[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fPe3Q_YFOX2819v8711JYqpl7GJ6295XOBKtr1Pt6t8U":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-12-31 18:56:26",124877866,[8,9,10,11],"空集","x是y的曾祖父母","x是y的妻子","x是y的祖父母",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},59,"b6b5c394a79af6ad8bd927814ee5e4d4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","离散数学","exam_107218751","23241-阶段测试-2","设R和S是定义在人类P上的关系,其中,R={<x,y>|x,y∈P∧x是y的父亲},S={|<x,y>|x,y∈P∧x是y的母亲},试问\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcb96145116cd64891417adc06522147a.webp\">°R表示 关系",[21,26,35,44,53,62,71,80,86,95],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],124877867,[30,31,32,33],"对称性、反自反性","传递性","反对称性","自反性","集合A={1,2,…,10}上的关系R={<x,y>|x*y=8,x,y∈A},则R 的性质为",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],124877870,[39,40,41,42],"双射","满射","不是单射也不是满射","单射","X={a,b,c,d,e},Y={1,2,3,4},f从X到Y的映射,其中f(a)=2,f(b)=4,f(c)=1,f(d)=3,f(e)=4,则f是",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],124877871,[48,49,50,51],"{{1,2,3}}","2,3","{<2,3>}","{2,3}","关系R={< 1,< 2,3 >>,< {2}, < 2,3 >>,< 2,< 2,3 >>},值域正确的是",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":24,"type":25},[],124877872,[57,58,59,60],"反对称的","对称的","自反的","传递的","设R是集合A上的偏序关系,则R不一定是",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":24,"type":25},[],124877873,[66,67,68,69],"偏序","等价","恒等","逆序","设集合A={a,b,c},A上的二元关系R={<a,a>,<b,b>,<c,c>,<a,b>,<c,b>},则R是A上的 关系",{"answer":72,"createTime":73,"id":74,"options":75,"question":79,"source":24,"type":25},[],"2023-12-31 18:56:27",124877875,[76,77,78,32],"是反自反性","对称性","不是自反性","下面关系图性质描述正确的是 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a6b991ada47f8e9445e135cb4412b3e.png\">",{"answer":81,"createTime":73,"id":82,"options":83,"question":85,"source":24,"type":25},[],124877876,[60,84,58,59],"传递的,对称的","集合A={1,2,…,10}上的关系R={<x,y>|x+y=20,x,y A},则R 的性质为",{"answer":87,"createTime":73,"id":88,"options":89,"question":94,"source":24,"type":25},[],124877878,[90,91,92,93],"f是双射的","f是单射","f非单射非满射","f是满射","设函数f:N→N(N 为自然数集),f(n)=n+1,下面四个命题为真的是",{"answer":96,"createTime":73,"id":97,"options":98,"question":103,"source":24,"type":25},[],124877880,[99,100,101,102],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff32029ab2ac9d118e92e3e425e1e0796.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F056f31649d2883c342ec3c23901aa10e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdfbfa2dc896b945842393926fd90dc6b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F33a228aa4577ce674466c45da2cf554a.png\">","下列函数中,实数集到实数集的双射函数的是"]