轮机英语【二三管】题库

单选题 1分

Particulate matter(PM)is a complex mixture of inorganic无机 and organic 有机compounds resulting from ___...

Particulate matter(PM)is a complex mixture of inorganic无机 and organic 有机compounds resulting from ____, partly unburned lube oil, thermal splitting of HC from the fuel and lube oil,ash in the fuel and lube oil,sulphate and water.
  • A.incomplete combustion
  • B.over combustion
  • C.purification
  • D.contamination
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