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The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.A.fed from mechanical lubricatorsB.thrown off from the main bearingsC.supplied from wick fed drip lubricatorsD.flow from a centrifugal

题目

The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.

A.fed from mechanical lubricators

B.thrown off from the main bearings

C.supplied from wick fed drip lubricators

D.flow from a centrifugal or banjo oiler

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更多“The upper piston rings m large, slow－speed, two－stroke／cycle diesel engines are most effec ”相关问题

  • 第1题：

    1、（）在西门子802D系统中指的是平面铣削循环。

    A．CYCLE71

    B．CYCLE73

    C．CYCLE95

    D．CYCLE81


    A

  • 第2题：

    （）在西门子802D系统中指的是轮廓铣削循环。

    A．CYCLE72

    B．CYCLE73

    C．CYCLE95

    D．CYCLE81


    A

  • 第3题：

    设 str = 'python' ，想把字符串的第一个字母大写，其他字母还是小写，正确的选项是（）

    A．print(str[0].upper()+str[1:])

    B．print(str[1].upper()+str[-1:1])

    C．print(str[0].upper()+str[1:-1])

    D．print(str[1].upper()+str[2:])


    A

  • 第4题：

    （）在西门子802D系统中指的是平面铣削循环。

    A．CYCLE71

    B．CYCLE73

    C．CYCLE95

    D．CYCLE81


    A

  • 第5题：

    2、（）在西门子802D系统中指的是轮廓铣削循环。

    A．CYCLE72

    B．CYCLE73

    C．CYCLE95

    D．CYCLE81


    A

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