土木工程力学（本）
一、单项选择题（每小题3分，共30分）
下图所示结构弯矩图的正确形状是（）
<img style="vertical-align: middle; display: block; margin-left: auto; margin-right: auto;"
src="/pluginfile.php/1008597/question/question text/6967138/2/1801510/1-01-00.jpg" alt="" width="127"
height="121" />
A.<img
src="/pluginfile.php/1008597/question/answe r/6967138/2/4163409/1-01-B.jpg" alt="" width="113" height="103"
/>
B.<img
src="/pluginfile.php/1008597/question/answe r/6967138/2/4163408/1-01-A.jpg" alt="" width="113" height="103"
/>
C.<img
src="/pluginfile.php/1008597/question/answe r/6967138/2/4163410/1-01-C.jpg" alt="" width="113" height="103"
/>
D.<img
src="/pluginfile.php/1008597/question/answe r/6967138/2/4163411/1-01-D.jpg" alt="" width="116" height="97"
/>
答案：C.
求图示结构AB两点的相对线位移，虚设力状态为图（）
<img
src="/pluginfile.php/1008597/question/question text/6967138/3/1801518/2-04-00.png" alt="" width="123"
height="101" />
A.<img
src="/pluginfile.php/1008597/question/answe r/6967138/3/4163435/d.png" alt="" width="167" height="148" />
B.<img
src="/pluginfile.php/1008597/question/answe r/6967138/3/4163433/b.png" alt="" width="163" height="148" />
C.<img
src="/pluginfile.php/1008597/question/answe r/6967138/3/4163432/a.png" alt="" width="163" height="148" />
D.<img
src="/pluginfile.php/1008597/question/answe r/6967138/3/4163434/c.png" alt="" width="167" height="148" />
答案：C.
图示简支梁中间截面的弯矩为（）
<img
src="/pluginfile.php/1008597/question/question text/6967138/4/1801522/3-03-00.jpg" alt="" width="211"
height="123" />。