[科技英语读本]·下集·科学技术文献社版

【科技英语读本】下集 - 科学技术文献.pdfSCIENTIFIC AND TECHNICAL ENGLISHREADER BOOK 潘能华威 张传德孙玉麟编 王珍珠(MargaretWang)审校CONTENTS Lesson One Text:Man-made Fibres Grammar:分词的时态 Lesson.Two Text:Microscopes and Medicine Grammar:“AS”的用法 Lesson Three Text:Fire Grammar:句子成分的分隔 Lesson Four Text:Extremely Useful Radioisotopes Grammar:动词不定式的时态 Lesson Five Text:Numbers and Mathematics 7.LessonOne Man-made Fibers Wool,.cotton,silk,and flax.are the classicfibers which have a natural originand whose proven qualities we have made use of in a variety of ways for centuries.They are converted into textiles by processes which begin with spinning into yarn².
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