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What is 5G technology？ When it arrives, 5G technology will utilize a higher-frequency band

of the wireless spectrum called millimeter wave that allows data to be transferred much more rapidly than the lower-frequency band dedicated to 4G. The downside is that millimeter wave signals don’t travel as far: The new 5G networks will require many more (albeit smaller) antennas spaced closer together than previous wireless generations.

A、毫米波频段的 5G 比低频段的 5G 有更大的发展潜力

B、由于频率升高，视距传播距离限制，5G一般需要比 4G系统更为密集的基站体系

C、5G 但基站功耗低，可以实现远距离传输

D、How much better than 4G will it be？ It depends who you ask. Verizon has said that its 5G network will likely deliver speeds 200 times faster than many of its 4G LTE users get now. According to Gizmodo, 5G networks will have the capacity for transfer speeds 10 times those of 4G networks. Other forecasts vary considerably, with some experts saying that 5G connections will initially be about three times faster than 4G, and others making claims on par with Verizon’s. One big reason for those discrepancies is that 5G hardware standards haven’t yet been agreed upon by the telecommunications industry. The carriers are still developing several versions of the technology. So naturally, there’s no clear "speed multiple." But all companies involved are pursuing 5G that will be significantly faster than today’s mobile wireless connections. （5G 和 4G 对比，速率优势比例不确定，优势肯定有）

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更多“What is 5G technology？ When it…”相关的问题

第1题

It's not technology that will determine the shape of land transport so much as political, economic and environmental considerations. We can build stronger, quieter roads with better skid resistance now, but we don't because of the cost.

The environmental lobby has had a huge impact on car manufacturers and emission control has improved a lot. But there's still some way to go on the air pollution front, particularly for lorries which run on diesel fuel, which is bad because of its particulate emission when it is burnt.

Cars and lorries could be driven by electric motors if fuel-cells, which convert fuel into electricity without burning it, can be made more efficient. However, they've been advertised for a generation and have never really met expectations. American domination of the automotive industry makes rapid progress unlikely. Because the cost of gasoline is so low in the States, there's not much incentive to develop fuel cells and electric vehicles for widespread use.

When it comes to communication, we already have Trafficmaster, which operates from transducers on motorway bridges to gauge the speed of the traffic and warn of blockages ahead. We also have global navigation satellites that can pinpoint your position. The challenge is to provide a full driver guidance system that can tell you the best direction to go in a way you can absorb at the wheel.

The next big step in transport technology will be automated roads: regulating vehicles in convoys on motorways so that they're safer and can be packed closer together. Sensors would establish what is around each vehicle and electronic control systems would keep them moving in the right direction, at the right safe speed, with maximum comfort and economy. The technology is massively expensive now, but eventually it will become a reality. You would just pay a toll, couple your car into an electronic convoy and sit back to enjoy the journey.

Motorways will gradually become more like railways, with freight vehicles electronically coupled in trains running at relatively high speeds. At suitable intervals, they would uncouple to travel the remainder of the journey with their own driver. That's almost certainly going to happen. In Adelaide there are already buses that run on an automated route for part of their journey.

That sort of combination if personal and centralized control is the direction we're going in road transport, probably first of all for freight. Any rail system has in the end to be inflexible, it doesn't go where you want, especially in rural communities, where the nearest station can be 30 miles away. We're wedded to private cars, because of their flexibility and the pride people take in ownership -- not to mention the huge sums we've spent on the road network.

So cars aren't going to go away. But under electronic control 'they will become greener and safer. In 50 years driving your own car on a fast motorway, mixed up with lorries, and passing at a closing speed of 150 mph within a few metres of people driving other vehicles in the opposite direction will seem. completely insanity.

The word "absorb" in Paragraph 4 means ______.

A．drive

B．suck in

C．acquire

D．run

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第2题

SECTION B ENGLISH TO CHINESE

Directions: Translate the following text into Chinese.

What is globalization? The short answer is that globalization is the integration of everything with everything else. A more complete definition is that globalization is the integration of markets, finance, and technology in a way that shrinks the world from a size medium to a size small. Globalization enables each of us. wherever we live, to reach around the world farther, faster, deeper, and cheaper than ever before and at the same time allows the world to reach into each of us farther, faster, deeper, and cheaper than ever before.

I believe this process is almost entirely driven by technology. There's a concept in strategic theory, stating that capabilities create intentions. In other words, if you give people B-52s, they will find ways to use them. This concept is quite useful when thinking about globalization, too. If I have a cell phone that can call around the world at zero marginal cost to 180 different countries, I will indeed call around the world to 180 different countries. If I have Internet access and can do business online, a business in which my suppliers, customers, and competitors are all global, then I will be global, too. And I will be global whether there is a World Trade Organization agreement or not.

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第3题

Funky, skunky beer

"There are no health repercussions for out-of-date beer," says Dave Radzanowski, president of the Siebel Institute of Technology, a vocational training school for the beer industry. That' s because beer doesn' t support the growth of pathogens or disease-causing organisms. The combination of carbon dioxide, alcohol, low pH (high acidity), and antiseptic hops means that no pathogenic bacteria will survive. As the saying goes, if you can' t drink the water, drink the beer.

But, over time, beer can start to taste "papery" or "bready," changes a discerning drinker will notice after two to three months. Because thicker beers can mask the developing flavors, lighter beers will taste funky more quickly. Also, when the hops in beer are exposed to light, they start to give off a "skunky" flavor, says Radzanowski. The alcohol content, however, won't change as long as the packaging is intact.

