【单选题】Consider a linear system whose augmented matrix is of the form which of the following statements hold such that the system will have infinitely many solutions?
【判断题】生产进度控制是对生产量和生产期限的控制。
【多选题】Consider a linear system whose augmented matrix is of the form ,which of the following statements hold such that the system must have the unique solution?
【单选题】实用文写作要求排版美观大方,以下选项比较合理的是: