4. What is Klein's understanding of the age of electricity?
- A. It is closely linked to the steam age.
- B. It began earlier than proper thought.
- C. It is a little-studied period of history.
- D. It will come to an end sooner or later.
答案：A
答案句：Yet properly understood, the age of electricity is merely the second stage in the age of steam, which began a century earlier.
参考译文：然而，正确理解的话，电力时代仅仅是蒸汽时代（一个世纪前开始）的第二阶段。
定位线索：题干“Klein's understanding”→答案句“the age of electricity is merely the second stage in the age of steam”；文中“merely the second stage”对应选项A“closely linked”。
解析：题干问Klein对电力时代的理解，答案句直接指出电力时代是蒸汽时代的第二阶段，说明两者紧密相连，对应A。B项“began earlier”与原文“began a century earlier”指蒸汽时代，偷换概念；C项“little-studied”无中生有；D项“come to an end”无中生有。
5. What can be inferred about Ned?
- A. He was born in New York City.
- B. He wrote many increasing stories,
- C. He created an electricity company.
- D. He lived mainly in the 19th century.
答案：D
答案句：To frame his story, Klein creates the character of Ned, a fictional witness to the progress brought about by the steams and electric revolutions in America during one man's lifetime.
参考译文：为了构建故事，Klein创造了Ned这个角色，一个虚构的见证者，见证美国在一个人一生中蒸汽和电力革命带来的进步。
定位线索：题干“Ned”→答案句“Ned, a fictional witness”；文中“during one man's lifetime”对应选项D“lived mainly in the 19th century”。
解析：题干问关于Ned的推断，答案句说Ned是虚构的见证者，见证蒸汽和电力革命在一个人一生中的进步，蒸汽革命始于18世纪末，电力革命在19世纪，因此Ned主要生活在19世纪，对应D。A项“born in New York City”无中生有；B项“wrote stories”无中生有；C项“created an electricity company”无中生有。
6. What is the text?
- A. A biography.
- B. A book review.
- C. A short story.
- D. A science report.
答案：B
答案句：“It is curious that no one has put together a history of both the steam and electric revolutions.” writes Maury Klein in his book The Power Makers, Steam, Electricity, and the Men Invented Modem America. Klein, a noted historian of technology, spins a narrative so lively that at times it reads like a novel.
参考译文：“奇怪的是，没有人把蒸汽和电力革命的历史放在一起。”Maury Klein在他的书《权力制造者：蒸汽、电力和发明现代美国的人》中写道。Klein是一位著名的技术史学家，他讲述的故事如此生动，有时读起来像小说。
定位线索：题干“What is the text”→答案句“writes Maury Klein in his book”和“Klein...spins a narrative”；文中“book”对应选项B“book review”。
解析：文章主要介绍Maury Klein的书《权力制造者》，并评价其叙事生动，这是典型的书评，对应B。A项“biography”范围过窄，文章不是人物传记；C项“short story”无中生有；D项“science report”答非所问，文章是文学评论。