单项选择题

Mobile Phones: Are They about to Transform Our Lives

 

We love them so much that some of us sleep with them under the pillow, yet we are increasingly concerned that we cannot escape their electronic reach. We use them to convey our most intimate secrets, yet we worry that they are a threat to our privacy. We rely on them more than the Internet to cope with modern life, yet many of us don’t believe advertisements saying we need more advanced services.
Sweeping aside the doubts that many people feel about the benefits of new third generation phones and fears over the health effects of phone masts (天线竿), a recent report claims that the long-term effects of new mobile technologies will be entirely positive so long as the public can be convinced to make use of them. Research about users of mobile phones reveals that the mobile has already moved beyond being a mere practical communications tool to become the backbone (支柱) of modern social life, from love affairs to friendship to work. One female teacher, 32, told the researchers: "I love my phone. It’s my friend. "
The close relationship between user and phone is most pronounced among teenagers, the report says, who regard their mobiles as an expression of their identity. This is partly because mobiles are seen as being beyond the control of parents. But the researchers suggest that another reason may be that mobiles, especially text messaging, are seen as a way of overcoming shyness. "Texting is often used for apologies, to excuse lateness or to communicate other things that make us uncomfortable," the report says. The impact of phones, however, has been local rather than global, supporting existing friendships and networks, rather than opening users to a new broader community. Even the language of texting in one area can be incomprehensible to anybody from another area.
Among the most important benefits of using mobile phones, the report claims, will be a vastly improved mobile infrastructure (基础设), providing gains throughout the economy, and the provision of a more sophisticated location-based services for users. The report calls on government to put more effort into the delivery of services by mobile phone, with suggestions including public transport and traffic information and doctors’ text messages to remind patients of appointments. "I love that idea," one user said in an interview. "It would mean I wouldn’t have to write a hundred messages to myself. "
There are many other possibilities. At a recent trade fair in Sweden, a mobile navigation product was launched. When the user enters a destination, a route is automatically downloaded to their mobile and presented by voice, pictures and maps as they drive. In future, these devices will also be able to plan around congestion (交通堵塞) and road works in real time. Third generation phones will also allow for remote monitoring of patients by doctors. In Britain scientists are developing an asthma (哮喘) management solution, using mobiles to detect early signs of an attack.

The navigation product launched in Sweden is helpful to drivers because it can()

A.suggest the best route to get to a place
B.download maps of the area
C.tell them which roads are congested
D.show them how to avoid road works

热门 试题

单项选择题
What is the benefit of the revolution mentioned in the first paragraph A.With a flip of switch, electricity can be transmitted. B.Other American cities can benefit from the high-performance cables. C.Great amounts of power can be conserved. D.Detroit will first receive electricity transmitted by the new electrical cables.
An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon become the first in the country to receive electricity transmitted by ice-cold high-performance cables. Other American cities are expected to follow Detroit’s example in the years ahead, which could conserve enormous amounts of power.
The new electrical cables at the Frisbie power station in Detroit are revolutionary because they are made of superconductors. A superconductor is a material that transmits electricity with little or no resistance. Resistance is the degree to which a substance resists electric current. All common electrical conductors have a certain amount of electrical resistance. They convert at least some of the electrical energy passing through them into waste heat. Superconductors don’t. No one understands how superconductivity works. It just does.
Making superconductors isn’t easy. A superconducting material has to be cooled to an extremely low temperature to lose its resistance. The first superconductors, made more than 50 years ago, had to be cooled to -263 degrees Celsius before they lost their resistance. Newer superconducting materials lose their resistance at -143 degrees Celsius.
The superconductors cable installed at the Frisbie station is made of a ceramic material that contains copper, oxygen, bismuth (铋), strontium (锶) and calcium (钙). A ceramic is a hard, strong compound made from clay or minerals. The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen. Liquid nitrogen is supercold and lowers the temperature of the ceramic tape to the point where it conveys electricity with zero resistance.
The United States loses an enormous amount of electricity each year to resistance. Because cooled superconductors have no resistance, they waste much less power. Other cities are watching the Frisbie experiment in the hope that they might switch to superconducting cable and conserve power, too.