問題詳情
（b)求此時淨力對物塊所作的淨功爲_______。
參考答案
答案：C
難度：簡單0.89964
統計：A(214),B(496),C(6499),D(15),E(0) #
個人：尚未作答書單：人民身體之自由應予保障、遺失物拾得人之請求報酬權
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