《大学英语·精读》 修订本 难点要点详解 第4册PDF电子书下载

Unit One Big Bucks the Easy Way 1

Unit Two Deer and the Energy Cycle 38

Unit Three Why Do We Believe That the Earth Is Round? 65

Unit Four Jim Thorpe 90

Unit Five To Lie or Not to Lie—The Doctor's Dilemma 125

Unit Six How to Mark a Book 151

Unit Seven The Luncheon 176

Unit Eight The New Caves 206

Unit Nine Journey West 232

Unit Ten Why People Work 260

Key To Summary Writing 293

Index 300