全新版 大学英语综合教程全程导读 第3册PDF电子书下载

CONTENTS 1

Unit One Changes in the Way We Live 1

Unit Two Civil-Rights Heroes 43

Unit Three Security 83

Unit Four Extraterrestrials 115

Unit Five How to Celebrate Holidays 150

Unit Six The Human Touch 187

Unit Seven Make a Living 224

Unit Eight Cloning 259