[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f-Mh1AGDC-m3v4tUG8wakzHiWbFWAgvzEuY7Vy_syrhI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-04-19 12:15:14",139133276,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2160e75c3e609072960f984de1a375df.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F01b5dd58521de58df415004d9b278eb1.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F205ab5b0b18ec3989c5269769e7a353a.webp\">","以上都不正确",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},40,"1dbdea683dd62b6454cbe7854b550455","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F59d71c300dff6ba7fa49e1ad37a4ae2d.jpg","信号与系统","5aa632c323f042bca14d3c4faecbc06c","","当\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F640727e56d69d8d2d55cb03f4347ff1a.webp\">时,单位抽样序列\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe85fa556daa784e781c8c36bd899d2eb.webp\">的值等于",[21,33,42,52,60,68,76,84,87,95],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-04-22 19:01:57",139133269,[26,27,28,29],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd41d197985d4ae10f9375d176e08f03c.webp\">","以上均不正确","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffebd74a6aa7571936c4928f635ffca98.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0563ecbffc66a13d157b5f03ad714e4a.webp\">","门信号\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0169734c2aab1f99529c4b43309ebbc5.webp\">可由单位阶跃信号\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2c9178374a0457b3902867afaa4c7125.webp\">表示,下列表示正确的是","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],139133270,[37,38,39,40],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5e39725d8f649fa6edde30099a513dff.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9d1315e28a93674cc717861a481aa49c.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9abe95c8f881aaae4a3c6d2952771ecf.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd0f556518f7e68002ea24309baa84f8b.webp\">","单位冲激信号\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F012d5d4a85b31076bf77a43c2e367725.webp\">具有抽样特性,下面计算错误的是",{"answer":43,"createTime":44,"id":45,"options":46,"question":51,"source":31,"type":32},[],"2024-04-23 19:39:00",139133271,[47,48,49,50],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae7f43c809650ab3c3d0abd89c7cc7e4.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd3b90cde430a6208849ebd50bcbb7827.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93fe77e349c97e8dcbb3054ca97682d7.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3ab5a1b897a633fc4a905f13d4231137.webp\">","根据单位冲激信号的定义\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0caa890a845ecc7e0ddbafd13d5e1abb.webp\">以及冲激信号的抽样性,下面各式正确的是",{"answer":53,"createTime":44,"id":54,"options":55,"question":59,"source":31,"type":32},[],139133272,[56,57,11,58],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc037f97c4cc9405e657bf01e11958165.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1dfdb736f826d007970f34ca29cce57d.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6c0434514d5a5ca06f641ea1c0685c68.webp\">","两个任意信号的卷积为",{"answer":61,"createTime":44,"id":62,"options":63,"question":67,"source":31,"type":32},[],139133273,[64,65,66,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0a00295e8e2c92124cd39266145e789f.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6e90701242e117fdbca0751408c61a88.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2ea26f74b0776a927e2649a10d4e0f4e.webp\">","根据卷积性质,下列正确的是",{"answer":69,"createTime":23,"id":70,"options":71,"question":75,"source":31,"type":32},[],139133274,[72,73,74,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F89e6c9202cf7f621b3c48cb2bc15fc78.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe8d0afcff77a1348f018fedf9d3dc87a.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9a1d99a849a78519cc4fd1eacf849058.webp\">","下列卷积运算正确的是",{"answer":77,"createTime":44,"id":78,"options":79,"question":83,"source":31,"type":32},[],139133275,[80,11,81,82],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F384758410bccbdb1e5f1da1c88613849.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa806b3db4db68150ad5cf5ad5dd80732.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F786cc0a193b551b5f6dc521696275407.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4356b3a6a38a766f55b9ddc30491d986.webp\">计算结果为",{"answer":85,"createTime":5,"id":6,"options":86,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":88,"createTime":44,"id":89,"options":90,"question":94,"source":31,"type":32},[],139133277,[91,92,93,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe971579c97bd4b3f154326a58926a62c.webp\">没有定义","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F364adb4a15ed3267e515641d6cb28d25.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3e8a4632071e02cac8013c113cbde576.webp\">","当\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcafdff8675064ac5253cdbc5a2de0b29.webp\">时,单位阶跃序列\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7773d8767ed9c9e3f26ceb0f8bc31b60.webp\">的值等于",{"answer":96,"createTime":44,"id":97,"options":98,"question":103,"source":31,"type":32},[],139133278,[99,100,101,102],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4f209512aab0fc3ba1d398bf6ff06dc2.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F764aa04b6f5b00e6987b8751704c07b4.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe67159867d9a447966ea2ec0081111e5.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F74a895dd628f1277c00cadd761fd75de.webp\">","下关系式错误的是"]