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．
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