Comtents
Unit 1 A Clean World or a Polluted World?
Unit 2 The Web Lifestyle
Unit 3 The International Space Station
Unit 4 The Age of Cloning
Unit 5 Genetic Discovery Brines Worries as Well as Hope
Unit 6 Classification of Small Dams
Unit 7 Chinese Gardens
Unit 8 The Internet Pushes News Out,You and Computers Are Pulling It Down
Unit 9 Civil Engineering
Unit 10 What Are Computers ?
Unit 11 Green Buildings
Unit 12 The Method of Scientific Investigation
Unit 13 A Theory About Genius
Unit 14 The Costs of Safety
Unit 15 Patents and Inventions
Key to Exercises
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Unit 10
Unit 11
Unit 12
Unit 13
Unit 14
Unit 15
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