一.1.282.1473.(b,10)=14.0.958405.726.393 7.-18. 9.(m)=510.(a,b)|c (,) 11.A12.D13.D14.C15.D16.a17.d18.b19.d20.c 三.1.解:由于(9,21)=3,而3144,所以原方程有解

5.矩阵的秩 矩阵的秩是一个很重要的概念,在研究线性方程组的解等方 面起着非常重要的作用。 定义1.在矩阵An中任取k行k列(1≤k≤min(m,n),由 位于这些行、列相交处的元素按原来的次序构成的k阶行列式, 称为A的一个k阶子式,记作D(A)

Inti I. Basic listening practice 1. Script W: Ok. It's your turn to pay the bill. I paid last time M: What? You have a selective memory. You tried to pay last turn, but your credit card failed; so I ended up paying! It's definitely your turn Q: What is true according to the conversation? 2. Script

Into I. Basic listening practice 1. Script w: What's that? Is it a toy? Did it get chewed by a dog? M: Hey, that s my mascot! My uncle gave it to me when I was five, and it's been with me ever since. It brought me luck in all my college exams. I can t bring myself to

1 一般描述 在一定的温度(T)和压力(p)下,溶质A在气相和液相中组成的关系为什么仅仅是组分A? 组成的表述有多种方法气相中:分压pA,摩尔分数yA,摩尔比YA液相中:摩尔浓度cA(kmol/m3),摩尔分数A,摩尔比A

Uints I. Basic listening practice 1. Script W: Why do some people stay in one job for life while others switch jobs from time to M: Some people want a fixed routine so that they dont have to adapt tot new circumstances over and over again, while others think variety is the spice of life Q: According to the dialog, why do some people stick to one job for life?

本节先介绍极限存在准则利用它们来导出两个重 要极限. 一、极限存在准则 准则I(夹逼定理)若Vx∈U(x,)(或|x>M), 均有g(x)≤f(x)≤h(x)且limg(x)=limh(x)=A, 则有limf(x)=A

采用Thermo-Calc热力学计算软件,对T122铁素体耐热钢钒含量变化对平衡析出相及A3、A4点的影响进行了研究.结果表明,T122钢的主要平衡析出相为M23C6、MX和Laves相.当钒质量分数在0.15%以下时,将析出极少量的Z相,且其随着钒含量的增加析出量呈直线下降;当钒质量分数在0.28%以上时,将析出两种不同的MX相,随着钒含量的增加MN相的比例下降,而M(C,N)相的比例增加.钒含量的变化对M23C6和Laves相的影响甚小.钒作为封闭奥氏体元素,增加钒含量,铁素体与奥氏体的转变区域将变小

RIGI0 BoDY DYNAMICS ·T叭ocAP0 NENTS千0RtG1D80 y MoTIo 千 RANSLAT(0NAL F= M R升 TIONAL D ECOU PLE PRO vIED 工ND0FRTT0A AA0A工Nb0FTRA5L|N

Chapter 1 Introduction Chapter 2 Manufacture of 3D Fibre Preforms Chapter 3 Preform Consolidation Chapter 4 Micromechanics Models for Mechanical Properties Chapter 5 3D Woven Composites Chapter 6 Braided Composite Materials Chapter 7 Knitted Composite Materials Chapter 8 Stitched Composites Chapter 9 Z-Pinned Composites