【推荐2】One advantage of the Internet is shopping conveniently online for clothes; one disadvantage of the Internet is also shopping conveniently online for clothes.

“Nothing fits,” said Lam Yuk Wong, a senior in electrical and computer engineering at Rice University. “Everyone says this. They order clothes and they don’t fit. People get very unhappy.”

Wong and her design partner, Xuaner “Cecilia” Zhang, are Team White Mirror, creators of what they call a “virtual (虚拟) fitting room”. Their goal is simple and consumer-friendly: to let online clothing shoppers have a perfect fit and a perfect look when shopping every time.

Both women are from China, Wong from Hong Kong and Zhang from Beijing. They both order most of their clothing online. They got the idea from their own experience as consumers and from listening to the complaints of friends and relatives. “They say, ‘The color is wrong’ or ‘I got the right size but it still does not fit.’ We want to make it like you’re in the store trying on the clothes,” Zhang said.

Using a Kinect developed by Microsoft for use with its Xbox 360 video game player,

Zhang scans Wong and turns   her image into, in effect, a virtual model, keeping Wong’s dimensions (尺寸), and even her skin and hair color. “We put the clothes on the shopper’s 3-D body models and show how they look when they are dressed,” Wong said. So far, Wong and Zhang have adapted the software to show dresses and shirts, and they are now working on shorts.

Asked if she thought men as well as women might be interested in using their virtual fitting room, Wong said, “I think their wives will care about this, so it will also be important to men.”

1. Why is shopping conveniently online for clothes a disadvantage?

A．Clothes bought online may not fit.

B．Students may easily get addicted to it.

C．It attracts more online clothing shoppers.

D．It causes shoppers to waste too much money.

2. Wong and Zhang got the idea to design a virtual fitting room from .

A．the Xbox 360 video game player	B．a program at their university
C．some shop-owners’ complaints	D．their shopping experiences

3. Which of the following shows the process of using the virtual fitting room?

A．scanning—trying on clothes—getting images

B．trying on clothes—getting models—scanning

C．scanning—getting models—trying on clothes

D．trying on clothes—getting images—scanning

4. What did Wong think of her virtual fitting room?

A．It is perfectly developed.

B．It will have its market share.

C．It is limited to women shoppers.

D．It is like a kind of video game player.

【推荐3】A study found wireless signals are able to pass through bags and suitcases to judge the sizes of dangerous metal objects and identify them. “These items could include weapons, chemicals, laptops and batteries for bombs,” the research team said on Tuesday.

Research suggested that Wi-Fi can now be used to estimate the volume of liquids such as water, acid, alcohol and other chemicals for explosive material. The study led by researchers at the Wireless Information Network Laboratory (WINLAB) in the School of Engineering showed a wireless device with two to three antennas (天线) that could be fitted in existing Wi-Fi networks.

The detection system analyzes what happens when wireless signals go through and bounce off objects or materials. The approach, which the paper states, works by separating the wireless interference (干扰) caused by two factors of objects — the material and shape. “Most dangerous objects such as weapons are usually metal or liquid, which have significant interference,” researchers said.

When it was tested on a backpack, the accuracy rate topped 95 percent. “But the accuracy dropped to about 90 percent when objects inside bags are wrapped. And the tech could save lives if used in museums, stadiums, theme parks or schools,” the team said, noting its design can inspect bags or luggage without being an exposure to privacy.

It uses channel state information (CS) that is readily available in low-cost Wi-Fi devices. “This could have a great impact on protecting the public from dangerous objects,” said Yingying Chen, a co-author of the study, “There’s a growing need for that now. In large public areas, it’s hard to set up expensive screening equipment like what’s in airports. Manpower is always needed to check bags and we want to develop a method to try to reduce manpower. “

The peer-reviewed study, which recently won a best paper award at the 2018 IEEE Conference on Communications and Network Security, is now published online. “Future work will continue to focus on improving the accuracy of identifying objects and imaging shapes and volumes,” researchers said.

1. What does paragraph 3 talk about?

A．The function of the technique.	B．The way the device works.
C．The principle the study is based on.	D．The benefit of the study findings.

2. What’s the advantage of the device?

A．It saves people in danger of natural disasters.

B．It passes through bags without damaging them.

C．It uses antennas to pick up networks’ signals.

D．It protects personal information from being exposed.

3. What is Yingying Chen’s attitude toward using the new device??

A．Indifferent.

B．Opposed.

C．Supportive.

D．Doubtful.

4. Which of the following is a suitable title for the text ?

A．Wireless Signals to Judge Metal Objects.

B．A Wireless Device for Identifying Danger.

