21世纪大学英语助读 Book 1PDF电子书下载

Unit One 1

Text A Secrets of A Students 1

Text B Bittersweet Memories 12

Text C Leaving 20

课本部分练习题参考答案 20

Supplementary Exercises 22

Unit Two 26

Text A Conversational Ballgames 26

Text B English as a Universal Language 38

Text C How to Improve Your Vocabulary 49

课本部分练习题参考答案 50

Supplementary Exercises 52

Unit Three 56

Text A Stevie Wonder: Sunshine in the Shadow 56

Text B We Are What We Think We Are 70

Text C Her Newly-discovered Self 83

课本部分练习题参考答案 84

Supplementary Exercises 86

Unit Four 91

Text A The Washwoman 91

Text B A Good Name 105

Text C This Is Why Jordan Is Jordan 117

课本部分练习题参考答案 119

Supplementary Exercises 121

Unit Five 125

Text A The Language of Compromise 125

Text B Easy Ways to Avoid an Argument 134

Text C Good Morning，Neighbor! 149

课本部分练习题参考答案 150

Supplementary Exercises 153

综合测试一 157

Text A Nerds and Geeks 164

Unit Six 164

Text B Our Changing Lifestyle: Trends and Fads 181

Text C Popularity that Counts 190

课本部分练习题参考答案 191

Supplementary Exercises 193

Unit Seven 197

Text A I Became Her Target 197

Text B Firm，Fair，and Friendly 210

Text C The Magic Pebbles 218

课本部分练习题参考答案 219

Supplementary Exercises 221

Unit Eight 225

Text A Foreword 225

Text B Smart Machines: Our Tireless Helpers 237

Text C The Internet 243

课本部分练习题参考答案 244

Supplementary Exercises 246

Unit Nine 250

Text A Hothouse Earth 250

Text B The Population Problem: Everybody s Baby 261

Text C Dangers to the Environment 271

课本部分练习题参考答案 271

Supplementary Exercises 274

Unit Ten 278

Text A Cloning: Good Science or Baaaad Idea 278

Text B Internet Helps Solve a Medical Mystery 290

Text C Fuzzy Logic Smart Machines 297

课本部分练习题参考答案 298

Supplementary Exercises 300

综合测试二 304

附录一 课文参考译文（ Unit1-10） 311

附录二 同步练习参考答案（Unit1-10） 345

附录三 综合测试答案 350

附录四 INDEX 352