2. You stand on a spring scale on the floor of an elevator. Of the following, the scale shows the highest reading when the elevator:
(A) moves downward with decreasing speed
(B) moves downward with increasing speed
(C) moves upward with decreasing speed
(D) moves upward at constant speed
(E) remains stationary.
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統計: 尚無統計資料
統計: 尚無統計資料