1.关于做匀速圆周运动的物体，下列说法正确的是（）A.物体的线速度保持不变B.物体的加速度保持不变C.物体的周期保持不变D.物体的向心力保持不变【答案】C【解析】A选项：B选项：C选项：D选项：做匀速圆周运动的物体，线速度大小不变，方向发生改变，因...

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