search in their own right; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate, and reflect on, the wider geological picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, where as the amateurs have tended either to remain in local societies or to come together nationally in a different way.
Although the process of professionalisation and specialisation was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however, the nineteenth century must be reckoned as the crucial period for this change in the structure of science.
51. The growth of specialisation in the 19th century might be more clearly seen in sciences such as ________.
[A] sociology and chemistry
[B] physics and psychology
[C] sociology and psychology
[D] physics and chemistry
52. We can infer from the passage that ________.
[A] there is little distinction between specialisation and professionalisation
[B] amateurs can compete with professionals in some areas of science
[C] professionals tend to welcome amateurs into the scientific community
[D] amateurs have national academic societies but no local ones
53. The author writes of the development of geology to demonstrate ________.
[A] the process of specialisation and professionalisation
[B] the hardship of amateurs in scientific study
[C] the change of policies in scientific publications
[D] the discrimination of professionals against amateurs
54. The direct reason for specialisation is ________.
[A] the development in communication
[B] the growth of professionalisation
[C] the expansion of scientific knowledge
[D] the splitting up of academic societies
passage 2
A great deal of attention is being paid today to the so-called digital divide — the division of the world into the info(information) rich and the info poor. And that divide does exist today. My wife and I lectured about this looming danger twenty years ago. What was less visible then, however, were the new, positive forces that work against the digital divide. There are reasons to be optimistic.
There are technological reasons to
[责任编辑:bulesky]
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