研究生英语听说教程提高级第四版课后答案

世纪英语听说教程3(第四版)

大连理工大学出版社

Unit 3

Products, Quality and Price

世纪英语听说教程3(第四版)

Contents

Section One

Warm-up Activities

Section Two

In-class Activities

Section Three

After-class Activities

世纪英语听说教程3(第四版)

Warm-up Activities

Useful Expressions Task 1

Directions: Create dialogs with your partner, using the following expressions for products, quality and price. Present one of your dialogs to the class.

Starter ☆ I’ d like some information about your microwave ovens. Response ☆ Well, our most popular model is the B414. It’ s low in price and good in

研究生英语听说教程(第三版)主编 任林静 罗立胜

中国人民大学出版社

Unit 1First Meetings

Section A1. Informal2. Formal

Exercise 1

3. Formal4. Informal

5. Formal

Section A1. This is … Hi…

Exercise 2It’s nice to

2. I’d like you to meet … meet you. 4. Hi,… Yeah, I’m …

3. Hello,… It’s good to meet you. 5. I don’t think we’ve met. I’m … It’s a pleasure to meet you.

Section B1. the weather2. work 3. school 4. the movies

Exercise 1

Section B

Exercise 2

1. It looks like rain. 2. So what do you do? 3. Are you a student? 4. Are you going to see City of Angels?

Section C

Key Words

ice

研究生英语听说教程(第三版)主编 任林静 罗立胜

中国人民大学出版社

Unit 1First Meetings

Section A1. Informal2. Formal

Exercise 1

3. Formal4. Informal

5. Formal

Section A1. This is … Hi…

Exercise 2It’s nice to

2. I’d like you to meet … meet you. 4. Hi,… Yeah, I’m …

3. Hello,… It’s good to meet you. 5. I don’t think we’ve met. I’m … It’s a pleasure to meet you.

Section B1. the weather2. work 3. school 4. the movies

Exercise 1

Section B

Exercise 2

1. It looks like rain. 2. So what do you do? 3. Are you a student? 4. Are you going to see City of Angels?

Section C

Key Words

ice

85

Unit Five Seven Tenets for Establishing New Marital Norms

Seven Tenets for Establishing New Marital Norms

Preparing to Read 1. Do you have a girlfriend or boyfriend now? What’s your expectation about marriage and family? Will you marry? When will you marry? Do you want to have children? How are you going to rear your children?

2. The following is a comparison of statistics about American marriage and family of the year 1960 and 2005. Study these figures carefully, and then describe the marriage and family

trends of the p

研究生英语视听说听力原文

英语听力（课后第四题）

Unit 6 — Business and Economy

4. Shopping Centers in the UK

Tapescript

Dan: Now there are a lot of shopping centres in the UK, and we went to the Canary

Wharf Shopping Complex in East London to talk to some of the shoppers about

what they like or dislike about shopping centres. One man compares the

experiences of shopping centres with shopping at boutiques on a local high

street.

Rob: The high street is the main shopping street in a town or area; in America they

call it ‘main street’. And a boutique is a small

Unit1

1．

欢迎希尔博士和夫人来访上海。 Welcome to Shanghai, Dr. and Mrs. Hill. 2．请允许我做自我介绍。

Please allow me to introduce myself. 3．我叫洪建信，是中美医药公司的副总经理。

My name is Jianxin Hong. I am deputy managing director of the Sino-American Pharmaceutical Co, Ltd.

4. 我们很荣幸能请到您，我也特别高兴能认识您。

It is a great honor to have you here with us .And I am so delighted to make your acquaintance . 5. 我们去取行李吧。

We wil go there and pick up the luggage .

