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【单选题】
根据牛顿第一定律,下列说法中正确的是( )。A.
静止的物体一定不受其他物体的作用
B.
物体受力才会运动，当外力停止作用后，物体会慢慢停下来
C.
物体运动状态发生变化，物体一定受到外力作用
D.
物体不受力的作用，运动状态也能改变
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A.
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