题目：
在两个或两个以上力的作用下物体保持()叫做力的平衡。
A、静止
B、匀速直线运动
C、匀速转动
D、加速直线运动
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
在两个或两个以上力的作用下物体保持()叫做力的平衡。A、静止 B、匀速直线运动 C、
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