1.  >>  成人高等教育 / 高等数学三:线性代数
 成人高等教育 / 高等数学三:线性代数
正确率:100%

矩阵可逆的充要条件是

  • A、

    矩阵非奇异

  • B、

    矩阵可以表示为一些初等矩阵的乘积

  • C、

    矩阵的等价标准形为同阶单位矩阵。

  • D、

    矩阵非满秩。

 参考答案:
 佳题速递:
  • 28、Clowns(小丑) like to make people laugh. They paint their faces and put on funny noses. Sometimes they put on a sad face but most of the time they put on a happy face. They also wear funny clothes. Most clowns work in circuses. They do all kinds of silly things to make the audience laugh. They run, jump, fall down, turn somersaults (翻滚,斤头), and roll over. They ride donkeys backwards. They push each other in wagons or wheelbarrows(独轮车). Sometimes they shout and sing. Clowns are funny men, and occasionally, women, too! A circus is not a circus without clowns! Children especially enjoy watching clowns. A clown named Cookie often visits hospitals to entertain sick children as well as older people. Sick people need to laugh. It helps them to get better faster. There is an old saying: "Laughter is good medicine."统考英语阅读理解
  • (单选题) What can be inferred from paragraph 2? ( ) A、The Iceman was killed while working.B、The Iceman could have died from the wound in the head.C、The Iceman lived a poor life.D、The Iceman was struck dead from behind.大学英语1
  • ( )作为兴国强国之魂,是实现中华民族伟大复兴不可或缺的精神支撑 思想道德与法治
  • 以下哪一项不是蛋白质合成后的加工方式? A、 A、 信号肽的切除 B、 B、 蛋白质的磷酸化 C、 C、 蛋白质的糖基化 D、 D、 蛋白质的乙酰化 E、 E、 蛋白质的构象变化生物化学与分子生物学
  • 4.银行发放短期贷款收取的利息应计入( )。 A.金融企业往来收入 B.投资收益 C.营业收入 D.利息收入A、选项DB、选项EC、选项AD、选项BE、选项FF、选项C银行会计学
  • 在“独裁式”的领导方式到极度民主化“放任式”领导方式之间存在着许多种领导方式,哪种方式好与不好,关键取决于各种客观因素,这种观点是( )的观点 管理学原理