Lesson One 2
Text:Can a Computer Think? 11
Lesson Two 11
Text:Star Wars—and Einstein 21
Lesson Three 21
Text:Are There Strangers in Space?Lesson Four 35
Text:Noise and the Worker 47
Lesson Five 47
Text:Alfred Nobel—a Man of ContrastsLesson Six 61
Text:The Years of the Quiet SunLesson Seven 73
Text:A Visitor from the Past 85
Lesson Eight 85
Text:The Discovery of RadioactivityLesson Nine 100
Text:Transport in the Future:Air or Sea?Lesson Ten 117
Text:Saving the Left-overs 133
Lesson Eleven 133
Text:A Robot about the House 151
Lesson Twelve 151
Text:Metals in the Electronic AgeSUPPLEMENTARY READINGSⅠ Why Read Faster? 170
Ⅱ Introduction 174
Ⅲ Filmless Cameras May Lead Next Boom in Pho-tography 181
Ⅳ Interest Is Growing in Plastics That Can Con-duct Electricity 185
Ⅴ The Age of the Sun 188
Ⅵ Big Numbers and Infinities 192
Ⅶ Too Many People? 200
Ⅷ Scientific Knowledge and the Young Scientist 206
Ⅸ Gettysburg Address 212
Ⅹ Dr.Bethune Speaks at the Opening of a New Army Hospital 214
APPENDIXES 220
APPENDIX Ⅰ 220
1．Business Letters 220
2．Abstracts 224
3．Book Reviews 226
4．Instructions to Experiments 231
5．Laboratory Reports 238
6．Instruction Manual 250
APPENDIX Ⅱ 260
Irregular Verbs 260
APPENDIX Ⅲ 261
Vocabulary 261