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负载上电压与电流的相位差与其阻抗角的关系是【】。

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Which answer about reasons to go global is true?

A. Market Opportunity: Most target customers are outside home country
B. Customer Need: Target Customers are global
C. Vision: Leaders want to build a global company
D. Ability to Execute: leaders have unique global skills and networks
E. All of the above

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负载上电压与电流的相位差与其阻抗角的关系是【】。

瞬时功率在一个周期内的平均值叫做【】 功率，也叫【】功率。

RLC串联谐振电路的品质因数Q越_【】__，选择性越好。

当某端口处于谐振状态时，该端口的无功功率Q=【】。

Which answer about reasons to go global is true?

瞬时功率在一个周期内的平均值叫做【】功率，也叫【】功率。