设 A 为 n 阶矩阵, B 为 n 阶非零矩阵,若 B 的每一个列向量都是齐次线性方程组 Ax =0 的解,则A的行列式为 prefix="v" ns="urn:schemas-microsoft-com:vml" prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> ?xml:namespace> _____ .
【单选题】听力原文:(M = John Fox, F = Sue Green) F: Hello, I'm Sue Green. You must be John Fox. M: Yes, I am. F: Thanks for coming to the job interview. Let me ask you a few questions. M: Yes, please. F: Have you g...