CONTENTS 1
Unit One Warming-up Lessons 1
Lesson One 1
Lesson Two 11
Lesson Three 20
Lesson Four 29
Lesson Five 38
Unit Two Fundamental Computer and Network Knowledgo 52
Lesson One 52
Lesson Two 62
Lesson Three 73
Lesson Four 82
Lesson Five 90
Lesson Six 99
Revision（1） 106
Lesson Seven 108
Lesson Eight 117
Lesson Nine 126
Lesson Ten 133
Revision（2） 141
Unit Three Software Knowledge 142
Lesson One 142
Lesson Two 150
Lesson Three 157
Lesson Four 165
Vocabulary List 174
Appendix 1 196
Appendix 2 199
Appendix 3 202