单项选择题
A.代表传导电流的贡献,将引起电磁波的能量消耗
B.代表位移电流的贡献,将引起电磁波的能量消耗
C.代表传导电流的贡献,将引起电磁波的能量消耗
D.代表位移电流的贡献,将引起电磁波的能量消耗
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A.To facilitate control by preventing discretionary expenditure
B.To enable accurate reforecasting when actual costs are known
C.To facilitate control by establishing a budget relevant to actual activity levels
D.To ensure managers are motivated
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