21世纪大学英语同步精讲 第1册PDF电子书下载

Unit One 1

Text A Secrets of A Students 1

Ⅰ.Main Idea of the Text 1

Ⅱ.Outline of Each Part 1

Ⅲ.Questions and Answers to Check Students'Preview 1

Ⅳ.Comprehension of the Text 3

Ⅴ.Key to the Exercises of Text A 14

Ⅵ.Translation of Text A 17

Text B Bittersweet Memories 19

Ⅰ.Questions and Answers to Check Students'Preview 19

Ⅱ.Comprehension of the Text 20

Ⅲ.Key to the Exercises of Text B 27

Ⅳ.Translation of Text B 27

Text C Leaving 28

Ⅰ.Questions and Answers to Check Students'Preview 28

Ⅱ.Comprehension of the Text 29

Ⅲ.Key to the Exercises of Text C 31

Ⅳ.Translation of Text C 31

Supplementary Exercises 32

Key to Supplementary Exercises 35

Unit Two 36

Text A Conversational Ballgames 36

Ⅰ.Main Idea of the Text 36

Ⅱ.Outline of Each Part 36

Ⅲ.Questions and Answers to Check Students'Preview 36

Ⅳ.Comprehension of the Text 38

Ⅴ.Key to the Exercises of Text A 50

Ⅵ.Translation of Text A 54

Text B English as a Universal Language 56

Ⅰ.Questions and Answers to Check Students'Preview 56

Ⅱ.Comprehension of the Text 57

Ⅲ.Key to the Exercises of Text B 60

Ⅳ.Translation of Text B 61

Text C How to Improve Your Vocabulary 62

Ⅰ.Questions and Answers to Check Students'Preview 62

Ⅱ.Comprehension of the Text 63

Ⅲ.Key to the Exercises of Text C 65

Ⅳ.Translation of Text C 65

Supplementary Exercises 68

Key to Supplementary Exercises 70

Unit Three 71

Text A Stevie Wonder:Sunshine In the Shadow 71

Ⅰ.Main Idea of the Text 71

Ⅱ.Outline of Each Part 71

Ⅲ.Questions and Answers to Check Students'Preview 71

Ⅳ.Comprehension of the Text 73

Ⅴ.Key to the Exercises of Text A 82

Ⅵ.Translation of Text A 86

Text B We Are What We Think We Are 87

Ⅰ.Questions and Answers to Check Students'Preview 87

Ⅱ.Comprehension of the Text 88

Ⅲ.Key to the Exercises of Text B 96

Ⅳ.Translation of Text B 96

Text C Her Newly-Discovered Self 97

Ⅰ.Questions and Answers to Check Students'Preview 97

Ⅱ.Comprehension of the Text 98

Ⅲ.Translation of Text C 102

Supplementary Exercises 104

Key to Supplementary Exercises 106

Unit Four 107

Text A The Washwoman 107

Ⅰ.Main Idea of the Text 107

Ⅱ.Outline of Each Part 107

Ⅲ.Questions and Answers to Check Students'Preview 108

Ⅳ.Comprehension of the Text 109

Ⅴ.Key to the Exercises of Text A 119

Ⅵ.Translation of Text A 123

Text B A Good Name 125

Ⅰ.Questions and Answers to Check Students'Preview 125

Ⅱ.Comprehension of the Text 125

Ⅲ.Key to the Exercises of Text B 131

Ⅳ.Translation of Text B 131

Text C This Is Why Jordan Is Jordan 133

Ⅰ.Questions and Answers to Check Students'Preview 133

Ⅱ.Comprehension of the Text 133

Ⅲ.Key to the Exercises of Text C 136

Ⅳ.Translation of Text C 136

Supplementary Exercises 137

Key to Supplementary Exercises 139

Unit Five 141

Text A The Language of Compromise 141

Ⅰ.Main Idea of the Text 141

Ⅱ.Outline of Each Part 141

Ⅲ.Questions and Answers to Check Students'Preview 141

Ⅳ.Comprehension of the Text 142

Ⅴ.Key to the Exercises of Text A 153

Ⅵ.Translation of Text A 157

Text B Easy Ways to Avoid an Argument 159

Ⅰ.Questions and Answers to Check Students'Preview 159

Ⅱ.Comprehension of the Text 160

Ⅲ.Key to the Exercises of Text B 168

Ⅳ.Translation of Text B 168

Text C "Good Morning，Neighbor!" 170

Ⅰ.Questions and Answers to Check Students'Preview 170

Ⅱ.Comprehension of the Text 171

Ⅲ.Key to the Exercises of Text C 174

Ⅳ.Translation of Text C 174

Supplementary Exercises 175

Key to Supplementary Exercises 177

Unit Six 179

Text A Nerds and Geeks 179

