一、消元法解线性方程组 二、矩阵的初等变换 三、小结

教学内容 包括4个单元。依次对数控机床的加工与使用特 数控机床的组成与数控糸统工作原理、數控机床的分 类进行了总括性介绍,进而展望了数擅机床的发畏趋 势 基本要求 把握数控糸统的组成及其各模块的功能分工和相互 联糸;基于数控机床的分类,了解数控机床的相关基 础概念、基本概汎。把握程度:能简单复述

Unit 1 Book Three Unit One Section A The Expensive Fantasy of lord williams I Greetings I Review. 1. Key words section A: survival, sorrow, ancient, endure, channel, invade, surrender, historic, cast crash, commuter, suburb, resolution, exhaust, rescue, wreckage, decent section B: innocent, drift, mere, explode, expose, sector, layout, sway, uneasy, heal glimpse, flesh, heir

Review: Have a small quiz. Have a dictation of the words in Unit 2 consume moderate liable allowance typical fatigue advisable modify interfere succession imply obstacle density boost stem speculate maintenance academic II. Start the new lesson 1 Introduction The Hyde School sees itself as preparing children for life by cultivating a comprehensive set of principles which

approve, affection, exaggerate, version, fame, solemn, inspire, stretch, settlement, reputation, contract, evolve, astonish, annual, bare, distinct, comprise, imaginary feature, illustration, influential, plunge, gratitude, distribution I Start the new lesson 1. Introduction Mrs. Clark was seriously ill and would die soon. She was just a skeleton at that time The nurse accompany her finishing her rest of life. She was the mother of seven, grandmother of eighteen and a concert piano player. Her graceful hands impressed the

玉米小斑病是温暖潮湿玉米产区的重要叶部病害。早在1925年定名前后,世界各国就 有不同程度的发生。1970年,小斑病在美国大流行,减产165亿kg,占美国玉米总产量的 15%,损失产值约10亿美元,因超过1840年欧洲马铃薯晚疫病大流行造成的损失而震动全 球。中国江苏在20世纪20年代就有小斑病的发生,但过去只发生在多雨年份且多在后期流 行,很少造成严重损失

n(元)维随机变量(向量) 称同一个样本空间Ω上的n个随机变量 X1,2,…,Xn构成的n维向量(X1,2,Xn) 为Ω上的n维随机变量(向量) 注:一维随机变量即为上一节介绍的随机变量, 二维及二维以上的随机变量称为多维随机变量