图示结构 AB 杆的内力为零。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/bf5c3bb145c44afda431de3540f917cf.png
举一反三
- 图示结构C截面弯矩为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/4f75b4fba9ff4be1b04a5e100c86c65e.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/145877d7a442497f9fe1266fa394ba2e.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/1b6f8295e7bc44b0b8a2bee20e062fc4.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/18776e34a7504dfcbe40fbdf73958b14.png" /> D: 0
- 图示桁架1杆的轴力为零。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/163a758d5d0c46e78393266a6a4dafc9.png
- 图示各种结构中，欲求A点竖向位移，能用图乘法的为： A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/d50592b891f84d5781c9d2e89a13f0ce.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/190dc66109344678a1e96dc503de01ac.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/f9d4e2fd081e400695cef1cac71f1777.png" />
- 下列尺寸标注正确的是（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/79ed6f04ee2f415c917c9f280eccf07e.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/4677ac7155c849bebe9d2ffd7458f4c4.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/489ad68ff6294831bc43fa08990b59b7.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e829c514224942f1926c1823be08d3e7.png">
- 下列微分方程中常微分方程的是( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/c24b125c0b534b7696bf33f1e7b98c4c.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/2c9f694c97e9426596d13bed4bd474da.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/7ee1366ebe7a40aa868a143ba15c6ed0.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/d46e4fa33ea0443a938c267c2f07c6b4.png">