矩阵为正交矩阵。
矩阵为正交矩阵。[勤读书网站]...
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矩阵为正交矩阵。[勤读书网站]...
三阶矩阵A的特征值为-2,1,3.则下列矩阵中非奇异矩阵是( )。[勤读书网站]2I-A---2I A---I-A---A-3I...
设A为n阶实对称矩阵,则( )。[勤读书网站]A的n个特征向量两两相交---A的n个特征向量组成单位正交向量组------...
矩阵A与B相似的充分条件是( )。[勤读书网站]---------...
( ))。[勤读书网站]A的列向量组线性无关---A的列向量组线性相关---A的行向量组线性无关---A的行向量组线性相关...
。[勤读书网站]...
设向量组线性无关,则下列各结论中不正确的是( )。[勤读书网站]---------...
( )。[勤读书网站]---------...
=( )---------...
词汇与语法知识(共25小题;每题1.5分,共37.5分。) 从每小题的四个选择项中,选出最佳的一项。 1. Allen _______ any good job since he came to New...
6.-How _________ will you be able to finish the painting -In a couple of hours. A. soon B. often...
11. That was _______ matter that I had no choice but to talk it over with my parents. A. a such serious B. a so seriou...
16. ______ the government argees to give extra money,the theatre will have to be closed next month. A. Unle...
21. Henry never said that he was good at maths,_______ he A. was B. did C. didn't D. wasn‘t 22....
通读下面的短文,掌握其大意。然后,从每小题的四个选择项中选出可填入相应空白处的最佳选项。 I once went to a town in the north of England on business....
激光打印机可以进行复写打印。[勤读书网站]( )...
显示器分辨率由CPU型号决定。[勤读书网站]( )...
内存容量指内存的存储容量,一般以GB为单位,主流为2G、4G、8G。[勤读书网站]( )...
硬盘的主流品牌有?Seagate(希捷)---Hitachi(日立)---WD(西部数据)---Samsung(三星)...
内存按技术规格划分,可分为 ( ) 。[勤读书网站]EDO内存---SDRAM内存---DDR内存---Rambus内存...