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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】engine cleaning does not remove an airplane from service

选项是否正确?

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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
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