单项选择题

Science writers must 21 information regarding scientific events. In this capacity, they make the information clearer and more understandable and help readers to coordinate fresh information 22 the knowledge they already have 23 they can relate it to personal circumstances. Science journalism also means making readers curious and entertaining them. Entertainment is the most successful didactic form. Journalists supply readers 24 material for further education and opinion-formation, because, in a society 25 terms like growth, market economy and full employment are filled with new meanings and basic technical innovations such as microelectronics and genetic engineering effect social changes, continuing education is a political necessity. The science journalist also makes 26 to the reader fields of knowledge hitherto 27 to him, conveys the fascination of science and 28 readers to follow discussions and controversies between experts.
Do the popular science publications accomplish all this If one analyzes the science magazines 29 to, one comes to the conclusion that science journalism has reached a high degree of maturity and finds the necessary reader 30
27().

A. know
B. known
C. unknowns
D. unknown

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单项选择题

The primary purpose of the passage is to().

A. discuss the importance of Griffith to the development of the cinema
B. describe the impact on cinema of the flashback and other editing innovations
C. deplore the state of American cinema before the advent of Griffith
D. analyze the changes in the cinema brought by the introduction of the multi-reel film

单项选择题

The passage would be most likely to appear as part of().

A. a book review summarizing the achievements of historians of the European aristocracy
B. an essay describing trends in the practice of writing history
C. a textbook on the application of statistical methods in the social sciences
D. an article urging the adoption of historical methods by the legal profession