英语第3册 冶金类 教师参考书PDF电子书下载

Preface 1

Lesson One Man-made Materials 3

Lesson Two Fire 18

Lesson Three The Influence of Metallurgy on Civilization 41

Lesson Four Metallurgy and Engineering 58

Lesson Five Lead-One of the Heaviest Metals 72

Lesson Six Iron and Iron Rust 88

Lesson Seven Cost of Corrosion 111

Lesson Eight Advantages and Limitations of Powder Metallurgical Methods 125

Lesson Nine Equilibrium 141

Lesson Ten Mechanical Working of Metals 158

Lesson Eleven Metals and Non-metals 181

Lesson Twelve From Rails to Needles 192