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关于降压药物的使用 司机、高空作业和精密仪器操作者不宜应用的是
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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 (62) . As was discussed before, it was not (63) the 19th century that the newspaper became the dominant pre-electronic (64) , following in the wake of the pamphlet and the book and in the (65) of the periodical. It was during the same time that the communications revolution (66) up, beginning with transport, the railway, and leading (67) through the telegraph, the telephone, radio, and motion pictures (68) the 20th-century world of the motor car and the airplane. Not everyone sees that process in (69) . It is generally recognized, (70) , that the introduction of the computer in the early 20th century, (71) by the invention of the integrated circuit during the 1960s, radically changed the process, (72) its impact on the media was not immediately (73) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (74) , with display becoming sharper and storage (75) increasing. They were thought of, like people, (76) generations, with the distance between genera-much (77) . It was within the computer age that the term "information society" began to be widely used to describe the (78) within which we now live. The communications revolution has (79) both work and leisure and how we think and feel both about place and time, but there have been (80) views about its economic, political, social and cultural implications. "Benefits" have been weed (81) "harmful" outcomes: And generalizations have proved difficult.
Questions 22 to 25 are based on the passage you have just heard.
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 (62) . As was discussed before, it was not (63) the 19th century that the newspaper became the dominant pre-electronic (64) , following in the wake of the pamphlet and the book and in the (65) of the periodical. It was during the same time that the communications revolution (66) up, beginning with transport, the railway, and leading (67) through the telegraph, the telephone, radio, and motion pictures (68) the 20th-century world of the motor car and the airplane. Not everyone sees that process in (69) . It is generally recognized, (70) , that the introduction of the computer in the early 20th century, (71) by the invention of the integrated circuit during the 1960s, radically changed the process, (72) its impact on the media was not immediately (73) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (74) , with display becoming sharper and storage (75) increasing. They were thought of, like people, (76) generations, with the distance between genera-much (77) . It was within the computer age that the term "information society" began to be widely used to describe the (78) within which we now live. The communications revolution has (79) both work and leisure and how we think and feel both about place and time, but there have been (80) views about its economic, political, social and cultural implications. "Benefits" have been weed (81) "harmful" outcomes: And generalizations have proved difficult.
C In the past 200 years, Australia has lost 19 species (种类) of animals and 76 species of plants. The Australian National Parks and Wildlife Service estimates that between 100 and 250 million species of animals and plants have lived on Earth since life began about 3.5 million years ago. Today, there are between 5 and 10 million species, of which up to 1 million or more species could be extinct (灭绝) by the year 2010. Today the council of state and federal ministers responsible for nature conservation (保护) has produced a list of currently endangered vertebrate fauna (脊椎动物). Three species of whale, various birds, a number of frogs, snakes and fish are also on the list. But there is some cause for optimism (乐观). Several species previously believed extinct have reappeared in recent years. This could mean that other "extinct" species may yet surface--even the Tasmanian tiger, which some authorities believe still exists in the remote regions of Tasmania. This passage mainly focuses on ______.
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