新时代科技英语学生用书PDF电子书下载

CONTENTS 1

Unit 1 Brave New World 1

Text A Some Scientists Suggest Relativity May Be，Well，Relative 1

Text－orientated exerciss 7

Text B Scientists Discover a New Way to Slow Speed of Light 11

Text C Scientists Report Hottest，Densest Matter Ever Observed 16

Unit 2 An Age of Gene 21

Text A Is Race Real？ 21

Text B DNA Power Computing？Could Be？ 31

Text C Scientists Say They’ve Cloned a Horse 37

Unit 3 A Magic of Numbers 43

Text A Maths World Abuzz with Prime Proof 43

Text B Safety in Numbers 52

Text C Beckham in His Prime Number 57

Unit 4 Environmental Protection 63

Text A Pollution Scenario 63

Text－orientated exercises 68

Text B Climate Change Scenario 72

Text C Population Scenario 77

Text A Five Patents That Changed E－Business 83

Unit 5 E－Business 83

Text－orientated exercises 89

Text B Seeking an Edge 93

Text C Making Cents Can Make Sense 99

Unit 6 Economics 105

Text A Politics Rescue Euro From Stability Agreement 105

Text－orientated exercises 111

Text B U.S.－Europe Discord Rocks the Shared Economic Boat 115

Text C Tax Policy That Uses Economies of Scales 121

Text A Twilight of the PC Era？ 127

Unit 7 Information Technology 127

Text－orientated exercises 128

Text B The Lowdown on Downloads 138

Text C Commercial Software Aided Reboot on Mars 144

Unit 8 Health 151

Text A Give More Joy to Your World：Cut Holiday Stress 151

Text－orientated exercises 157

Text B Drug－Free Food 161

Text C You Are Not the Only One 167