●前言
●Unit 1 History of NC and CNC
● Part Ⅰ Technical and Practical Reading
● Passage A:History of Numerical Control
● Passage B:History of Computer Numerical Control
● Part ⅡGlance at a Control Panel
● Part Ⅲ Simulated Writing
● Section A Common Failure Diagnostics
● Section B Have a Try
● Part Ⅳ Communicative Speaking:Meeting Cust omers at the Airport
●Unit 2 Introduction to CNC.
● Part Ⅰ Technical and Practical Reading
● Passage A:Buttons and Switches Found on the Control Panel
● Passage B:The Fundamentals of CNC
● Part ⅡGlance at a Control Panel
● Part Ⅲ Simulated Writing
● Section A Common Failure Diagnostics
● Section B Have a Try
● Part Ⅳ Communicative Speaking:Discussing the Schedule
●Unit 3 Operation Principle of CNC
●......