2．梁AB 的自重不计，试作出图示简支梁AB 的受力图。（5分）

<img src、"http://sichuan.ouchn.cn/pluginfile.php/56687/question/answer/371679/25/224055/01.png" alt="" width="284" height="144">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/56687/question/answer/371679/25/224056/02.png" alt="" width="248" height="163">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/56687/question/answer/371679/25/224057/03.png" alt="" width="275" height="165">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/56687/question/answer/371679/25/224058/04.png" alt="" width="276" height="138">