[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fKwHdVhXp6VbbyutXrO6h7yMlMkvE9XNKfuovHA9fNzQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":19,"type":20},[],"2026-05-21 00:34:46",379651716,[],{"courseId":9,"courseImg":10,"courseName":11},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","A = rand(3,4);使用zeros 和size 函数创建与A数组大小相同的全0 矩阵 注:上机练习得到正确答案后,然后再提交你的答案",[14,21,24],{"answer":15,"createTime":5,"id":16,"options":17,"question":18,"source":19,"type":20},[],379651715,[],"用至少3 种方式创建矩阵A=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9741db726f76b5f7a7e45b4f082329fc.png\">;(注:采用合并、reshape 函数等多种方式来创建) 注:上机练习得到正确答案后,然后再提交你的答案","v1",4,{"answer":22,"createTime":5,"id":6,"options":23,"question":12,"source":19,"type":20},[],[],{"answer":25,"createTime":5,"id":26,"options":27,"question":28,"source":19,"type":20},[],379651717,[],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F41d6daf02f5f3ef71c1911f84b3f85e9.png\"> 1) 用矩阵a 的第三列元素组成一个新矩阵d; 2) 把矩阵b 和d 合并成一个3行2列的矩阵e; 3) 把矩阵b 和d 合并成一个6行1列的矩阵f; 4) 将矩阵c 的前三个元素和矩阵a 组成一个4行3列的矩阵g; 5) 创建一个向量h,它的第一个元素是a13,第二个元素是c12,第三个元素是b21;(注a13表示a矩阵的第1行第3列元素,以此类推) 注:上机练习得到正确答案后,然后再提交你的答案"]