Preface 1.1 Chemistry---the central science full of practicability and creativity 1.2 Features of chemical changes 1.3 History,revival and development of inorganic chemistry 1.4 How to study easily while efficiently inorganic chemistry1.1 Chemistry---the central science full of practicability and creativity 1.2 Features of chemical changes 1.3 History, revival and development of inorganic chemistry 1.4 How to study easily while efficiently inorganic chemistry Preface