______is the speed at which something moves in a particular direction.A.VoltageB.VelocityC
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______is the speed at which something moves in a particular direction.
A.Voltage
B.Velocity
C.Proportion
D.Frequency
请帮忙给出正确答案和分析,谢谢!
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正确答案:B
名词辨析题。velocity意为“速率”,符合句意,故[B]为答案。voltage意为“电压”;proportion意为“比例;面积”;frequency意为“频率”。
