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单选题 
计算结果为
A. 
C. 
D. 
学科：信号与系统
时间：2024-04-23 11:39:00
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题目1单选题
门信号<img src="https://tihai-oss-cloud.itihey.com/img/0169734c2aab1f99529c4b43309ebbc5.webp">可由单位阶跃信号<img src="https://tihai-oss-cloud.itihey.com/img/2c9178374a0457b3902867afaa4c7125.webp">表示,下列表示正确的是A. <img src="https://tihai-oss-cloud.itihey.com/img/d41d197985d4ae10f9375d176e08f03c.webp">B. 以上均不正确C. <img src="https://tihai-oss-cloud.itihey.com/img/febd74a6aa7571936c4928f635ffca98.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/0563ecbffc66a13d157b5f03ad714e4a.webp">
题目2单选题
单位冲激信号<img src="https://tihai-oss-cloud.itihey.com/img/012d5d4a85b31076bf77a43c2e367725.webp">具有抽样特性,下面计算错误的是A. <img src="https://tihai-oss-cloud.itihey.com/img/5e39725d8f649fa6edde30099a513dff.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/9d1315e28a93674cc717861a481aa49c.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/9abe95c8f881aaae4a3c6d2952771ecf.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/d0f556518f7e68002ea24309baa84f8b.webp">
题目3单选题
根据单位冲激信号的定义<img src="https://tihai-oss-cloud.itihey.com/img/0caa890a845ecc7e0ddbafd13d5e1abb.webp">以及冲激信号的抽样性,下面各式正确的是A. <img src="https://tihai-oss-cloud.itihey.com/img/ae7f43c809650ab3c3d0abd89c7cc7e4.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/d3b90cde430a6208849ebd50bcbb7827.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/93fe77e349c97e8dcbb3054ca97682d7.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/3ab5a1b897a633fc4a905f13d4231137.webp">
题目4单选题
两个任意信号的卷积为A. <img src="https://tihai-oss-cloud.itihey.com/img/c037f97c4cc9405e657bf01e11958165.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/1dfdb736f826d007970f34ca29cce57d.webp">C. 以上都不正确D. <img src="https://tihai-oss-cloud.itihey.com/img/6c0434514d5a5ca06f641ea1c0685c68.webp">
题目5单选题
根据卷积性质,下列正确的是A. <img src="https://tihai-oss-cloud.itihey.com/img/0a00295e8e2c92124cd39266145e789f.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/6e90701242e117fdbca0751408c61a88.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/2ea26f74b0776a927e2649a10d4e0f4e.webp">D. 以上都不正确
题目6单选题
下列卷积运算正确的是A. <img src="https://tihai-oss-cloud.itihey.com/img/89e6c9202cf7f621b3c48cb2bc15fc78.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/e8d0afcff77a1348f018fedf9d3dc87a.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/9a1d99a849a78519cc4fd1eacf849058.webp">D. 以上都不正确
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/4356b3a6a38a766f55b9ddc30491d986.webp">计算结果为A. <img src="https://tihai-oss-cloud.itihey.com/img/384758410bccbdb1e5f1da1c88613849.webp">B. 以上都不正确C. <img src="https://tihai-oss-cloud.itihey.com/img/a806b3db4db68150ad5cf5ad5dd80732.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/786cc0a193b551b5f6dc521696275407.webp">
题目8单选题
当<img src="https://tihai-oss-cloud.itihey.com/img/640727e56d69d8d2d55cb03f4347ff1a.webp">时,单位抽样序列<img src="https://tihai-oss-cloud.itihey.com/img/e85fa556daa784e781c8c36bd899d2eb.webp">的值等于A. <img src="https://tihai-oss-cloud.itihey.com/img/2160e75c3e609072960f984de1a375df.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/01b5dd58521de58df415004d9b278eb1.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/205ab5b0b18ec3989c5269769e7a353a.webp">D. 以上都不正确
题目9单选题
当<img src="https://tihai-oss-cloud.itihey.com/img/cafdff8675064ac5253cdbc5a2de0b29.webp">时,单位阶跃序列<img src="https://tihai-oss-cloud.itihey.com/img/7773d8767ed9c9e3f26ceb0f8bc31b60.webp">的值等于A. <img src="https://tihai-oss-cloud.itihey.com/img/e971579c97bd4b3f154326a58926a62c.webp">没有定义B. <img src="https://tihai-oss-cloud.itihey.com/img/364adb4a15ed3267e515641d6cb28d25.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/3e8a4632071e02cac8013c113cbde576.webp">D. 以上都不正确
题目10单选题
下关系式错误的是A. <img src="https://tihai-oss-cloud.itihey.com/img/4f209512aab0fc3ba1d398bf6ff06dc2.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/764aa04b6f5b00e6987b8751704c07b4.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/e67159867d9a447966ea2ec0081111e5.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/74a895dd628f1277c00cadd761fd75de.webp">
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