当前学科:船舶动力装置
  • 题目: 单选
    The energy for pushing this piston up can be supplied from (), so that the piston can keep moving up and down.

      A . the same piston
      B . the piston nearby
      C . the other pistons
      D . the generators on board

    答案: <查看本题扣1积分>

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