Unit 1．Go to Bed;Get a Good Night's Dream 1
Unit 2．Amaranth,a Promising Food Crop 10
Unit 3．He Saw Texas First 18
Unit 4．Earth Resources Technology Satellites 28
Unit 5．American Education Today 37
Unit 6．Winds and Weather 47
Unit 7．Seeds for the Future 56
Unit 8．Improving Industrial Efficiency through Robotics 65
Unit 9．Disaster in Dayton 73
Unit 10．Lasers,Superlight 81
Unit 11．Clara Barton—A Best-loved Person in the World 89
Unit 12．Oil 100
Unit 13．How to Remember:Some Basic Principles 111
Unit 14．Geology and Geophysics 120
Unit 15．On Learning How to Write 130
Unit 16．The Day the Big Top Burned 139
Unit 17．Mark Twain's Speechmaking Strategy 149
Unit 18．Widespread Effects of Air Pollution 158
Unit 19．Is Your Judgment Warped? 169
Unit 20．Comets:As Close to Nothing As You Can Get 179
Unit 21．Which Career Is the Right One For You? 188
Unit 22．Earthquake Forecasting And Control 200
Unit 23．Informing the World 210
Unit 24．Sunsports:A Potential Force in Determining World Climates 220
Unit 25．Business Administration 229
Unit 26．New Babies Are Smarter than You Think 240
Unit 27．Who Knows? 252
Unit 28．Handling the Knowledge Explosion 264
Unit 29．From Brush Huts to Skyscrapers 274
Unit 30．How to Live 24 Hours a Day 285
Answer Key 298