单选题 1分

A diesel engine is turned at normal cranking speed and no ignition occurs. This could be the result ...

A diesel engine is turned at normal cranking speed and no ignition occurs. This could be the result of ____.
  • A. low lube oil temperature
  • B. low starting air temperature
  • C. air bubbles in the fuel oil system
  • D. water in the starting air system

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