则是其能控规范形实现的为（）。A:
B:
C:
D:
举一反三
- 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"/>
- 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" />
- 下面状态空间描述是能控规范形的是（）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/c0f8e3a2d77a4fd08b4ada9a5b324293.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/8d770c43b50544c08938c1b531fb582b.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/e7ba776f14894872b1c52d35b99ac85b.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/cc8e514019f84f9ea16e37a59b1a3bb1.png" />
- 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" />
内容
- 0
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" />
- 1
给定一个连续时间线性时不变系统，已知，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/bdfabdb79f554a658d36ec905432ec8b.png" />,输入为单位阶跃函数，则状态响应为（）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/2064d85499a24636b401e8009542e903.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/b1b274bff09b4481b761a6aa2281fff2.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/5cc7424992b644e49f5b93aa85e59b8a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/cb648b20892848869052d705c0e68156.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
假设面心立方晶体的晶胞参数为a，则（111）面的原子密度为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/868b8bc10dea4b11a7056f990d67b8ea.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/29d88b05cb5b42909a7b9d27f13b8fcd.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/c178174fcfcc485395dca41757c07354.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/5b6326521871496ea8f698ef4da926f7.png">
- 4
下面说法正确的是（ABD）。 A: 对给定的n×n常值矩阵A，有<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/303dacf53d6143c2b28f05f011cccd4d.png" /> B: 当A为对角线矩阵，即A=diag{<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/c6add3ff591a49618a099f987b66ac9b.png" />}时，有<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/daf51358ae6a4eefbdd513874b1f0024.png" /> C: 当A具有如下形式<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/d35669dfbff8484ea1da422c1c05a134.png" />,有<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/122dc0b2302840628b70f41d6200c101.png" /> D: 当A具有如下形式<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/061f1e154a43492c846419cd29919f63.png" />,有<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/fe069d53e0c74e3f863b774fd4c94ad0.png" />