问题详情

(5.2)B支座的竖直方向支座反力FRB =(  )(2分)


<span lang、"EN-US">20kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>

<span lang、"EN-US">20kN</span><span>(</span><span lang="EN-US">↓</span><span>)</span>

<span lang、"EN-US">40kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>

时间:2021-07-17 19:05 关键词:

答案解析

<span lang="EN-US">40kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>