Reading Assignment for week: Carey & Sundberg: Part A; Chapter 11 Concerted Pericyclic Reactions Pericyclic Reactions: Part–2 Chemistry 206 Advanced Organic Chemistry

三、标准齿轮传动的中心距 (a) (b) 1、保证两轮的顶隙c为标准值 2、保证两轮的侧隙为零

18-1一些概念 18-2沉淀分离法 18-3溶剂萃取分离法 18-4离子交换分离法 18-5其它分离方法

1 Induction Recall the principle of induction: Principle of Induction. Let P(n) be a predicate. If ·P(0) is true,an for all nE N, P(n) implies P(n+1), then P(n) is true for all nE N As an example let's try to find a simple expression equal to the following sum and then use induction to prove our guess correct 1·2+2·3+3:4+…+n·(mn+1) To help find an equivalent expression, we could try evaluating the sum for some small n and(with the help of a computer) some larger n sum

I. INTRODUCTION 2 II. OVERVIEW OF THE ENVIRONMENTAL CONSEQUENCES OF ARMED CONFLICT 4 III. THE ICC AND ENVIRONMENTAL PROTECTION: THE LANGUAGE OF THE ROME STATUTE 7 A. The Physical Act: Widespread, Long-term and Severe Damage 12

1 Case analysis The proof of a statement can sometimes be broken down into can be tackled individually 1.1 The method In order to prove a proposition P using case analysis Write, We use case analysis Identify a sequence of conditions, at least one of which must hold. (If this is not obvious, you must prove it

VOCABULARY Section A Directions: There 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the one word or phrase that you think best completes the sentences

I. 完成S循环/稳定的同位素分析 II. 全球碳循环 A. 新闻报道中的C B. 全球循环 C. 碳和温度 D. CO2增加的生态效应

VOCABULARY Section A Directions: There 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the one word or phrase that you think best completes the sentences

第四章空间力系 4.1已知F1=100N,F2=300N,F3=200N,作用位 置及尺寸如图(a)所示;