CONTENTSPRELIMINARY PARTUNIT ⅠThe English Alphabet 英语字母表

The Sounds in English 英语国际音标

Lesson One Text

Lesson Two Text

Lesson Three Text

Lesson Four Text

Lesson Five Text

Lesson Six Text

UNIT ⅡLesson Seven：Text：States of Matter

Lesson Eight Text：The Wonderful Worker—

Lesson Nine Text：The Sun’s Family

Lesson Ten Text：What Is an Alloy？

Lesson Eleven Text：The TV Set

Lesson Twe lve Text：Marie Curie

Lesson Thirteen Text：The Surface of the Sea

BASIC PARTUNIT ⅢLesson Fou rteen Text：The Use of Radar

Lesson Fifteen Text：Coal and Oil

Lesson Sixteen Text：A Talk about Laser

UNIT ⅣLesson Seventeen Text：Something about Air

Lesson Eighteen Text：What Is a Sketch？

Lesson Nineteen Text：Light

Lesson Twenty Text：Rock Salt

Lesson Twenty-One Text：Natural and Synthetic

Lesson Twenty-Two Text：Hot Metal

UNIT ⅤLesson Twenty-Three Text：Plastics

Lesson Twenty-Four Text：Sulfa Drugs

Lesson Twenty-Five Text：Bit s of Electricity

Lesson Twenty-Six Text：Sound

Lesson Twenty-Seven Text：The First Radio Wave

Lesson Twenty-Eight Text：Thomas Edison’s

Lesson Twenty-Nine Text：Thomas Edison’s

Lesson Thirty Text：Air Pollution

Appendix 1．Vocabulary List 分课词汇表

2．Reference Materials for Pronunciation

3．Irregular Verbs in Book One

上册不规则动词表4．Materials for Free Reading自由阅读材料

5．Elementary Words基本词汇（供初学者用）

6．Answers to Exercises in Book One

上册练习答案Index Words and Phrases Used in Book One