问题详情

(1.1)B支座的支座反力FRB =(  )(4分)


<span lang、"EN-US">2kN </span><span>(</span><span lang="EN-US">↓</span><span>)</span>

<span lang、"EN-US">2kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>

<span lang、"EN-US">4kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>

<span>4kN</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">2kN</span><span>(</span><span lang="EN-US">↑</span><span>)</span>