4.1 Addition of hx to Alkenes. p100 Hydrohalogenation General reaction mechanism: electrophilic addition Attack of electrophile(such as hBr)on T bond of alkene Produces carbocation and bromide ion Carbocation is an electrophile, reacting with nucleophilic bromide ion

一、n维向量 1.定义 n个有次序的数a1,a2,,an所组成的数 组称为n维向量,这n个数称为该向量的个分量, 第i个数a称为第i个分量

Goal: Give necessary optics background to tackle a space mission, which includes an optical payload Light .Interaction of light w/environment o Optical design fundamentals Optical performance considerations .Telescope types and CCd design interferometer types

Cyclic Codes a cyclic code is a linear block code where if c is a codeword, so are all cyclic shifts of c E.g., 1000, 110, 101,011 is a cyclic code Cyclic codes can be dealt with in the very same way as all other lbc s Generator and parity check matrix can be found a cyclic code can be completely described by a generator string G All codewords are multiples of the generator string In practice, cyclic codes are often used for error detection(CRc) Used for packet networks When an error is detected by the received, it requests retransmission

第一节概述 6.1 Induction This chapter deals with the magnitude and distribution of lateral pressure between a soil mass and an adjoining earth- retaining structure(挡土结构物,俗称 罐麟的结构型式

Learning objectives Introduce explore orthogonality Study the standard oas Practice computing dOF of an experiment Learn how to select a standard oa Introduce means to modify Oas Consider studying interactions in Oas Robust System Design

TEACHING PLAN Unit 3 Paradise Lost Teaching Objectives Master the key words and structures, and learn something about the rainforest The students are required to understand the importance of environmental protection Key Points Vocabulary: absorb, atmosphere, contain, economic establish, greenhouse Impression Process, purchase, rainforest, resource, solution, vary, speed up, no more than Carbon dioxide Structure: It is the modern world that has speeded up It is people themselves who are the biggest cause Language points 1. description: an account of what someone or something is like

§7-1 Internal Energy Heat & Work 内能 功 热量 §7-2 The First Law of Thermodynamics 热力学第一 定律 §7-3 Application of the First Law of thermodynamics 热力学第一定律对理想气体等容、等压和等温过 程的应用 §7-4 The Heat Capacities of an Ideal Gas 理想气体 的热容 §7-5 Application of the First Law to Adiabatic Processes 热力学第一定律对理想气体绝热过程 的应用 §7-6 Cyclical Processes Thermal Efficiency Carnot Cycle Reverse Cycle 循环过程 热机 的效率 卡诺循环 逆循环 §7-7 The Second Law of Thermodynamics热力学 第二定律 §7-8 Reversible & Irreversible Process 可逆过程与不可逆过程、卡诺定理 §7-9 Statistical Meaning of The Second Law 热力学第二定律的统计意义 §7-10 Entropy 熵

Difference between Chinese and english expressions in word order 东南西北 North south east and west 衣食住行 Food clothing, shelter and transportation 水陆交通 Transportation by land and water 田径项目 Track and field events

Section I Use of English Directions: Read the following text. Choose the best word(s)for each numbered blank and mark [a],, [C] or [D] on ANSwER SHEET 1(10 points) The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, this is largely because