单选题 What is the author's attitude toward the "railroad novels" and other books about railroads written between 1890 and 1920?

A、 They have as much literary importance as the books written by Emerson, Thoreau, and Adams.
B、 They are good examples of the effects industry and business had on the literature of the United States.
C、 They contributed to the weakening of traditional values.
D、 They are worth reading as sources of knowledge about the impact of railroads on life in the United States.

【正确答案】 D

【答案解析】态度题。作者对于“铁路小说”及其他写于1890至1920年间有关铁路的小说持什么态度?A项它们与Emerson，Thoreau和Adams作品的文学重要性是一样的。B项它们是工商业对美国文学影响的好例子。C项它们是传统文化削弱的一个原因。D项作为铁路对美国生活影响的信息来源，它们是值得阅读的。