTimer, a sports timer and photo finish app, was developed in the same place and precisely a hundred years after Ragnar Carlstedt.

【小题1】What do we know about electronic timing?
A.It was created in recent years.
B.It was first introduced at the Olympics.
C.It was developed by the well-known company Ericsson.
D.It was perfected by the Swedish inventor Ragnar Carlstedt.
【小题2】What does paragraph 2 focus on?
A.The increasing need for a finish line camera.
B.The excellent performance of Arnold Jackson.
C.The significant role of Carlstedt's another invention.
D.The intense competition of the 1,500-meter Olympic final.
【小题3】How was the digital camera in the eighties different from the slit camera?
A.It avoided the use of a moving film.
B.It rolled with the same speed as the runners.
C.It made a 100th-of-a-second record possible.
D.It adopted a new idea for all timing systems used today.
【小题4】What does the underlined part “the circle was closed” in the last paragraph mean?
A.Further improvement was discontinued.
B.The problem was back to the origin.
C.A new invention was created.
D.The issue was resolved.
23-24高二上·四川达州·阶段练习
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Humans have been exploring the infinite abyss (深渊) beyond Earth’s atmosphere. When astronauts explore the vast expanse of outer space, they need to wear high-tech spacesuits to protect them from the freezing conditions of the universe.

Hollywood movies have idealized the iconic suit, its design leading the masses to believe it’s an outfit that can be slipped on within minutes. In fact, the spacesuit which is made up of nearly a half dozen different components and can have up to 16 layers is its own fully functioning spacecraft that takes hours to put on and requires help from one’s colleagues.

The astronauts on the Artemis missions, NASA’s next program to send the first woman and the first person of color to the moon, will wear the latest spacesuit, called the exploration extravehicular mobility unit, also known as xEMU, according to NASA.

Each spacesuit has a portable life support system, which includes a water tank for the cooling garment and carbon dioxide removal system to regulate body temperature, remove excess heat and maintain the astronauts’ health, said Richard Rhodes, the deputy lead for xEMU pressure garment development at NASA. A two-way radio system is also included so the astronauts can communicate during the missions.

“When the Apollo astronauts walked on the moon, they couldn’t bend over and pick up a rock,” said NASA astronaut Mike Fincke. Fortunately, spacesuits have come a long way since then and have a more flexible structure with gloves. The gloves are one of the most complicated parts of the spacesuit, said Cathleen Lewis, curator of the Smithsonian Institution’s National Air and Space Museum. “Gloves are very difficult to design to be protective and also allow the manual dexterity (灵巧) that astronauts need to do meaningful work.” she noted.

The spacesuits will also be getting some upgrades for the latest lunar mission. Richard Rhodes’s team is working on the spacesuit that will allow for more movement to explore the rough terrain of the moon while still being strong enough to protect the wearer.

【小题1】What can we learn about the spacesuit in Hollywood movies?
A.It provides the most ideal design.B.It functions as a spacecraft of its own.
C.It can be put on without too much difficulty.D.It can protect the astronauts from the cold in space.
【小题2】In what aspect does Paragraph 4 mainly talk about the latest spacesuit?
A.Its operating methods.B.Its component parts.
C.Its existing problems.D.Its initial aims.
【小题3】Why are the Apollo astronauts mentioned in the passage?
A.To contrast the Apollo spacesuit with the latest one.
B.To give an example of a successful space mission.
C.To demonstrate the failure of the Apollo missions.
D.To criticize the incompetence of the Apollo astronauts.
【小题4】Which of the following best describes NASA’s spacesuit for the next lunar mission?
A.High-tech but impractical.B.Portable and mobile.
C.Costly but well-received.D.Flexible and protective.

British scientists seeking to protect the environment have designed a biodegradable mobile phone cover that breaks down in soil when discarded and sprouts (发芽)a flower from a seed put inside the case. Researchers at the University of Warwick in central England said the novel device, made from a specially designed polymer (聚合材料),is a blessing for the environmentalists.

Millions of mobile phones are thrown away every year as the industry produces large quantities of new models without caring about the quality. “It is really original in the phone industry and consumers are happy because they feel they are doing something for the local environment,” said Keny Kirwan from the university of Warwick. Designers have made the hesitant users feel sure that the seed, put into a transparent window, only sprouts when the phone cover is discarded. “We put sunflower seeds into the covers of the samples, but we are working with gardening researchers to identify which other flowers would perform best. Maybe we could put poppies (虞美人)or roses next time,” said Kirwan.

【小题1】Why is the new mobile phone unique?
A.It is popular with young people.
B.It is environmentally friendly.
C.The user can make it flower whenever he or she likes.
D.Its colour is beautiful.
【小题2】What does the underlined word “ discarded” mean?
A.Thrown away.B.Updated.C.Cleaned.D.Replaced.
【小题3】What can be a suitable title for the text?
A.Good News for EnvironmentalistsB.Promising Mobile Phone
C.Changing Wastes into ValuablesD.Flowering Mobile Phone
【小题4】In which section of a magazine may this text appear?
A.Entertainment.B.Science and technology.
C.Education.D.Health.

There is a new type of animal that has been walking on the beaches since the 1990s. They are called Strandbeast, which is Dutch language for beach beast. But these beasts are mainly made of plastic tubes and wood. They are creations of a Dutchman Theo Jansen, who designs kinetic sculptures (雕塑). Jansen's creations look alive when they do a steady and smooth motion on the hard sand. They can push themselves forward using nothing more than the power of the wind.   The beauty of these creations is that they have no electronic parts, and yet they have a basic logic system that helps them walk in their habitat.

Jansen's kinetic sculptures use an revolutionary design to change simple motions into amazing works of art. The Strandbeasts have a mechanical linkage (连杆) that creates a walking motion using triangles. The fascinating combination of thin tubes and fine fin—like (鱼鳍般的) sails which flap in the wind create a   striking image. Jansen has even created a way for his beasts to “eat” the air, and store its   power by pressurizing bottles (增压瓶). This stored power also allows for sculptures to recognize when they have entered water and change their direction.

These sculptures are large but have a fine appearance. Besides, Jansen's designs also work with heavier structures. He created a beast, named Animaris Rhinoceros Lignatus, which was made out of wood and weighed 250 kilograms. Every year, he improves his designs. His hope is that one day he will create herds of beasts that can "live" on the beaches and survive without the help of humans.

Kinetic art isn't just about making large sculptures move. There are many artists that use motion to create amazing visual effects. Some are large pieces, but many can sit on a desk or hang on a wall. However, they all have one thing in common: you can't appreciate their artistry until you see them move. Jansen also sells mini versions of some of his beasts. They come in kits (成套零件) that you can fit them together without any special tools. You, too, can try your hand at creating kinetic art!

【小题1】What does the animal mentioned in paragraph1 refer to?
A.A movable sculpture.B.A plastic sculpture.
C.A creation of wind.D.A forest animal.
【小题2】What aspect of the kinetic sculptures is paragraph 2 mainly about?
A.The beautiful appearance.B.The designer.
C.The design principle.D.The stored power.
【小题3】Why are kinetic sculptures fine arts?
A.They are some sort of life form.
B.Ordinary people can create them.
C.They have large but soft structures.
D.Their motion gives people a pleasure for their eyes.
【小题4】What do we know about Theo Jansen?
A.He is a stubborn designer.
B.He loves doing woodwork.
C.He's a successful salesman.
D.He's an imaginary and ambitious artist.

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