【单选题】If -1,0,2 are eigenvalues of a 3×3 matrix A, then which of the following is Not the eigenvalue of the matrix ?
【判断题】If 1,-1,2 are eigenvalues of a 3×3 matrix A, then A is nonsingular.
【判断题】If A is a 3*3 matrix with three pivot positions, there exist elementary matrices E_1,E_2,...,E_p such that E_p...E_1A=I .
【单选题】根据信道的传输参数的特性可分为恒参信道和随参信道,恒参信道的正确定义是()。
【单选题】胰岛素笔注射胰岛素发生感染的预防措施哪项不正确:
【判断题】If A is a 3×3 matrix and a1 +2a2 −a3 = 0, then Amust be singular.
【多选题】在涉外交往中,话题力求_______,那些人们共同关心的全球性话题。()