2.4.1矩阵运算的定义 定义(矩阵的加法和数乘)给定两个mn矩阵 [a1a12an

一、单选题(每题1分,共16分) ()1.在一个图中,所有顶点的度数之和等于图的边数的倍。 A.1/2 B.1 C.2 D.4 ()2.在一个有向图中,所有顶点的入度之和等于所有顶点的出度之和的倍。 A.1/2 B.1 C.2 D.4

2.1.1向量和m维向量空间的定义及性质 定义(向量)设K是一个数域。K中m个数a1a2,m所组成的一个m元有序数组称为一个m维向量

一、选择题 1、“教学随笔”类描述性的经验总结属于 A、具体经验总结B、一般性经验总结C、科学性经验总结 2、“你为什么来读书?请自由作答”,此问题属于 A、封闭式问题B、开放式问题 C、混合式问题

第四章参考答案 一、单项选择题 1、B2、B3、D4、B5、B6、C7、B8、D9、B10、D11、 C12、C13、A14、D15、A16、C

II. Listening Skills Making Calculations 1. W: It sounds expensive. Why did they charge you so much for repairing the computer? M: Well, its $25 for labor to start with. A new modern cost another 50 bucks. On top of that I needed a new battery, and it cost $17

第五章参考答案 一、单项选择题: 1、B、2、A、3、D、4、C、5、A、6-2 3BCBCD3;CDBDD;ADBAC;CDA 二2、多项选择题: 1\\AC; 2\\ABCD, 3\\AB; 4\\ABCD; 5\\AC 6\\BC: 7\\AC; 8\\AB; 9\\ABCD: 10\\ABC; 11\\ABCD;

Letter Writing (Samples and Instruction) My dearest friend Recently I have noticed a habit of yours that is becoming a serious problem. It smoking. As long as you are in, our bedroom is filled with terrible smell and the ashtray is overflowed with cigarette butts

Uints I. Basic listening practice 1. Script W: I bought a camera from your store. Here's my receipt. I know it's just warranty period, but the camera hasn't worked properly for some time, and now it's not focusing at all. M: We're sorry you've has problem with one of our cameras. I t seems that the camera has suffered some damage, but you've been a regular customer, and wed

矩阵的特征值与特征向量 一、特征值与特征向量的求法 1利用定义求特征值与特征向量 步骤: (1)由|A-AE|=0求出λ; (2)对求(A-E)X=0的非零解