[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3FlSzkO2UYTpBSfoxGtwqEDrZyLVx2PJvz_24RtDms4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":16,"related":17,"source":27,"type":52},[],"2025-11-18 19:00:19",1080038699,[8,9],"对","错",{"courseId":11,"courseImg":12,"courseName":13,"workId":14,"workName":15},"1000061051","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F028c9580f23ecd8fde218c4288ec2106.jpg","离散数学","62886131","第五章单元测试","设|A|=n, |B|=m, 当n=m时存在双射.( )",[18,29,38,47,53,61,64,73,82,90],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],1080038684,[22,23,24,25],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7f0831d5a22b9eb31ba7a470671262c2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2ee2af2bdedde2af5c5858e4cd9b40aa.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe0bc6e7add4f5eaefa8848bfbe3614a0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F047fc59f88c4dba2a108ee4ba2d9bd9e.png\">","下列关系中能构成函数的是( )","v2",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],1080038686,[33,34,35,36],"满射不是单射","单射不是满射","双射","不是单射也不是满射","N是自然数集,定义\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7c86875bbc28c79b14d1990b172b280e.png\">(即x除以3的余数),则f是( )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],1080038688,[42,43,44,45],"g是双射","f是双射","g是满射","f是满射","若函数g和f的复合函数gf 是双射,则( )一定是正确的",{"answer":48,"createTime":5,"id":49,"options":50,"question":51,"source":27,"type":52},[],1080038690,[8,9],"设|A|=n, |B|=m, 从A到B有n*m个不同函数.( )",3,{"answer":54,"createTime":5,"id":55,"options":56,"question":60,"source":27,"type":28},[],1080038695,[57,58,35,59],"仅是单射","仅是满射","既不是单射也不是满射","设Z+是正整数集, f:Z+\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4f260d8164d1148b114ce6141b4c4323.png\">Z+→Z+,f(n, m)=nm, 则f是( )",{"answer":62,"createTime":5,"id":6,"options":63,"question":16,"source":27,"type":52},[],[8,9],{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":27,"type":28},[],1080039259,[68,69,70,71],"g是单射时,f是满射","g是单射时,f是单射","g是满射时,f是满射","g是满射时,f是单射","若f ºg 是满射,则( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":27,"type":28},[],1080039262,[77,78,79,80],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4428841909fe9c99a3c44b3e0509538c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0bf28ead556fb8e9d04694317c79c195.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd035bd20548711e22b8f3f98ec27f4f3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85c4aafdf199c0e5a5e711fcd24800fd.png\">","下面关系中,能构成函数的是( )",{"answer":83,"createTime":5,"id":84,"options":85,"question":89,"source":27,"type":28},[],1080039264,[35,86,87,88],"满射但不是单射","单射但不是满射","非单射也非满射","设集合\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4c433731823e569813c5f45054860fc8.png\">是从A到B的函数,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F09e280f5d943d3eb09e6e6760beabb6d.png\">\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcd44bae9764136e5aed4b64472dbad8f.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F980095923bbc12569569f9f43bf1b281.png\">是( )",{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":27,"type":28},[],1080039266,[94,95,96,97],"R1","R2","R3","R1和R3","设集合\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0daba8b1d4f21fc6ca27ed433d892a01.png\"> R1,R2,R3是A到B的二元关系,且R1={,}, R2={< a, 1>,, }, R3={, },则( )不是从A到B上的函数"]