一步高英语听力PDF电子书下载

Lesson One Miami and Miami Beach 1

Lesson Two San Francisco,a City By the Bay 10

LessON Three Merida 19

Lesson Four Switzerland 29

Lesson Five Las Vegas 38

Lesson Six Maui 52

Lesson Seven Intelligent Loudspeakers 81

Lesson Eight Light at the Service of Electronics 92

Lesson Nine An Electronic Bomb Sniffer and a Robot that Sees 102

Lesson Ten Adapting to a New World 111

Lesson Eleven Learning and New Technologies 121

Lesson Twelve Aging and Memory 132

Lesson Thirteen Female Body and Male Body 143

Lesson Fourteen Sex Differences in the Brain 162

Lesson Fifteen Psychology,Sex and Society 178

Lesson Sixteen Natural Gas 195

Lesson Seventeen Tidal Power 209

Lesson Eighteen Green Fuel 222

练习参考答案 235

课文参考译文 265

词汇表 314