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题型:阅读理解-阅读单选 难度:0.65 引用次数:191 题号:13692124

Fog often leads to serious, costly accidents---particularly around airports, docks and highways. Monitoring visibility conditions in real time could improve public safety and save tens of millions of dollars in the transportation area alone. But conventional fog -detection systems---including satellites, visibility sensors and human observations---can suffer from poor resolution (分辨率), high cost or low sensitivity near the ground ,where monitoring is quite critical.

Recently, engineers Noam David and H. Oliver Gao, both from Cornell University, developed a way to use signal data from cell-phone towers to detect atmospheric conditions that can easily develop fog. Wireless communications data are passed within networks of antenna towers (天线塔) as microwave radiation. And the change in weather conditions can affect the strength of signals received at the towers. Thus, communications data offer a low-cost, continuous means of fog monitoring.

David and Gao successfully employed this approach to predict fog around the land in Tel Aviv, Israel, for over an hour before it appeared. They identified patterns in how the strength of microwave signals is altered in response to different humidity (湿度) and temperature. Unlike satellites, the method distinguishes between ground-level fog and low-level clouds.

Communication networks are used effectively worldwide, which would make it easy to adopt this method in most regions. “In principle, we could use existing systems for day-to-day early detection of fog formation,” David says. “Because system data can be received in real time, we can imagine short-term early warning against fog." He advocates careful testing in diverse parts of the word to explore the method's limitations.

The new work shows it is possible to detect the conditions that happen before fog forms. Kelly Caylor, an environmental scientist, who was not involved in the work, says, “It's a significant step forward. There's something remarkable and quite satisfying about finding so many signals in what would otherwise be considered noise.”

1. What can we know about the conventional fog-detection systems?
A.They do not work very well.
B.They're only elective in some areas.
C.They've been improved in transportation.
D.They do not monitor the situation near the ground.
2. The underlined word “altered” in Paragraph 3 can be replaced by ________.
A.Emphasized. .B.Generated.C.Detected.D.Changed.
3. What is Kelly Caylor's attitude towards the new way of detecting fog?
A.Indifferent.B.Favorable.C.Critical.D.Doubtful.
4. What does the text mainly talk about?
A.Different opinions on a new way to detect fog.
B.The wide availability of communication networks.
C.The urgency of detecting fog to ensure public safety.
D.The detection of fog through signals from cell-phone towers.

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【推荐1】We set out to revolutionize fashion techwear —starting with the classic white dress shirt, made with heart and precision. Paying close attention to details, combined with high quality cotton fabric and latest hydrophobic nanotechnology (疏水纳米技术), results in nothing less than a masterpiece.

The nanotechnology works by modifying the fabric molecules (分子). The hydrophobic properties are locked into the weave of the fabric, which makes liquids bead-up and roll off the fabric surface. Our Fooxmet white shirt use 72% combed cotton and 28% Sorona fabric. Combed cotton is a kind of cotton that has been combed to make the thread stronger. Sorona is the fiber that defines softness, with a flexibility beyond limits.

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Simplicity and emptiness make the great universality, embracing the feelings and thoughts of all people. Our Japanese designers put precise attention to details with admirable d create the Fooxmet white shirt.

There are always risks to every kickstarter project, but we are confident to ensure our backers to receive Fooxmet on time. The material and technology itself have already been and tested. Currently we are done with modeling and mass production will start upon the success of We are confident to foresee and de-risk most of the difficulties faced in production.

1. What make(s) the Fooxmet white shirt soft?
A.Nanotechnology.B.Combed cotton.
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2. What is the Fooxmet white shirt like?
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3. What can be inferred from the last paragraph?
A.The project will kick off on time.
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【推荐2】With energy bills rocketing, and global temperatures teetering (岌岌可危), Deep Green, a small data centre startup, and Exmouth Leisure Centre have found a way to help each other.

Since the start of the pandemic, energy costs for a leisure swimming pool have reportedly tripled, leaving many centres with no choice but to close, according to Swim England. They claim that by March 2024, 40 percent of council areas could risk losing their swimming pools if nothing changes.

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Deep Green isn’t the only company to come up with a neat solution to using waste-heat. In Paris, the Condorcet data centre is heating an onsite Climate Change Arboretum that studies which plants are most adaptable to global warming. Similarly, the Notre Dame Centre for Research Computing heats a local municipal greenhouse. So as Bjornsgaard says, this is just the start.

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Today, Rubik continues to work as a professor and is a board member of the Rubik’s company. He is also a staunch (忠实的) advocate for STEM (science, technology, engineering, and mathematics) and arts education and encourages his own company and others to take the lead.

“I prefer to call it STEAM (science, technology, engineering, art, and mathematics)”, because I think art is an important part of education. The key is starting early, from elementary school, and continuing on and on,” he said.   “This small blue planet and its entire interdependent population depends on future generations learning these subjects.   I and my company have tried to help. We’ve introduced the ‘You CAN Do the Rubik’s Cube’ course to hundreds of schools across the United States and are expanding it elsewhere to help students to learn in an engaging, interactive, practical way.”

1. Why did Rubik invented the Rubik’s cube?
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