图示任意形状截面，其一个形心轴xc将截面分成I和II两部分，则下列哪式一定成立（）？http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/3bf945e4103a498cb76c2ba9b87bd610.png
举一反三
- 图示任意形状截面，其一个形心轴xc将截面分成I和II两部分，则下列哪式一定成立（...b76c2ba9b87bd610.png
- 工字形截面如图所示，水平形心轴的惯性矩的答案为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/e4c76b39abd7440bbc814225f2233f2c.png
- 任意形状截面,它的一个形心轴zc把截面分成1和2两部分。在以下各式中哪一个一定成立( )
- 内外直径分别为d和D的空心圆轴，则横截面的极惯性矩和抗扭截面系数分别为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/3a9bd70d601a40fc986078c736ee534e.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/ffa8ddd27d974b72aadfbdb98196edf4.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/d4b4be29679b4e33ae4cff612d2b291c.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/ff03855cb8ba4e278973e1cfc8560323.png">
- 已知下列传递函数<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/52a69b746f6d4543a289093c286ea763.png" />则是其能控规范形实现的为（）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/5cbf894bf07b4884bd0e9a8339005832.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/063b93d5e1794cc7b2e0854e9c8d16e1.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/b02c120bde7746a68c1d324058f99bec.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/48b05a371844434b84dfa6dbae612c74.png" />