OSI is a theoretical model that shows how any two different systems can communicate with each other. Router, as a networking device, operate at the()layer of the OSI model.
The traditional distinction between products that satisfy needs and those that satisfy wants is no longer adequate to describe classes of products. In today’s prosperous societies the distinction has become obscure because so many wants have been turned into needs. A writer, for instance, can work with paper and pencils. These are legitimate needs for the task. But the work can be done more quickly and efficiently with a word processor. Thus a computer is soon viewed as a need rather than a want.
In the field of marketing, consumer goods are classed according to the way in which they are purchased. The two main categories are convenience goods and shopping goods. Two lesser types are specialty goods and unsought goods. It must be emphasized that all of these types are based on the way shoppers think about products, not on the nature of the products themselves. What is regarded as a convenience item in France (wine, for example) may be a specialty good in the United
A. that satisfy similar needs of the consumer.
B. that consumers don't care where to buy them.
C. that consumers spend much time to look for.
D. that can be found in nearly every shop.
Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened (21) . As was discussed before, it was not (22) the 19th century that the newspaper became the dominant pre-electronic (23) , following in the wake of the pamphlet and the book and in the (24) of the periodical. It was during the same time that the communications revolution (25) up, beginning with transport, the railway, and leading (26) through the telegraph, the telephone, radio, and motion pictures (27) the 20th-century world of the motor car and the air plane. Not everyone sees that process in (28) . It is important to do so.
It is generally recognized, (29) , that the introduction of the computer in the early 20th century, (30) by the invention of the integrated circuit during the 1960s, radically changed the process, A. regarded
B. impressed
C. influenced
D. effected
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