問題詳情
19.一物體自空中靜止自由落下，其前半程和後半程的時間比為
(A)（＋1）：
(B)：
(C)（－1）：
(D)1：
(E)1：1
(A)（＋1）：
(B)：
(C)（－1）：
(D)1：
(E)1：1
參考答案
答案：A
難度：困難0.2
統計：A(2),B(0),C(0),D(3),E(3)
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