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Прочитайте текст и выполните задания. Fiber-optic communication 1. In fiber-optic communications inf...: ответ на тест 893220 - Английский язык

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Fiber-optic communication
1. In fiber-optic communications information is transmitted by sending light through optical fibers. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
2. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Due to much lower attenuation and interference, optical fiber has large advantages over existing copper wire in long-distance and high-demand applications. However, infrastructure development within cities was relatively difficult and time-consuming, and fiber-optic systems were complex and expensive to install and operate.
3. Due to these difficulties, fiber-optic communication systems have primarily been installed in long-distance applications, where they can be used to their full transmission capacity, offsetting the increased cost. Since 2000, the prices for fiber-optic communications have dropped considerably.
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Варианты ответов
  • Due to the difficulties concerning complexity and high price of fiber-optic communication systems, they have only long-distance applications.
  • Optical fiber is more advantageous over existing copper wire in long-distance and high-demand applications due to its excellent operating characteristics.
  • Fiber-optic communication systems are effective kind of wire communication but are not commonplace for their complexity and expensiveness.
  • Fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 16:05
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 16:05

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Вопрос № 922958

Прочитайте текст и выполните задания.
Fiber-optic communication
1. In fiber-optic communications information is transmitted by sending light through optical fibers. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
2. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Due to much lower attenuation and interference, optical fiber has large advantages over existing copper wire in long-distance and high-demand applications. However, infrastructure development within cities was relatively difficult and time-consuming, and fiber-optic systems were complex and expensive to install and operate.
3. Due to these difficulties, fiber-optic communication systems have primarily been installed in long-distance applications, where they can be used to their full transmission capacity, offsetting the increased cost. Since 2000, the prices for fiber-optic communications have dropped considerably.
Определите основную идею текста.
Due to the difficulties concerning complexity and high price of fiber-optic communication systems, they have only long-distance applications.
Fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
Optical fiber is more advantageous over existing copper wire in long-distance and high-demand applications due to its excellent operating characteristics.
Fiber-optic communication systems are effective kind of wire communication but are not commonplace for their complexity and expensiveness.

Вопрос № 976059

Прочитайте текст и выполните задания.
Fiber-optic communication
1. In fiber-optic communications information is transmitted by sending light through optical fibers. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
2. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Due to much lower attenuation and interference, optical fiber has large advantages over existing copper wire in long-distance and high-demand applications. However, infrastructure development within cities was relatively difficult and time-consuming, and fiber-optic systems were complex and expensive to install and operate.
3. Due to these difficulties, fiber-optic communication systems have primarily been installed in long-distance applications, where they can be used to their full transmission capacity, offsetting the increased cost. Since 2000, the prices for fiber-optic communications have dropped considerably.
Определите основную идею текста.
Optical fiber is more advantageous over existing copper wire in long-distance and high-demand applications due to its excellent operating characteristics.
Due to the difficulties concerning complexity and high price of fiber-optic communication systems, they have only long-distance applications.
Fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.
Fiber-optic communication systems are effective kind of wire communication but are not commonplace for their complexity and expensiveness.

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Вопрос № 893221

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Human perception of motion
1. A television system involves equipment located at the source of production, equipment located in the home of the viewer, and equipment used to convey the television signal from the producer to the viewer. The purpose of all of this equipment is to extend the human senses of vision and hearing beyond their natural limits of physical distance.
2. A television system must be designed, therefore, to embrace the essential capabilities of these senses, particularly the sense of vision. The aspects of vision that must be considered include the ability of the human eye to distinguish the brightness, colours, details, sizes, shapes, and positions of objects. Aspects of hearing include the ability of the ear to distinguish the pitch, loudness, and distribution of sounds.
3. In working to satisfy these capabilities, television systems must strike appropriate compromises between the quality of the desired image and the costs of reproducing it. They must also be designed to override, within reasonable limits, the effects of interference and to minimize visual and audial distortions in the transmission and reproduction processes.
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Вопрос № 893222

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How smartphones work
1. Thinking of a daily task it's likely there's a specialized, pocket-sized device designed to help you accomplish it. You can get a separate, tiny and powerful machine to make phone calls, keep your calendar and address book, entertain you, play your music, give directions, take pictures, check your e-mail, and do countless other things. But how many pockets do you have? Handheld devices become as clunky as a room-sized supercomputer when you have to carry four of them around with you every day.
2. A smartphone is one device that can take care of all of your handheld computing and communication needs in a single, small package. It's not so much a distinct class of products as it is a different set of standards for cell phones to live up to.
3. Unlike many traditional cell phones, smartphones allow individual users to install, configure and run applications of their choosing. A smartphone offers the ability to conform the device to your particular way of doing things. Most standard cell-phone software offers only limited choices for re-configuration, forcing you to adapt to the way it's set up.
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Вопрос № 893223

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Hyperinflation
1. Inflation is a sustained increase in the aggregate price level. Economists generally reserve the term hyperinflation to describe episodes where the monthly inflation rate is greater than 50 per cent.
2. Hyperinflations are largely a twentieth-century phenomenon. The most widely studied hyperinflation occurred in Germany after World War I. The ratio of the German price index in November 1923 to the price index in August 1922 – just fifteen months earlier – was 1.02 × 1010. This huge number amounts to a monthly inflation rate of 322 per cent.
3. Hyperinflations are caused by extremely rapid growth in the supply of «paper» money. They occur when the monetary and fiscal authorities of a nation regularly issue large quantities of money to pay for a large stream of government expenditures. In effect, inflation is a form of taxation where the government gains at the expense of those who hold money whose value is declining. Hyperinflations are, therefore, very large taxation schemes.
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Вопрос № 893224

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Insurance
1. Insurance plays a central role in the functioning of modern economies. Life insurance offers protection against the economic impact of an untimely death; health insurance covers the sometimes extraordinary costs of medical care; and bank deposits are insured by the federal government. In each case a small premium is paid by the insured to receive benefits should an unlikely but high-cost event occur.
2. An understanding of insurance must begin with the concept of risk, or the variation in possible outcomes of a situation. A shipment of goods to Europe might arrive safely or might be lost in transit. A person may incur zero medical expenses in a good year, but if he is struck by a car, they could be upward of $100,000.
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