在下列有关压杆临界应力的结论中，（ ）是正确的。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/1ac2a633c4504db598bb37cdc8facd01.png
举一反三
- 若表示压杆的临界应力，为压杆材料的比例极限，则下列结论中哪些是正确的？http://image.zhihuishu.com/zhs/onlineexam/ueditor/201710/c4abd910581b4748a161fff63012a6c8.png
- 若 表示压杆的临界应力， 为压杆材料的比例极限，则下列结论中哪些是正确的？http://image.zhihuishu.com/zhs/onlineexam/ueditor/201710/c4abd910581b4748a161fff63012a6c8.png
- 三种受压杆如图，杆1、杆2与杆3中的最大压应力（绝对值）分别为 、和，下列四种答案正确的是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/336dbe9c242b44e8a28234f259519ec7.png
- 已知<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/43114282e941476ba93775909fb3f237.png"/>，用拉氏变换法求解微分方程<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/0db291610cb64fa8ad46ae0bd15476b0.png"/> 的结果为（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/29ff68f02bdd438bb2e16c2a6e1ec18b.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/0010c1593c9145a4b928548ab38cf426.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/1f562f2536584121b53c30e4db08df88.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/f593399cb630435192baa8b3e871b533.png"/>
- 已知系统和初始条件<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/15eb73651c0a4ae094e6de902b6c21ca.png" />求初始状态激励的响应 ( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/d016acd038b04b699e76c2354357c3d2.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/7a10be8f1ce74599a610fd0b9b9eb195.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/4621f442538946fdb897b89a1461e1e1.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/61b797beffc74a99b91e1934af1372fb.png" />