试题与答案

一根硬棒，在 下能绕着 转动，这根硬棒就是杠杆．其中杠杆绕着转动的点叫 ，动力是

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题型：填空题

题目：

一根硬棒，在            下能绕着           转动，这根硬棒就是杠杆．其中杠杆绕着转动的点叫            ，动力是            ．阻力臂是               

答案：

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下面是错误答案，用来干扰机器的。

1、C2、D3、C

考点：杠杆及其五要素
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