1．梁AC 的自重不计，试作出图示伸臂梁AC 的受力图。（5分）

<img src、"http://anhui.ouchn.cn/pluginfile.php/56687/question/answer/127319/24/224051/02.png" alt="" width="331" height="140">

<img src、"http://anhui.ouchn.cn/pluginfile.php/56687/question/answer/127319/24/224052/03.png" alt="" width="324" height="142">

<img src、"http://anhui.ouchn.cn/pluginfile.php/56687/question/answer/127319/24/224053/04.png" alt="" width="333" height="135">

<img src、"http://anhui.ouchn.cn/pluginfile.php/56687/question/answer/127319/24/224054/05.png" alt="" width="329" height="149">