信号
通过单位冲激响应是
的LTI系统，
，下列说法错误的是？
A: 如果对h（t）进行换元反转及时移操作，则卷积积分的被积函数是1+T-t
B: 求0＜t＜1时的y（t）时，卷积积分的积分区间为（0，t）
C: 当1＜t＜2时，
D: 当t＜0或t＞2时，y（t）=0
通过单位冲激响应是的LTI系统，，下列说法错误的是？A: 如果对h（t）进行换元反转及时移操作，则卷积积分的被积函数是1+T-t
B: 求0＜t＜1时的y（t）时，卷积积分的积分区间为（0，t）
C: 当1＜t＜2时，
D: 当t＜0或t＞2时，y（t）=0
举一反三
- x(t)的频谱为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/5bcfe4175fcb4fabbdb5f40d00b5343e.png"/>，则<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/45b1670ebd6245ff99cc376a8048a645.png" />的频谱为（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/09bc7326832a4a1fba983e74c6d85d35.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/95fca346a74e4a6cbba601cd6d9e26bf.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/6bf6b83111ad45efac7eb9a37a245c68.png"/> D: 其余选项都不对
- 一个线性时不变系统h（t）的频率响应为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/25432d5065c84a3e957575e1b8d98f8f.png"/>，若其输入为x（t），假设x（t）任意阶可导，则下述说法正确的是？ A: 其余选项说法均不对 B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/c7e9cb6c872844fbba4c69291f3b3f98.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/30a8c5018a0e4a0b8ad7857df435bfe7.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/f27cb2a420b440ab8c30ca71dc132bc5.png"/>
- 历史曲线构件的图标是( )。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/dfb6b619f35547c590f6e6c6aab95b3f.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/e7e0aaa5f6e84ba89410cc93b06a451a.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/354425393230484ab64d64a718bd9bad.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/1f794e99ed004e3190fa5181c32fe4e8.png" />
- 下列方程所描述的系统中（ ）是线性时不变系统。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/5740348e23d246eebda0442284882d6d.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/87c5df9c28f54b398bbedc5da45e7a02.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/ece1036e5a3c410e8f8b3de147910c04.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/69fc98a558ce4f3eb743c68be74cf923.png"/>
- 下面的表达式中，正确有？ A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/0e169fdf5e354dd4af80ea6386ddeca5.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/5124889b558b4186ba4140ca7692d717.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/f3d2d0d80b744f74899371cae0395a71.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/2af6ef9203e94ea2b993e1ad4d99e5d2.png"/>