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;

Objectives Students will be able to: 1. understand the main idea(cloning is a two- edged sword) and structure of the text; 2. appreciate the writing strategies employed by the author, 3. master the key language points and grammatical structures in the text;

Students will be able to: 1. understand the main idea and structure of the text; 2. appreciate how the repeated use of clues helps weave a piece of narration together; 3. grasp the key language points and grammatical structure in the text

Students will be able to 1. understand the main idea and the structure of the text. 2 earn to memorize words in association 3. grasp the key language points and grammatical structures in the text 4. conduct a series of reading, listening speaking and writing activities related to the theme of the unit

At least 90 percent of UFO sightings can be identified as conventional objects, although time-consuming investigations are often necessary for such identification. The objects most often mistaken for UFOs are bright planets and stars aircraft, birds, balloons kites aerial flares, peculiar clouds, meteors and satellites. The remaining sightings most likely can be attributed to other mistaken sightings or to inaccurate reporting hoaxes or delusions although to disprove all claims made about UFOs is impossible

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

1. understand the main idea (despite his wealth, Sam Walton remains down-home and devoted to his team) and the structure of the text; 2. appreciate the use of indirect description in portraying person: 3. grasp the key language points and grammatical structures in the text

1规划模型的基本概念 规划模型的一般形式三要素 (1)决策变量,通常是该问题要求解的那些未知量,不妨用n维向量x=(1x2,xn)表示,当对x赋值后通常称为该问题的一个解 (2)目标函数,通常是该问题要优化(最大或最小)的那个目标的数学表达式,它是决策变量x的函数,可以记作f(x) (3)约束条件,由该问题对决策的限制条件给出,即x允许取值的范围x∈,称为可行域。通常

重点评述了放射性碳同位素法对气溶胶源解析的技术原理、分离测试方法以及在我国应用的研究进展;最后提出了国内研究应加强的领域和利用放射性碳同位素法研究大气气溶胶的发展趋势

§1-1 测量学的内容与任务 §1-2 测量学的发展与作用 §1-3 地球的形状和大小 §1-4 地面点位的确定 §1-5测量工作的基本概念 ◼基本原则 ◼控制测量 ◼地形测量 ◼施工放样 ◼基本观测量 距离 角度 高差 §1-6地球表面曲率对测量工作的影响 § 1-7 测量的度量单位