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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 (61) As was discussed before, it was not (62) the 19th century that the newspaper became the dominant pre-electronic (63) , following in the wake of the pamphlet and the book and in the (64) of the periodical. It was during the same time that the communications revolution (65) up, beginning with transport, the railway, and leading (66) through the telegraph, the telephone, radio, and motion pictures (67) the 20th-century world of the motor car and the air plane. Not everyone sees that process in (68) . It is important to do so. It is generally recognized, (69) , that the introduction of the computer in the early 20th century, (70) by the invention of the integrated circuit during the 1960s, radically changed the process, (71) its impact on the media was not immediately (72) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (73) , with display becoming sharper and storage (74) increasing. They were thought of, like people, (75) generations, with the distance between generations much smaller. It was within the computer age that the term "information society" began to be widely used to describe the context within which we now live.
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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 (61) As was discussed before, it was not (62) the 19th century that the newspaper became the dominant pre-electronic (63) , following in the wake of the pamphlet and the book and in the (64) of the periodical. It was during the same time that the communications revolution (65) up, beginning with transport, the railway, and leading (66) through the telegraph, the telephone, radio, and motion pictures (67) the 20th-century world of the motor car and the air plane. Not everyone sees that process in (68) . It is important to do so. It is generally recognized, (69) , that the introduction of the computer in the early 20th century, (70) by the invention of the integrated circuit during the 1960s, radically changed the process, (71) its impact on the media was not immediately (72) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (73) , with display becoming sharper and storage (74) increasing. They were thought of, like people, (75) generations, with the distance between generations much smaller. It was within the computer age that the term "information society" began to be widely used to describe the context within which we now live.
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 (61) As was discussed before, it was not (62) the 19th century that the newspaper became the dominant pre-electronic (63) , following in the wake of the pamphlet and the book and in the (64) of the periodical. It was during the same time that the communications revolution (65) up, beginning with transport, the railway, and leading (66) through the telegraph, the telephone, radio, and motion pictures (67) the 20th-century world of the motor car and the air plane. Not everyone sees that process in (68) . It is important to do so. It is generally recognized, (69) , that the introduction of the computer in the early 20th century, (70) by the invention of the integrated circuit during the 1960s, radically changed the process, (71) its impact on the media was not immediately (72) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (73) , with display becoming sharper and storage (74) increasing. They were thought of, like people, (75) generations, with the distance between generations much smaller. It was within the computer age that the term "information society" began to be widely used to describe the context within which we now live.
Topic：The Development of the Internet
There is no question that the old style of air pollution could kill people. In one week following the infamous "peasouper" fog in December 1952, 4,700 people died in London. Most of these people were elderly and already had heart or lung diseases. A series of these killer fogs eventually led to the British Parliament passing the Clean Air Act which restricted the burning of coal. Fortunately the effect of smog on the lungs is not so dramatic. Scientists have now conducted a number of laboratory experiments in which volunteers are exposed to ozone inside a steel chamber for a few hours. Even at quite low concentrations there is a reversible fall in lung function, an increase in the irritability of the lungs and evidence of airway inflammation (发炎). Although irritable and inflamed lungs are particularly seen in people with asthma (哮喘) and other lung diseases, these effects of ozone also occur in healthy subjects. Similar changes are also seen after exposure to nitrogen dioxide, although there is some disagreement about the concentration at which they occur. Other studies have found that people living in areas with high levels of pollution have more symptoms and worse hung function than those living in areas with clean air. Groups of children attending school camps show falls in lung function even at quite low concentrations of ozone. There is also a relationship between ozone levels and hospital admissions for asthma, both in North America and Australia. It is suspected that long-term exposure to smog may result in chronic bronchitis (支气管炎) and emphysema (肺气肿), but this has yet to be proven. Recently an association has been found between the levels of particles in the air and death rates in North American cities. The reason for this association is not understood and as yet there is no evidence this occurs in Australia. However, we do know that hazy days are associated with more asthma attacks in children. In the last sentence of the third paragraph, the word "suspected" can be best replaced by______.
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