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1. 速度的定義:在勻速直線運動中,速度等於物體在單位時間內透過的路程.公式:速度的單位是:米/秒;千米/小時.1米/秒=3.6千米/小時2. 平均速度:在變速運動中,用總路程除以所用的時間可得物體在這段路程中的快慢...
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