英语 工科类 上PDF电子书下载

Lesson One 1

Lesson Two 12

Lesson Three 25

Lesson Four 35

Lesson Five 49

Lesson Six 63

Lesson Seven 73

Lesson Eight 85

Lesson Nine 97

Review One 110

Lesson Ten 114

Lesson Eleven 127

Lesson Twelve 138

Lesson Thirteen 153

Review Two 167

Lesson Fourteen 171

Lesson Fifteen 183

Lesson Sixteen 195

Lesson Seventeen 208

Lesson Eighteen 221

Review Three 233

Lesson Nineteen 237

Lesson Twenty 249

Lesson Twenty-one 263

Lesson Twenty-Two 278

Lesson Twenty-Three 293

Lesson Twenty-Four 304

Lesson Twenty-Five 317

Review Four 331

Supplementary Reading 337

Ⅰ．Engineering and the Sciences 337

Ⅱ．The Main Tasks of an Engineer 338

Ⅲ．Engineering:The Application of Scientific Principles 340

Ⅳ．Mechanical Engineering 341

Ⅴ．The Nature of Material Science 342

Ⅵ．The fifth Force 343

Ⅶ．A Proposed Space Plane 344

Ⅷ．Progress of Science and Technology Supporting Information Channeling 345

后记 347