[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fpGMR_c20BgdmEbBCznxeQw5jT3he1DaTu0MP_wXhTVs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":14,"related":15,"source":25,"type":26},[],"2025-06-21 08:00:55",1068010322,[8,9,10],"0个","1个","2个",{"courseImg":12,"courseName":13},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F440432b4d1bdf58bc4d9b0f931c8a4bd.jpg","数字信号处理","用频域采样法设计一个低通数字滤波器,要求滤波器的阻带衰减需要达到60dB,那么应该在滤波器频率响应的过渡带上,至少采样几个点",[16,27,36,45,54,63,72,75,84,93],{"answer":17,"createTime":5,"id":18,"options":19,"question":24,"source":25,"type":26},[],1068010207,[20,21,22,23],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7ff7fe3162d4d46752c20aa7eb226d28.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3662beecdd2b1ed78af227e4d6f58fcc.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe849a1be6f5e88f79c2c9c9477fa3a7f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fedb9b40d9550b8dcd17136ecbfde3449.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F70984aaf008aaead354dcf5ed00e8379.png\">","v2",0,{"answer":28,"createTime":5,"id":29,"options":30,"question":35,"source":25,"type":26},[],1068010210,[31,32,33,34],"系统因果稳定","系统非因果稳定","系统因果不稳定","系统非因果不稳定","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8840b12eae1f1b961f12f4279d06195d.png\">",{"answer":37,"createTime":5,"id":38,"options":39,"question":44,"source":25,"type":26},[],1068010234,[40,41,42,43],"矩形窗","汉宁窗","哈明窗","布莱克曼窗","假设用窗函数法设计一个阻带衰减至少达到60dB的数字滤波器,则应该选择以下哪种窗函数进行设计",{"answer":46,"createTime":5,"id":47,"options":48,"question":53,"source":25,"type":26},[],1068010237,[49,50,51,52],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdc15585917293ec4430fb68ae9d1ec4f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F73a8a10ef6e5ff8a10aa8a7ba79ea7b6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd86f38723252ffbec078b818f02cca3a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff6c6503061510641b619043c0fcfaf37.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3ca6f72b645900844e9af6e727769e19.png\">",{"answer":55,"createTime":5,"id":56,"options":57,"question":62,"source":25,"type":26},[],1068010291,[58,59,60,61],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe6fb920816746dd6d396c767f7983a3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb662314e9b36c065f9536fb2ed1c7521.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb6a7f96326e2a1af43ad6ce7f524f8e6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F891f9308d2fbdc99879923ed2f80bca1.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F77f407cac32caad6565d11e807d7a823.png\">",{"answer":64,"createTime":5,"id":65,"options":66,"question":71,"source":25,"type":26},[],1068010319,[67,68,69,70],"线性移变系统","线性移不变系统","非线性移变系统","非线性移不变系统","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd86c3a01641af417d408503ae101a63a.png\">",{"answer":73,"createTime":5,"id":6,"options":74,"question":14,"source":25,"type":26},[],[8,9,10],{"answer":76,"createTime":5,"id":77,"options":78,"question":83,"source":25,"type":26},[],1068010340,[79,80,81,82],"因果、稳定系统","非因果、稳定系统","因果、非稳定系统","非因果、非稳定系统","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F13f5845ad31c49d4d7d8aae4db05a90d.png\">",{"answer":85,"createTime":5,"id":86,"options":87,"question":92,"source":25,"type":26},[],1068010348,[88,89,90,91],"5","4","8","该序列无周期","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F936e2d696f46ce06b46b516d869837f0.png\">",{"answer":94,"createTime":5,"id":95,"options":96,"question":101,"source":25,"type":26},[],1068010358,[97,98,99,100],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F86756fed94868f29f481f15c68ccfa08.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb06bbb77752062068df81c3a5e8f6206.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F667157755ad8626e246ac81a7e60ac32.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4827e1de7706011d6bc1a33090d24b47.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6df4daa16c4f43f191c91b8c90c6c6df.png\">"]