 Polymorphism of iron  Structure and property of each component in Fe-Fe3C diagram.  Establishment and anysis of Fe - Fe3C .  The effect of carbon concentration on material structure and property.  Application of Fe - Fe3C diagram

The stories of this unit demonstrate how things are not al ways as easy as they look; the grass is not lways greener on the other side. After learning it, Ss should be able to have a better learning of the hardships and problems of studying and living in a new country appreciate the text structure( paragraph structure as a general statement supported by some master the usage of the key words and expressions

The principal-agent problem The principal-agent problem describes a class of interactions between two parties to a contract, an agent and a principal. The legal origin of these terms suggests that the principal engages the agent to act on his(the principals) behalf. In economic applications, the agent is not necessarily an employe of the principal. In fact, which of two individuals is regarded as the agent and which as the principal depends on the nature of the incentive problem

defense system that has evolved to protect animals from invading pathogenic microorganisms and ancer. It is able to generate an enormous variety of cells and molecules capable of specifically recognizing and eliminat ing an apparently limitless variety of foreign invaders. These cells and molecules act together in a dynamic network whose omplexity rivals that of the nervous system. Functionally, an immune response can be divided into two related activities--recognition and response. Immune

Chapter One Outline of International Exchange Chapter Two Methods of Remittance Chapter Three Reimbursement of Remittance Cover(汇款的偿付) Chapter Four Application of remittance in international trade

1.1 Definition of tall buildings 1.2 Development of tall buildings 1.3 Development of structural systems of tall buildings 1.4 The structural characteristics of tall buildings

21.2 The compounds of chromium 21.1 The elemental substances of Cr, Mo and W 21.3 The elemental substance of Mn 21.4 The compounds of manganese

15.5 The compounds of As, Sb and Bi 15.4 The compounds of phosphorus 15.3 The compounds of nitrogen 15.2 The elemental substances of nitrogen family 15.1 Outline on nitrogen family

14.5 The compounds of tin and lead 14.4 The compounds of silicon 14.3 The compounds of carbon 14.2 The elemental substances of carbon family 14.1 Outline on carbon family

§2.2 Thermochemistry §2.3 Direction of a chemical reaction To study chemistry using the theories and methods of thermodynamics 1) heat exchange in chemical reactions 2) directions and extent of reaction processes §2.1 the First law of thermodynamics