• 2022-06-29 问题

    高压电路发生三相短路时,其短路冲击电流有效值Ish的经验计算公式为()。 A: Ish=2.55IK B: Ish=1.51IK C: Ish=1.94IK D: Ish=1.09IK

    高压电路发生三相短路时,其短路冲击电流有效值Ish的经验计算公式为()。 A: Ish=2.55IK B: Ish=1.51IK C: Ish=1.94IK D: Ish=1.09IK

  • 2021-04-14 问题

    在高压系统发生三相短路时,ish= I'',Ish= I'',在低压电路和1000kVA及以下变压器二次侧发生三相短路时,ish= I'',Ish= I''。

    在高压系统发生三相短路时,ish= I'',Ish= I'',在低压电路和1000kVA及以下变压器二次侧发生三相短路时,ish= I'',Ish= I''。

  • 2022-06-06 问题

    The Start backwards key is used to _____ a program backwards.

    The Start backwards key is used to _____ a program backwards.

  • 2022-06-03 问题

    短路冲击电流ish

    短路冲击电流ish

  • 2022-06-06 问题

    Stern lines are used to prevent ship's backwards movement.

    Stern lines are used to prevent ship's backwards movement.

  • 2022-06-07 问题

    …until we are marching backwards to the glorious age of the sixteenth century

    …until we are marching backwards to the glorious age of the sixteenth century

  • 2022-06-03 问题

    短路冲击电流瞬时值ish和第一周期短路冲击电流有效值Ish各有什么不同?各有什么用途?

    短路冲击电流瞬时值ish和第一周期短路冲击电流有效值Ish各有什么不同?各有什么用途?

  • 2022-05-27 问题

    The affix “-ish” in the word boyish conveys a ____meaning.

    The affix “-ish” in the word boyish conveys a ____meaning.

  • 2021-04-14 问题

    根据1999年WHO/ISH标准,成人高血压为:

    根据1999年WHO/ISH标准,成人高血压为:

  • 2022-06-06 问题

    Stern lines are used to prevent ship's backwards movement. A: 正确 B: 错误

    Stern lines are used to prevent ship's backwards movement. A: 正确 B: 错误

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