[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3eTx4-2ZPzbERVaS3JNZxB1tp1Ia2D2Etfhy3pKXxfA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-10-12 22:30:00",99433565,[8,9,10,11],"25","50","14","7",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"5c0207fe4d8a336143069fb0fa40fb15","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb1605ee131819f664505adb703968d2e.jpg","解析几何","6996aa7373e74d09a5dd0c848f6b5ceb","两向量的数量积——测验","已知平行四边形ABCD,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff8ae6a968863b24bd8fa09e965647d36.webp\">AC和BD是对角线,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9949ad9f3fee979045c7ebd45680eb04.webp\">为( )",[21,26,36,45,54,63,70,79,84,89],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":28,"id":29,"options":30,"question":35,"source":24,"type":25},[],"2023-10-12 22:30:01",99433569,[31,32,33,34],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F46f1547f962aa3557a4c45cc8e17900d.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd0e982b95f7679ff461937e00b3c1bf8.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2104665ed7671226a28b4362a0bb39e9.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F982962d9d6a9b8e7257265b08c3fa257.webp\">","设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa51a112e60ea055873c8233245bd0a2f.webp\">是两两垂直的单位向量且顺序符合右手规则,则向量\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85fdb5c3a3d9dbf9e1975f3c8a094a98.webp\">与向量\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3b3396995555d4f699a6bb66421966cc.webp\">的夹角是( )",{"answer":37,"createTime":28,"id":38,"options":39,"question":44,"source":24,"type":25},[],99433570,[40,41,42,43],"(-2,1,-2)","(2,1,-2)","(2,1,2)","(-2,1,2)","与向量AB(1,2,0),CD(1,0,-1)都垂直的向量为",{"answer":46,"createTime":28,"id":47,"options":48,"question":53,"source":24,"type":25},[],99433571,[49,50,51,52],"1\u002F3","1\u002F2","1","2\u002F3","已知a,b,c是向量,丨a丨=1,丨b丨=2,丨c丨=2且a,b,c两两垂直,则向量a+b+c与a的夹角余弦值为",{"answer":55,"createTime":28,"id":56,"options":57,"question":62,"source":24,"type":25},[],99433573,[58,59,60,61],"平行","垂直","相等","不平行也不垂直","设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5ffc4822eee12acbe5c9ceeaef503b77.gif\">均为非零向量,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1de4ee3a1a7828c811fc2d94d788b851.gif\">与非零向量\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F575c0f311a5139db9f58ee52373d099d.gif\">的关系是",{"answer":64,"createTime":28,"id":65,"options":66,"question":69,"source":24,"type":25},[],99433574,[11,67,10,68],"-7","-14","已知a,b,c是向量,丨a丨=1,丨b丨=2,丨c丨=3,a+b+c=0则a·b+b·c+c·a=",{"answer":71,"createTime":72,"id":73,"options":74,"question":77,"source":24,"type":78},[],"2025-11-28 00:37:38",243648648,[75,76],"正确","错误","数量积满足交换律",3,{"answer":80,"createTime":72,"id":81,"options":82,"question":83,"source":24,"type":78},[],243648649,[75,76],"两向量的数量积是一个向量",{"answer":85,"createTime":72,"id":86,"options":87,"question":88,"source":24,"type":78},[],243648650,[75,76],"向量满足\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffbb47a0e49e7029630d34c6349633e21.webp\">",{"answer":90,"createTime":72,"id":91,"options":92,"question":93,"source":24,"type":78},[],243648651,[75,76],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6348a596822a6d57a7d26ac10fcb88c4.webp\">"]