Preface to the Fourth Edition As in the previous works, this new edition preserves the content, size, and convenience of this portable reference source for students and workers who use mathematics, while introducing much new material. New in this fourth edition is an expanded chapter­ on series that now includes

1. Pre-reading Activity 2. While-reading Activity 3. Post-reading Activity

Pre-reading Activities Discuss the following questions （1). What are some of the thingsyou think children and theirparents might have different ideasabout?

Pre-reading activities While-reading activities Post-reading activities

1. Pre-reading Activity 2. While-reading Activity 3. Post-reading Activity

The Futurist http://www.wfs.org/futurist.htm, a bi￾monthly magazine of predictions, trends and ideas published since 1967, takes no position on what the future will or should be but acts simply as a clearing house for ideas

一、证券的价格 （一）股票的价格 1、票面价格（Par value） （面值） 2、帐面价格（Book Value)

5.2 Operation Safety regulations In all centrifugal separators the bowl rotates at a very high speed, normally between 100 and l50 revolutions per second. Thus, very great forces are released and it is essential, therefore, to follow strictly the directions given in the Instruction Book concerning assembly of parts, starting, stopping and overhaul

Provide for data logging, remote control and automatic action-pneumatic electro￾pneumatic, and electronic equipment, self￾regulating apparatus, etc. The chapter will give a general instruction above system and function. The other chapters of the book focus on the oil handling devices onboard

成都电子机械高等专科学校：《大学英语》课程教学资源（PPT课件讲稿）Book 1 Unit 2 Sailing Around the World