单选题 1分

Most practical diesel engines today operate on cycle which is a combination of the Diesel and Otto c...

Most practical diesel engines today operate on cycle which is a combination of the Diesel and Otto cycles. In this process, compression ignition ______
  • A. begins on a constant volume basis
  • B. begins on a constant pressure basis
  • C. ends on a constant volume basis
  • D. begins and ends on a constant volume basis

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