GRE出国考试北美试题(17)
25.In an attempt to reverse the deterioration of the postal service in at least some respects, the government has raised the price of postage stamps. This effort will be effective since reducing the number of persons using the postal system should result in a corresponding reduction in the percentage of letter lost.The author of the passage above makes which of the following assumptions?
Ⅰ. Fewer people will buy postage stamps if they are more expensive.
Ⅱ. The percentage of letters lost by the postal service has been evidence of the deterioration of the postal system.
Ⅲ. The government will improve the efficiency of the postal service with revenues from higher priced stamps.
(A) Ⅰonly考试用书
(B) Ⅱ only
(C) Ⅲ only
(D) Ⅰand Ⅱ only
(E) Ⅰand Ⅲ only
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