Unit 1 The Age of Robots 1
Ⅰ．Teaching Content 1
Ⅱ．Key to Exercises 7
Ⅲ．Translation of the Texts 18
Unit 2 Nuclear Radiation 21
Ⅰ．Teaching Content 21
Ⅱ．Key to Exercises 26
Ⅲ．Translation of the Texts 39
Unit 3 Food Safety 43
Ⅰ．Teaching Content 43
Ⅱ．Key to Exercises 51
Ⅲ．Translation of the Texts 60
Unit 4 The Use of Nanotechnology 64
Ⅰ．Teaching Content 64
Ⅱ．Key to Exercises 70
Ⅲ．Translation of the Texts 86
Unit 5 The World Wide Web 89
Ⅰ．Teaching Content 89
Ⅱ．Key to Exercises 96
Ⅲ．Translation of the Texts 102
Unit 6 Global Warming 106
Ⅰ．Teaching Content 106
Ⅱ．Key to Exercises 112
Ⅲ．Translation of the Texts 120
Unit 7 The Universe 123
Ⅰ．Teaching Content 123
Ⅱ．Key to Exercises 131
Ⅲ．Translation of the Texts 139
Unit 8 Biology and Our Life 142
Ⅰ．Teaching Content 142
Ⅱ．Key to Exercises 147
Ⅲ．Translation of the Texts 160