大学英语系列阅读教程 科技分册PDF电子书下载

Unit One E-mail Phories 1

Unit Two Life Fields 10

Unit Three Endangered Species 19

Unit Four Computer Viruses 29

Unit Five Dolly,You re History 38

Unit Six Heat 47

Unit Seven Oil Spill Prevention 57

Unit Eight Get Ready for Some Wild Weather 66

Unit Nine How Safe Is Your Water 75

Unit Ten AIDS——Acpuired Immune Deficiency Syndrome 85

Unit Eleven Cancer 94

Unit Twelve Mercury 107

Unit Thirteen Mental Illness 117

Unit Fourteen Antilock Brakes:A Potential Lifesaver 129

Unit Fifteen Raising Children s Intelligence 139

Unit Sixteen The Chemistry of Cleaning Clothes 148

Unit Seventeen The Origin of Air 161

Unit Eighteen Uses of Computers in Research 175

Unit Nineteen Carbon Monoxide Detectors 187

Unit Twenty The Plight of the Bumblebee 200

Key to the Exercises 212