Three summers of sunscreen

Most sunscreens are used up long before their expiration dates, although only some sunscreens carry an expiration date at all. According to regulations from the Food and Drug Administration, over-the-counter pharmaceuticals that show stability for three years do not have to carry an expiration date. Newer products will carry a two-year expiration date from the time of manufacture.

Whether a sunscreen actually degrades over time is a matter of-dispute. David Wiggins of ScheringPlough says that testers put his company' s Coppertone products in 122 degree Fahrenheit for three months and found virtually no change. And there was drop in the concentration of active ingredients at high temperatures or room temperature for five years, he says. But Darrell Rigel, president of the American Association of Dermatologists, disagrees, saying the active ingredients — PABA, benzolphenols, and oxybenzols — degrade significantly ih heat. "It's well accepted that in extreme heat, like a hot ear in the sun that can get up. to 160 or 180 degrees, over time a sunscreen can become 50 percent less effective," says Rigel. Bottom line: don't keep your sunscreen in the glove compartment all summer. And if you have any doubt about the potency of your sunscreen, reach for a new bottle. "The problem is the lack of efficacy,” says Mark Naylor, a tumor biologist, "when you think you're protected and you're really cooked.”

Over time, flavors of ______beers change more quickly.

A．lighter

B．thicker

C．0Ut-of-date

D．skunky

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第4题

Will chips one day be planted in our bodies for identification?

A US doctor has planted under his skin a computer chip (芯片) that can send personal information to a scanner(扫描仪) ,a technology that may someday be widely used as a way to identify (识别) people. The chip gives off information which will be scanned by a hand-held reader.

The chip is similar to that planted in more than 1 million dogs, cats and other pets in recent years to track and identify them.

The doctor decided to test the chip himself after the World Trade Center disaster(灾难). The dead could have been identified if their names and other important information had been chipped.

Officials of the company said they hope to sell the chips to patients with man-made arms or legs or other body parts. The idea is that the chip will provide immediate and correct medical information when it is needed.

The information can contain name, telephone number and other information. So it can send out a message that, when connected to a computer, can call up records. The scanner can read it through clothes from over a meter away. The new product also could be used to control prisoners. Workplaces of great importance may want to use the chips for employees, too. Some parents may consider planting chips in young children or elderly relatives who may be unable to say their names, addresses or telephone numbers.Some medical and technology specialists said the product raises new questions about the relationship between humans and computer technology and could cause problems if it is used against someone's wishes, or if your personal information is read by those who should not see it.

According to the text, computer chips have already been used to______.

A．catch escaped prisoners

B．find missing children

C．follow lost animals

D．treat sick people

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第5题

What is the "double message "a parent sends to his children when he says "no"?

A．Other parents say "yes" and I say "no."

B．I love you, but you have to obey me.

C．I don't care what other parents say: in my house this will not do.

D．I love you, but I have to let you know what is good for yon.

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第6题

When we worry about who might be spying on our private lives, we usually think about the Federal agents. But the private sector outdoes the government every time. It's Linda Tripp, not the FBI, who is facing charges under Maryland's laws against secret telephone taping. It's our hanks, not the Internal Revenue Service (IRS), that pass our private financial data to telemarketing firms.

Consumer activists are pressing Congress for better privacy laws without much result so far. The legislators lean toward letting business people track our financial habits virtually at will.

As an example of what's going on, consider U.S. Bancorp, which was recently sued for deceptive practices by the state of Minnesota. According to the lawsuit, the bank supplied a telemarketer called Member Works with sensitive customer data such as names, phone numbers, bank-account and credit-card numbers, Social Security numbers, account balances and credit limits.

With these customer lists in hand, Member Works started dialing for dollars-selling dental plans, videogames, computer. software and other products and services. Customers who accepted a "free trial offer" had 30 days to cancel. If the deadline passed, they were charged automatically through their bank or credit-card accounts. U.S. Bancorp collected a share of the revenues. Customers were doubly deceived, the lawsuit claims. They didn't know that the bank was giving account numbers to Member Works. And if customers asked, they were led to think the answer was no.

The state sued Member Works separately for deceptive selling. The company defends that it did anything wrong. For its part, U.S. Bancorp settled without admitting any mistakes. But it agreed to stop exposing its customers to non-financial products sold by outside firms. A few top banks decided to do the same. Many other banks will still do business with Member Works and similar firms.

And banks will still be mining data from your account in order to sell you financial products, including things of little value, such as credit insurance and credit-card protection plans. You have almost no protection from businesses that use your personal accounts for profit. For example, no federal law shields "transaction and experience" information--mainly the details of your bank and credit-card accounts. Social Security numbers are for sale by private firms. They've generally agreed not to sell to the public. But to businesses, the numbers are an open book. Self-regulation doesn't work. A firm might publish a privacy-protection policy, but who enforces it?

Take U.S. Bancorp again. Customers were told, in writing, that "all personal information you supply to us will be considered confidential". Then it sold your data to Member Works. The bank even claims that it doesn't "sell" your data at all. It merely "shares" it and reaps a profit.

Contrary to popular belief, the author finds that spying on people's privacy______.

A．is mainly carried out by means of secret taping

B．has been intensified with the help of the IRS

C．is practiced exclusively by the FBI

D．is more prevalent in business circles

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