单选题:设A、B为同阶矩阵,且A、B等价,则( ) 题目分类:工程数学-线性代数 题目类型:单选题 查看权限:VIP 题目内容: 设A、B为同阶矩阵,且A、B等价,则( ) A.r(A)=r(B) B.A、B有相同的特征多项式 C.|A|=|B| D.A、B合同 参考答案: 答案解析:
To become actresses __________ (be) their ambition. To become actresses __________ (be) their ambition. 分类:工程数学-线性代数 题型:单选题 查看答案
Children should avoid __________ (watch) TV for several hour Children should avoid __________ (watch) TV for several hours a time. 分类:工程数学-线性代数 题型:单选题 查看答案
A. enjoyable B. unforgettableC. responsible D. patient A. enjoyable B. unforgettableC. responsible D. patient 分类:工程数学-线性代数 题型:单选题 查看答案