A person walks first at a constant speed of 5m/s along the straight line from point A to point B, an

2024/06/2509:14:05 hotcomm 2649
A person walks first at a constant speed of 5m/s along the straight line from point A to point B, an - DayDayNews A person walks first at a constant speed of 5m/s along the straight line from point A to point B, an - DayDayNews
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