Objectives Students will be able to: 1. understand the main idea (Bill Porter the salesman will never give in) and structure of the text (4 parts, 2 flashbacks); 2. appreciate the characteristics of journalistic writing; 3. grasp the key language points and grammatical structures in the text;

2.5.2可逆矩阵,方阵的逆矩阵 1、可逆矩阵,方阵的逆矩阵的定义 定义设A是属于K上的一个n阶方阵,如果存在属于K上的n阶方阵B,使

化学系拥有一支高素质教师队伍。有博士学位教师比例(占教师总数的70 %)、年人均SCI论文数量和质量名列 天津大学首位。其本科专业应用化学专业是天津大学4个A++专业之一。化学 系现有教授19人(其中博士生导师9人), 副高级职称教师28人,硕士生导师36人,讲师16人。化学系下设有机化 学、物理化学2个博士点,有机化学、物理 化学、无机化学3个硕士点

Teaching Objectives 1)understand the main idea(despite the many negative effects of virtual life the author prefers it to real life) and the structure of the text(contrast between virtual life and real life); -2)learn some rules of interpreting new vocabulary

典型习题解析 1图示直杆截面为正方形,边长a=200m,杆长L=4m,F=10k,材料密度 p=20k/m3.考虑杆的自重,计算1-1和2-2截面轴力,并画轴力图

9.4 海洋有机磷农药污染 9.4.1 海洋有机磷农药概述 9.4.2 海洋有机磷农药污染危害 9.4.3 海洋有机磷农药来源 9.4.4 海洋有机磷农药分布 9.4.5 海洋有机磷农药降解 9.4.6 海洋有机磷农药污染的防治措施 9.5 海洋合成洗涤剂污染 A. 基本定义 B. 洗涤剂的类型 C. 海洋洗涤剂的来源 D. 海洋洗涤剂的危害 E. 海洋洗涤剂的降解 F. 海洋洗涤剂的防治

目的:收入来源地的确定和说得计算规则 一、不动产所得征税权分配规则 1不动产的概念: (1)以不动产所在国的法律确定; (2)必须包括: A与不动产不可分割的附属物:附属于不动产的财产;农业或林业所使用的牲畜和设备

The milks of all mammals contain lipids but the concentration varies widely between species from c. 2% to greater than 50%(Table 3. 1). The principal function of dietary lipids is to serve as a source of energy for the neonate and the fat content in milk largely reflects the energy requirements of the species, e.g. land animals indigenous to cold environments and marine

Problem 1. An undirected graph G has width w if the vertices can be arranged in a se- quence V1,2,3,…,Vn such that each vertex v; is joined by an edge to at most w preceding vertices. (Vertex vj precedes if i.) Use induction to prove that every graph with width at most w is (w+1)-colorable

In this example, the domain is the set fa,b, c, d, el and the range is the set Y= (1, 2, 3, 4, 5/. Related elements are joined by an arrow. This relation is a function because every element on the left is related to exactly one element on the right. In graph-theoretic