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Sparrow Airlines is planning to reduce its costs by cleaning its planes' engines once a month, rather than the industry standard of every six months. With cleaner engines, Sparrow can postpone engine overhauls, which take planes out of service for up to 18 months. Furthermore, cleaning an engine reduces its fuel consumption by roughly 1.2 percent.

The airline's plan assumes that

【选项】the cost of monthly cleaning of an airplane's engines is not significantly greater in the long run than is the cost of an engine overhaul

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:OG20-语文分册-135
难度: 难