[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fAiZYCktEdjEdcWj_BwUy99lJMrtH-2CVmExaniVh8VQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2025-11-18 19:18:20",1080039085,[8,9,10,11],"〈Q,*〉Q是全体有理数集,*是数的乘法运算","〈Mn(R),*〉,Mn(R)是全体n阶实矩阵集合,*是矩阵乘法运算","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4e52bf39579a1145935887aa0a3f3ad2.png\">","〈Z,+〉,Z是整数集,+是数的加法运算",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000061051","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F028c9580f23ecd8fde218c4288ec2106.jpg","离散数学","62886135","第九章单元测试","下列各代数系统中不含有零元素的是( )",[20,31,40,49,58,67,76,81,86,95],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],1080038808,[24,25,26,27],"只有一种","有2种","没有","有无数种","一个节点数大于1的完全偶图\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93a711388be1a3b6a53677b39bd60eeb.png\">是欧拉图、哈密顿图和平面图,满足此条件的n,m取值( )","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],1080038814,[35,36,37,38],"非零整数集合Z*上的除法运算","全体n×n实可逆矩阵集合Mn(R)上的矩阵加法和乘法运算","全体n×n实矩阵集合Mn(R)上的矩阵加法和乘法运算","A={1,2,…,10},x*y=LCM(x,y),即x,y最小公倍数","下列集合对所给的运算是封闭的只有( )",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],1080038818,[44,45,46,47],"a*b=|a-b|","a*b= \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcec1a63f51b795c9739dba86a5bac043.png\">","a*b=max {a, b}","a*b=min {a, b}","设S是自然数集,则下列运算中不满足交换律的是( )",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],1080038822,[53,54,55,56],"交换律","结合律","幂等律","有零元","设实数集R上的二元运算o为:xoy=x+y-2xy,则o不满足( )",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":29,"type":30},[],1080038826,[62,63,64,65],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0a2e88c15ad57cab8892c060025b82a9.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4a09ebd2601ab0022c3fc087fba62da5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1e4083728f4704faca9d4e3f4a4064e9.png\">","不存在","设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae900419d3a3032d87b63c4bc5c88174.png\"> 是非空有限集,代数系统\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F34ba6c5d758487a8efcbef16b8743be5.png\">中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F510f8b582f5b458d0f31460c51c037ed.png\">对\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F265874ff3ccc0bc3a4b0dfab2a965ad0.png\">运算的单位元是( )",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":29,"type":30},[],1080038828,[71,72,73,74],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe19389f5fe6a61aa4846f4c5d4e5d443.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F733a753362775849ee2aa01b39671777.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F658d921653d0eb31388dc24ad544917e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc771faec5fdf8bfc3a577e7b5e169148.png\">","在自然数集\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe69143629388c9edd1c79d23512590fe.png\">上,下列哪种运算是不可结合的?( )",{"answer":77,"createTime":5,"id":78,"options":79,"question":80,"source":29,"type":30},[],1080038885,[62,63,64,65],"设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae900419d3a3032d87b63c4bc5c88174.png\"> 是非空有限集,代数系统\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F34ba6c5d758487a8efcbef16b8743be5.png\">中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F510f8b582f5b458d0f31460c51c037ed.png\">对\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F265874ff3ccc0bc3a4b0dfab2a965ad0.png\">运算的零元是( )",{"answer":82,"createTime":5,"id":83,"options":84,"question":85,"source":29,"type":30},[],1080038889,[62,63,64,65],"设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F27bdc9aaef1709a14e05d8b4d2e08ed2.png\"> 是非空有限集,代数系统\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6f4b47c172a4acb3760c7189720f74ab.png\">中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F86bbc49cabc0e45c6a12480b00052731.png\">对\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc8e15093ee128637c6cd32db05ff3e48.png\">运算的单位元是( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":29,"type":30},[],1080039003,[90,91,92,93],"〈Z,+,\u002F〉","〈Z,\u002F〉","〈Z,-,\u002F〉","〈P(A),∩〉","设Z为整数集,A为集合,A的幂集为P(A),+、—、\u002F为数的加、减、除运算,∩为集合的交运算,下列系统中是代数系统的有( )",{"answer":96,"createTime":5,"id":6,"options":97,"question":18,"source":29,"type":30},[],[8,9,10,11]]