Unit One Telecommunications 1
Unit Two Weight On and Off the Earth 12
Unit Three Steel 22
Unit Four Problems of Space Travel 33
Unit Five Nuclear Power 44
Unit Six The First Aeroplanes 54
Unit Seven Oil 65
Unit Eight Thomas Edison's Inventions 76
Unit Nine Civil Engineering 86
Unit Ten Bees and Colour 99
Unit Eleven Electronics 109
Unit Twelve How Computer Viruses Work 121
Unit Thirteen Shipbuilding 132
Unit Fourteen The Beginning of the Air Mail 143
Unit Fifteen Lasers 152
Unit Sixteen Atoms and Elements 164
Unit Seventeen Statistics 175
Unit Eighteen Dinosaurs——Their Discovery and Their World 186
Unit Nineteen Plastics 198
Unit Twenty Anaesthetics 210
Appendix:Vocabulary of Science＆Technology 219
Keys to Preparation for CET 237
References 239