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刀出鞘打一字谜
更新时间: 2021-04-07 04:32:07  

1、刀出鞘(打一汉字):力。

2、[解释] 刀出头就是力。

3、力是力学中的基本概念之一,是使物体改变运动状态或形变的根本原因。在动力学中它等于物体的质量与加速度的乘积。力是物体对物体的作用,力不能脱离物体而单独存在。两个不接触的物体之间也可能产生力的作用。力的作用是相互的。

关键词: 出鞘 字谜

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