[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fVDVQGFQyr0tnuaoiXcu_PsuisIsJVkz7FuMzj3pkeyA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2025-11-18 19:00:19",1080039264,[8,9,10,11],"双射","满射但不是单射","单射但不是满射","非单射也非满射",{"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","62886131","第五章单元测试","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( )",[20,31,39,48,56,64,69,78,87,90],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],1080038684,[24,25,26,27],"\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":32,"createTime":5,"id":33,"options":34,"question":38,"source":29,"type":30},[],1080038686,[35,36,8,37],"满射不是单射","单射不是满射","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":40,"createTime":5,"id":41,"options":42,"question":47,"source":29,"type":30},[],1080038688,[43,44,45,46],"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":49,"createTime":5,"id":50,"options":51,"question":54,"source":29,"type":55},[],1080038690,[52,53],"对","错","设|A|=n, |B|=m, 从A到B有n*m个不同函数.( )",3,{"answer":57,"createTime":5,"id":58,"options":59,"question":63,"source":29,"type":30},[],1080038695,[60,61,8,62],"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":65,"createTime":5,"id":66,"options":67,"question":68,"source":29,"type":55},[],1080038699,[52,53],"设|A|=n, |B|=m, 当n=m时存在双射.( )",{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":29,"type":30},[],1080039259,[73,74,75,76],"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":79,"createTime":5,"id":80,"options":81,"question":86,"source":29,"type":30},[],1080039262,[82,83,84,85],"\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":88,"createTime":5,"id":6,"options":89,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":29,"type":30},[],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"]