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" />
内容
- 0
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" />
- 1
已知串联支路为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/65b91bc067d14873a38d0c4675b53329.png"/> ， ，则其传递函数为（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/8bc361d7b437451dac5c0c42c3213311.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/7db9751653e24eba9f152b6937c8c256.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/a4b7ab7e122b40068ce6b78635486bae.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/a6b34e5a8a764d5c9b78c725d7b77ed4.png"/>
- 2
麦克斯韦方程组中反映变化的电场会产生磁场的方程是： A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/38da5aa0519d43898297268ddfaaa323.PNG" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/a75feba71b8e4526abaa3cc442e36cea.PNG" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/fb2f3ac54a4d4b4f89249b1d4f7a24f7.PNG" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/60922d607c0f4c7f9fdedab0c625b6fd.PNG" />
- 3
下面哪个图形是分流阀的图形符号： A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/4a427ac6ca3a451d88b23ac3bd534502.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/bef6c57a0c1c4d6bbfc50082f7edfe14.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/750259c8aa1c4efdb338873df39ffe24.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/5d511af88d8349f1bcf5e8ae6d7b1d09.png" />
- 4
下面哪个图形是单向节流阀的图形符号： A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/a6a8cd2754284a2dbbb22ed1164736bc.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/d1dca210876d4d9baa6077b41097b205.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/4a5e042e639c49b8a1c3284a5eff710c.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/7590faf536564e61a311aa76c9807fc3.png" />