功率的定義為：單位時間(s)內所作的功(N × m)；由此可知下列何者為功率的單位？(A)N． s (B)N． m． s (C)(D)

問題詳情

3. 功率的定義為：單位時間(s)內所作的功(N × m)；由此可知下列何者為功率的單位？
(A)N． s
(B)N． m． s
(C)
(D)

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