大学英语自学导读 4PDF电子书下载

Unit One Big Bucks the Easy Way 1

Unit Two Deer and the Energy Cycle 30

Unit Three Why Do We Believe That the Earth Is Round? 52

Unit Four Jim Thorpe 73

Unit Six To Lie or Not to Lie The Doctor's Dilemma 103

Unit Seven The Luncheon 146

Unit Eight The New Caves 174

Unit Nine Journey West 202

Unit Ten Why People Work 227

Key To Text Learning 258

Index 266