阅读理解细节题答题策略例题解析： 例题 •. Robert Spring spent 15 years ______. •. A. running a bookstore in Philadelphia •. B. corresponding with Miss Fanny Jackson •. C. as a forger •. D. as a respectable dealer •. Source sentence: Robert Spring, a 19th century forger,was so good at his profession that he was able to make his living for 15 years by selling false signatures of famous Americans. 例题 •. Specialization is encouraged because _________. •. A. people can use their money to buy whatever they want •. B. people do not need to make a complete product for exchange •. C. people make a great contribution to the manufacture of a product •. D. people cannot use their money to buy whatever they want •. Source sentence: Specialization, which is vital to an advanced economy, is encouraged, because people whose output is not a complete product but only a part of one in which many others are involved can be paid an amount equivalent to their share of the product. 例题 •. A barter economy is one in which __________. •. A. value is decided by weight •. B. value is decided by number •. C. money is used and goods are not exchanged •. D. goods are exchanged and money is not used •. Source sentence: In a barter economy it would be necessary to determine how many plates were worth one hundred weight of cotton, or how many pens should be exchanged for a ton of coal. which would be a difficult and time-consuming task．