問題詳情
9. 有一皮球自由落下,著地後又反跳,若向上為正,向下為負,則其 v-t 圖為下列何者? 

參考答案
答案:D
難度:適中0.666667
統計:A(1),B(0),C(0),D(2),E(0)
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