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关于圆周运动,下列说法正确的是______。 (20)

单选题
2021-09-08 14:13
A、加速度的方向一定指向圆心
B、加速度的方向一定和速度的方向垂直
C、加速度的方向一定不指向圆心
D、法向加速度的方向一定指向圆心
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正确答案
D

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