How does current change when the time rate of charges is greater?
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How to interpret the uab = -1 volt in two ways?
What relation is between power and energy?
Why do current direction and voltage polarity play a major role in determining the characteristics of power?
如果一名队员用他的手、胳膊、腿或者身体去阻止对方队员获得球，他应该被判罚（）
A. 直接任意球
B. 间接任意球
C. 直接任意球或球点球
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