大学英语教程 4 学生用书PDF电子书下载

Contents 1

Unit 1 1

Part Ⅰ Language Skill 1

Part Ⅱ Language in Context 7

Text A Can We Know the Universe? 7

Part Ⅲ Toward Productive Language 20

Text B Our Picture of the Universe 21

Unit 2 30

Part Ⅰ Language Skill 30

Part Ⅱ Language in Context 36

Text A Extraterrestrial Life 36

Part Ⅲ Toward Productive Language 48

Text B UFOs 49

Unit 3 58

Part Ⅰ Language Skill 58

Part Ⅱ Language in Context 65

Text A The Grizzly 65

Part Ⅲ Toward Productive Language 78

Text B Our Disappearing Wildlife 80

Unit 4 89

Part Ⅰ Language Skill 89

Part Ⅱ Language in Context 95

Text A Why Superstitions? 95

Part Ⅲ Toward Productive Language 108

Text B Astrology 109

Part Ⅰ Language Skill 119

Unit 5 119

Part Ⅱ Language in Context 125

Text A One Vote for This Age of Anxiety 125

Part Ⅲ Toward Productive Language 137

Text B The Man in the Water 139

Unit 6 147

Part Ⅰ Language Skill 147

Part Ⅱ Language in Context 153

Text A Symptoms 153

Part Ⅲ Toward Productive Language 165

Text B Cure Yourself of Unhappiness 167

Part Ⅰ Language Skill 175

Unit 7 175

Part Ⅱ Language in Context 182

Text A We Are All Scientists 182

Part Ⅲ Toward Productive Language 194

Text B The Common Language ofScience 195

Unit 8 204

Part Ⅰ Language Skill 204

Part Ⅱ Language in Context 211

Text A ComputerAddicts 211

Part Ⅲ Toward Productive Language 224

Text B Dance of the Electronic Bee 226

Appendix 236

Vocabulary 236