计算图a所示刚架在图示荷载作用下E点的水平位移 。各杆EI相同，均为常数。 解：作荷载作用下的图和单位荷载作用下的图如图b、c所示。   （     ）（→）  

<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/267920/27/246910/12-04-A.png" alt="" width="37" height="44">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/267920/27/246911/12-04-B.png" alt="" width="37" height="44">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/267920/27/246912/12-04-C.png" alt="" width="45" height="44">

<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/267920/27/246913/12-04-D.png" alt="" width="45" height="44">