1.概括分析:在第二章中我们研究了离散型随机变量,在那里随机变量只取有限个或 可列个值,这当然有很大的局限性在许多随机现象中出现的一些变量,它们的取值是可以充满 某个区间或区域的(也就不会只取有限个或可列个的值),概率论的任务是要研究它们的统计规 律,那么对于这种更一般的随机变量,如何来描述它的统规律呢?因为单点集的长度为零由 此可知,用“分布列”是行不通的,需要另外找一个合适的“工具”分布函数.本节是概率 论中的基本内容之一学习本节,要求学生掌握随机变量

掌握随机变量的数学期望、方差、协方差、相关系数等几个基本概念及其性质并会求一 些随机变量及函数的数学期望与方差为后面的学习打下基础

《Authorware6.0》开发面成,无需安装使 用,放入光盘可自动运行,操作非常简单,只要略懂电脑操作的人都能使用。 本课件使用了大量的图片和动画形像生动的展现了人肉眼无法看到的原子和分 子的内部结构,化微观为宏观,同时采用了大量超媒体链接技术,界面友好,具有 良好的人机交互性能。适用于化学、农学植保、园艺、环境工程、林学、动科、 生工、农机等各专业本科或专科使用

Teaching Objectives: a. to help students to form a picture of Britain when it was under the bombs from German armies during World War II b. to direct students to write a composition with the structure of a general statement supported by specific details c. to guide students to do some oral practice through doing the interview and picture description and the routine pair work as well

The students should be able to learn that Reading Passage A is about smoking problems and effects especially with the younger generation

Teaching Objectives: This unit is intended to increase our understanding of life. After learning it, SS should be able to .have a better understanding of life and work have a sharper awareness of the necessity of broad education understand the structure of an argumentative essay

This unit is intended to help us get a broader perspect Brain drain” After I hould be able to 1) Understand how the author looks at \Brain Drain 2) And how to cope with this challenging problem 3) Understand the writing method of making contrast in an argumentative essay king contrast

Lighten Your Load and Save Your Life Teaching Objectives: Health, one of our most precious gifts, should never be taken for granted or abused. In this unit we are given some advice we can use to help us take charge of our reactions to life events. From this unit students can learn:

1. To help Ss understand that we have some common ways of communication which are seldom considered as part of the process. 2. To help Ss understand that prejudice can arise from names, appearance and dress,hence enable them to communicate more smoothly

I. Description of the class: The students are freshmen with the age between 17-21. They are not very active and iastic enthusiastic. As a result, they sometimes can not concentrate on what is going on in class. They