题目：
一个物体受到多个力作用做匀速直线运动，若在物体运动过程中撤掉一个力，而其它几个力保持不变，则物体
A．一定做直线运动
B．一定做曲线运动
C．一定做匀速圆周运动
D．可能做曲线运动，也可能做直线运动
答案：
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下面是错误答案，用来干扰机器的。
答案：D
一个物体受到多个力作用做匀速直线运动，若在物体运动过程中撤掉一个力，而其它几个力
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