第4题: [单项选择]What is e-books' negative impact on social relationships A. They create new jobs only for writers. B. Fewer and fewer people have access to new technology. C. They may threaten some traditional trades. D. They isolate people from one another. 参考答案:C 答案解析:本题为细节理解题。文章第二段第一句指出电子书将会displace workers in print book production and traditional publishing,即“取代传统的