C．Antennas to Be Fitted in Wi-Fi Networks.

D．Devices for Improving the Accuracy of Identifying Objects.

【推荐1】With intelligent systems and new-age transit networks, life in the big cities will likely be happier and more efficient.

After all, more than 60 percent of the world's population is expected to live in cities by 2050, according to a UN report. The answer to making these cities more livable for so many people lies in creating "smart" cities. These cities will use 5G networks and the "internet of things" (IoT) to make everyday life safer and more convenient. Some cities are already using smart technology to improve the lives of residents.

But what exactly does a smart city do? In the United States cities of Boston and Baltimore, smart trash cans can sense how full they are inform cleaning workers when they need to be emptied. In Amsterdam, the Netherlands, traffic flow and energy usage are monitored and adjusted according to real-time data gathered from sensors(传感器)around the city. And in Copenhagen, Denmark, a smart bike system allows riders to check on air quality and traffic condition as they ride.

Smart cities will be interactive, allowing their residents to feel like they're truly shaping their environment, instead of merely existing in it. "One of the most important reasons to have a smart city is that we can actually communicate with our environment in a way that we never have in the past," said Mrinalini Ingram, head of a telecom company.

Smart cities will also allow us to save resources. By using sensors and 5G networks to monitor the use of water, gas and electricity, city managers can figure out how to distribute and save these resources more efficiently. Emissions of carbon dioxide and other air pollutants can be more closely monitored in smart cities as well.

Of course, it will take time and money to turn our current cities into the smart cities of the future. But as we've already seen, more cities around the world are already adopting smart technology in small ways. China, for instance, is making investments in big cities like Shanghai and Guangzhou to make them “smarter” It won't be long until even more cities start to develop their own smart infrastructure(基础设施).

1. What calls for the development of smart cities?

A．The rapid progress in 5G networks.

B．The marked increase in world population.

C．The growing number of residents living in cities.

D．The major concern over the safety of living in cities.

2. How does the writer illustrate the way smart cities work?

A．By making a contrast.	B．By giving examples.
C．By listing figures.	D．By telling a story.

3. How do smart cities help us to live efficiently?

A．By interacting directly with our environment.

B．By keeping track of how the resources are used

C．By ensuring no emission of air pollutants.

D．By educating residents to save resources.

4. What is the author's attitude toward smart cities?

A．Positive.

B．Critical.

C．Doubtful.

D．Indifferent.

【推荐3】“We thought dogs would behave like children under age 5, but now we guess that perhaps dogs can understand when someone is dishonest,” says Huber at the University of Vienna in Austria. “Maybe they think, ‘This person has the same knowledge as me, but is giving me the wrong information.’ It’s possible they could see that as intentionally misleading, which is lying.”

Once that trust was established, the team had the dogs witness another person move the food from the first to the second bowl. The communicators were either in the room, and also witnessed the switch, or were briefly absent and so apparently unaware that the food had been switched. In either case, the communicators would later recommend the first bowl, which was now empty.

In previous versions of this experiment with children under age 5, the participants reacted in particular ways. They would typically ignore the communicator who gave honest but misleading advice on where the food was. However, if the communicator had been in the room and witnessed the switch, but still recommended the first (now empty) bowl, young children were actually much more likely to follow the communicator’s knowingly misleading suggestion.

This may be because the children and non-human primates (灵长类) trusted the communicator over the evidence of their own eyes, says Huber.

The dogs in the new experiment, however, weren’t so trusting of lying communicators, much to the researchers’ surprise, says Huber. Half of the dogs would follow the communicator’s misleading advice if the communicator hadn’t witnessed the food switch. But about two-thirds of dogs ignored the communicator who had witnessed the food switch and still recommended the now-empty bowl. These dogs simply went to the bowl filled with food instead. “They did not rely on the communicator anymore,” says Huber.

1. What do Huber’s words in paragraph 1 imply?

A．Dogs won’t believe people any longer.

B．Dogs can be trained to act like children.

C．Dogs can understand everything humans mean.

D．Dogs are a lot cleverer than we thought.

2. What’s the purpose of paragraph 3?

A．To draw a conclusion.	B．To sum up the reason.
C．To make a comparison.	D．To lead in a new experiment.

3. Who would the dogs trust after the food was moved?

A．The one who moved the food.

B．The one who didn’t see the food switch.

C．The one who moved the food and recommended the wrong bowl.

D．The one who saw the food switch and recommended the wrong bowl.

4. What can we conclude from the passage?

A．Dogs can sometimes tell when people are lying.

B．Dogs are cleverer than children under age 5.

C．We can train dogs to find food in different ways.

D．We should be honest like dogs.