问答题

交流电的周期用符号表示,其单位是 ;交流电的频率用符号表示,其单位是。它们的关系是。（）

答案： ["T","秒;s","f","赫兹;Hz",";"]

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电荷的形成电流,电流用符号表示,国际单位是,常用单位还有和 ______

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Equity financing means obligations to pay loan lenders or bond buyers a fixed amount of interest regardless of the firm’s financial conditions.（）

答案：错误