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题库 / GMATLA-CR-20
In the past the country of Siduria has relied heavily on imported oil. Siduria recently implemented a program to convert heating systems from oil to natural gas. Siduria already produces more natural gas each year than it burns, and oil production in Sidurian oil fields is increasing at a steady pace. If these trends in fuel production and usage continue, therefore, Sidurian reliance on foreign sources for fuel should decline soon.
Which of the following is an assumption on which the argument depends?
In Siduria the rate of fuel consumption is rising no more quickly than the rate of fuel production.
Domestic production of natural gas is rising faster than is domestic production of oil in Siduria.
No fuel other than natural gas is expected to be used as a replacement for oil in Siduria.
Buildings cannot be heated by solar energy rather than by oil or natural gas.
All new homes that are being built will have natural-gas-burning heating systems.
相当于方案推理
方案：usage and trends in fuel production
目的：reliance on foreign sources for fuel should decline soon
A：在锡杜里亚，燃料消耗量的增长并不比燃料产量的增长快。
直接提到总fuel消耗和产量的供需变化，最综合！其他选项要么片面，要么无关
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