4．久闻先生大名, 我在研究生学习时期所写的两篇论文曾参考了您的研究成果。 I have long heard of you,and as a matter of fact, I referred to your res

绪 论

【0-1】 1m3水中溶解0.05kmol CO2，试求溶液中CO2的摩尔分数，水的密度为100kg/m3。

解 水1000kg/m3?1000kmol/m3 18 CO2的摩尔分数x?0.05?8.99?10?4 10000.05?18【0-2】在压力为101325Pa、温度为25℃条件下，甲醇在空气中达到饱和状态。试求：(1)甲醇的饱和蒸气压pA；(2)空气中甲醇的组成，以摩尔分数yA、质量分数?A、浓度cA、质量浓度?A表示。

解 (1)甲醇的饱和蒸气压pA

lgpA?7.19736?1574.99 p25?238.86A?16.9kPa

(2) 空气中甲醇的组成 摩尔分数 yA?质量分数 ?A?浓度 cA?16.9?0.167

101.3250.167?32?0.181

0.167?32?(1?0.167)?29pA16.9??6.82?10?3 kmol/m3 RT8.314?298质量浓度 ?A?cAMA=6.82?10?3?32?0.218 kg/m3

【0-3】1000kg的电解液中含NaOH质量分数10%、NaCl的质量分数10%、H2O的质量分数80%，用真空蒸发器浓缩，食盐结晶分离后的浓缩液中含NaOH

主编：李光立课文及课后习题解答

新编研究生英语系列教程

研究生英语阅读教程

（提高级/第三版）

Lesson 1Spillonomics: Underestimating Risk (1)

Lesson 2Humbled by Nature, Humble by Culture (9)

Lesson 3How We Broke the Murdoch Scandal (14)

Unit Two Reading Biographies and Personal Recollections

Lesson 4 BillClinton (21)

Lesson 5Steve Jobs (39)

Lesson 6 A Beautiful Mind (42)

Unit Three Reading Essays

Lesson 7 A Christmas Sermon on Peace (57)

Lesson 8Left for Dead (64)

Lesson 9Spell of the Rising Moon (68)

Unit Four Reading Scientific and

Technical Articles

Lesson 10OurPicture of the Uni

《通信原理》习题第一章

第一章习题

习题1.1 在英文字母中E出现的概率最大，等于0.105，试求其信息量。 解：E的信息量：IE?log2

习题1.2 某信息源由A，B，C，D四个符号组成，设每个符号独立出现，其出现的概率分别为1/4，1/4，3/16，5/16。试求该信息源中每个符号的信息量。

解：

IA?log2IB??log21??log2P?E???log20.105?3.25b P?E?11??log2P(A)??log2?2bP(A)4

335?2.415b IC??log2?2.415b ID??log2?1.678b 161616

习题1.3 某信息源由A，B，C，D四个符号组成，这些符号分别用二进制码组00，01，10，11表示。若每个二进制码元用宽度为5ms的脉冲传输，试分别求出在下列条件下的平均信息速率。

（1） 这四个符号等概率出现； （2）这四个符号出现概率如习题1.2所示。

解：（1）一个字母对应两个二进制脉冲，属于四进制符号，故一个字母的持续时间为2×5ms。传送字母的符号速率为

RB?1?100Bd ?32?5?10等概时的平均信息速率为

Rb?RBlog2M?RBlog24?200bs

主编：李光立课文及课后习题解答

新编研究生英语系列教程

研究生英语阅读教程

（提高级/第三版）

Lesson 1Spillonomics: Underestimating Risk (1)

Lesson 2Humbled by Nature, Humble by Culture (9)

Lesson 3How We Broke the Murdoch Scandal (14)

Unit Two Reading Biographies and Personal Recollections

Lesson 4 BillClinton (21)

Lesson 5Steve Jobs (39)

Lesson 6 A Beautiful Mind (42)

Unit Three Reading Essays

Lesson 7 A Christmas Sermon on Peace (57)

Lesson 8Left for Dead (64)

Lesson 9Spell of the Rising Moon (68)

Unit Four Reading Scientific and

Technical Articles

Lesson 10OurPicture of the Uni