[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZI6uJ7P2lsY91GyuoHASyHb6XfC9VtziXXzqRreZrVE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-10-25 19:08:00",221075193,[8,9,10,11],"A+30*ones(size(A))","A+30*eye(size(A))","A+30*eye(A)","A+30*eye(4)",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"4554dd30b527b8a840a0dbe4e4842000","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","MATLAB应用基础","work_45848225","","&rlm;将矩阵A对角线元素加30的命令是( )",[21,33,42,45,54,63,73,82,91,100],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-10-14 13:55:21",221075191,[26,27,28,29],"P=diag(diag(flipud(pascal(6))))","P=diag(flipud(pascal(6)))","P=diag(diag(flipud(pascal(5))))","P=diag(flipud(pascal(5)))","&zwj;产生以(x+y)^5展开后的系数构成的对角阵P,可以采用的语句是( )","v1",0,{"answer":34,"createTime":35,"id":36,"options":37,"question":41,"source":31,"type":32},[],"2025-10-14 19:50:30",221075192,[38,38,39,40],"2","5","1","​语句&quot;A=sparse([0,2,5;2,0,1])&quot;执行后,输出结果的最后一行是( )",{"answer":43,"createTime":5,"id":6,"options":44,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":46,"createTime":5,"id":47,"options":48,"question":53,"source":31,"type":32},[],221075194,[49,50,51,52],"A= fix(10+90*rand(5))","A=fix(10+100*rand(5))","A= fix(10+89*rand(5))","A= fix(20+90*rand(5,5))","&zwj;建立5阶由两位随机整数构成的矩阵A,其语句是( )",{"answer":55,"createTime":5,"id":56,"options":57,"question":62,"source":31,"type":32},[],221075195,[58,59,60,61],"条件数","秩","迹","范数","​用来描述矩阵性能的数是( )",{"answer":64,"createTime":65,"id":66,"options":67,"question":72,"source":31,"type":32},[],"2025-10-14 09:44:46",221075196,[68,69,70,71],"trace(A)","rank(A)","norm(A)","cond(A)","​求矩阵A的范数的函数是( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":31,"type":32},[],221075197,[77,78,79,80],"改变存储顺序","提高运算精度","节约内存空间","设计高效算法","&zwj;采用稀疏存储方式的主要目的是( )",{"answer":83,"createTime":5,"id":84,"options":85,"question":90,"source":31,"type":32},[],221075198,[86,87,88,89],"M=magic(1,3)","M=Magic(3)","M=MAGIC(3)","M=magic(3)","​建立3阶魔方阵M的语句是( )",{"answer":92,"createTime":23,"id":93,"options":94,"question":99,"source":31,"type":32},[],221075199,[95,96,97,98],"三角阵","对角阵","数量矩阵","单位阵","&rlm;语句&quot;[X,D]=eig(A)&quot;执行后,D是一个( )",{"answer":101,"createTime":5,"id":102,"options":103,"question":108,"source":31,"type":32},[],221075200,[104,105,106,107],"A=one(3)","A=one(3,3)","A=ones(3,3)","A=ones(3,1)","&zwnj;建立3阶幺矩阵A的语句是( )"]