Questions 18-19fficeffice" />

The format of network television news programs generally allows advocates of a point of view only 30 seconds to convey their message. Consequently, regular watchers become accustomed to thinking of issues in terms only of slogans and catch phrases, and so the expectation of careful discussion of public issues gradually disappears from their awareness. The format of newspaper stories, on the other hand, leads readers to pursue details of stories headed by the most important facts and so has the opposite effect on regular readers—that of maintaining the expectation of careful discussion of public issues. Therefore, in contrast to regular newspaper reading, regular watching of network television news programs increases the tendency to think of public issues in oversimplified terms.

18. The argument assumes which one of the following?

(A) Viewers of network television news programs would be interested in seeing advocates of opposing views present their positions at length.

(B) Since it is not possible to present striking images that would symbolize events for viewers, and since images hold sway over words in television, television must oversimplify.

(C) It is not possible for television to present public issues in a way that allows for the nuanced presentation of diverse views and a good-faith interchange between advocates of opposing views.

(D) In network television news reports, it is not usual for a reporter to offer additional factual evidence and background information to develop a story in which opposing views are presented briefly by their advocates.（D）

(E) Television news reporters introduce more of their own biases into news stories than do newspaper reporters.

19. Which one of the following, if true, most seriously weakens the argument?

(A) Regular watchers of network television news programs are much more likely than other people to be habitual readers of newspapers.

(B) Including any 30-second quotations from proponents of diverse views, the total amount of time devoted to a single topic on regular network television news programs averages less than one and a half minutes.

(C) The format of network television news programs does not include roundtable discussion of issues among informed proponents of diverse views.

(D) Television news reports tend to devote equal time to discussion of opposing views.（A）

(E) People who watch the most television, measured in average number of hours of watching per week, tend not to be regular readers of newspapers. 我对该题理解得不是很清楚，请NN们给我讲一下18题该怎样理解 ，万分感谢！！[em24]

原文罗嗦了一大堆，说的就是有线电视的新闻比较简单，没有深入的讨论，而报纸上则说的很想详细，有很多背景资料的介绍咯fficeffice" />

Therefore, in contrast to regular newspaper reading, regular watching of network television news programs increases the tendency to think of public issues in oversimplified terms.

作为原文的假设，当然要找一个支持原文的咯，D说的就是电视新闻一般不提供背景资料的介绍以及深入的讨论，所以这个就是最后的答案