Ⅰ.Main Idea of the Text 179

Ⅱ.Outline of Each Part 179

Ⅲ.Questions and Answers to Check Students'Preview 179

Ⅳ.Comprehension of the Text 180

Ⅴ.Key to the Exercises of Text A 192

Ⅵ.Translation of Text A 195

Text B Our Changing Lifestyle:Trends and Fads 197

Ⅰ.Questions and Answers to Check Students'Preview 197

Ⅱ.Comprehension of the Text 197

Ⅲ.Key to the Exercises of Text B 201

Ⅳ.Translation of Text B 202

Text C Popularity That Counts 204

Ⅰ.Questions and Answers to Check Students'Preview 204

Ⅱ.Comprehension of the Text 205

Ⅲ.Key to the Exercises of Text C 208

Ⅳ.Translation of Text C 208

Supplementary Exercises 209

Key to Supplementary Exercises 211

Unit Seven 213

Text A I Became Her Target 213

Ⅰ.Main Idea of the Text 213

Ⅱ.Outline of Each Part 213

Ⅲ.Questions and Answers to Check Students'Preview 213

Ⅳ.Comprehension of the Text 215

Ⅴ.Key to the Exercises of Text A 228

Ⅵ.Translation of Text A 231

Text B Firm,Fair,and Friendly 232

Ⅰ.Questions and Answers to Check Students'Preview 232

Ⅱ.Comprehension of the Text 233

Ⅲ.Key to the Exercises of Text B 239

Ⅳ.Translation of Text B 239

Text C The Magic Pebbles 240

Ⅰ.Questions and Answers to Check Students'Preview 240

Ⅱ.Comprehension of the Text 241

Ⅲ.Key to the Exercises of Text C 245

Ⅳ.Translation of Text C 245

Supplementary Exercises 246

Key to Supplementary Exercises 248

Unit Eight 250

Text A Foreword 250

Ⅰ.Main Idea of the Text 250

Ⅱ.Outline of Each Part 250

Ⅲ.Questions and Answers to Check Students'Preview 251

Ⅳ.Comprehension of the Text 252

Ⅴ.Key to the Exercises of Text A 268

Ⅵ.Translation of Text A 270

Text B Smart Machines:Our Tireless Helpers 272

Ⅰ.Questions and Answers to Check Students'Preview 272

Ⅱ.Comprehension of the Text 273

Ⅲ.Key to the Exercises of Text B 279

Ⅳ.Translation of Text B 279

Text C The Internet 280

Ⅰ.Questions and Answers to Check Students'Preview 280

Ⅱ.Comprehension of the Text 281

Ⅲ.Key to the Exercises of Text C 283

Ⅳ.Translation of Text C 283

Supplementary Exercises 284

Key to Supplementary Exercises 286

Unit Nine 288

Text A Hothouse Earth 288

Ⅰ.Main Idea of the Text 288

Ⅱ.Outline of Each Part 288

Ⅲ.Questions and Answers to Check Students'Preview 288

Ⅳ.Comprehension of the Text 290

Ⅴ.Key to the Exercises of Text A 303

Ⅵ.Translation of Text A 307

Text B The Population Problem:Everybody's Baby 309

Ⅰ.Questions and Answers to Check Students'Preview 309

Ⅱ.Comprehension of the Text 310

Ⅲ.Key to the Exercises of Text B 315

Ⅳ.Translation of Text B 315

Text C Dangers to the Environment 316

Ⅰ.Questions and Answers to Check Students'Preview 316

Ⅱ.Comprehension of the Text 317

Ⅲ.Key to the Exercises of Text C 319

Ⅳ.Translation of Text C 319

Supplementary Exercises 320

Key to Supplementary Exercises 322

Unit Ten 324

Text A Cloning:Good Science or Baaaad Idea 324

Ⅰ.Main Idea of the Text 324

Ⅱ.Outline of Each Part 324

Ⅲ.Questions and Answers to Check Students'Preview 324

Ⅳ.Comprehension of the Text 326

Ⅴ.Key to the Exercises of Text A 338

Ⅵ.Translation of Text A 342

Text B Internet Helps Solve a Medical Mystery 344

Ⅰ.Questions and Answers to Check Students'Preview 344

Ⅱ.Comprehension of the Text 345

Ⅲ.Key to the Exercises of Text B 351

Ⅳ.Translation of Text B 351

Text C Fuzzy Logic Smart Machines 353

Ⅰ.Questions and Answers to Check Students'Preview 353

Ⅱ.Comprehension of the Text 353

Ⅲ.Key to the Exercises of Text C 355

Ⅳ.Translation of Text C 355

Supplementary Exercises 356

Key to Supplementary Exercises 358