影响土壤比重的因素: 土壤比重仅仅取决于土壤固相颗粒的物质组成。 Since a large portion of most soils is composed of particles derived from quartz minerals, the particle density of most soils is near 2.6 g/cc which is the density of quartz. Variations in the particle density are due to the presence of heavier minerals like iron oxides or lighter organic components

Computer networks are geographically distributed collections of communication links and switching proces￾sors, the purpose of which is to transport data between computers, workstations, and terminals. In general the elements of a computer network must follow compatible rules of operation together to function effectively. These rules of operation are known as protocols

The true language of computers is a stream of 1s and 0s—bits. Everything in the computer, be it numbers or text or program, spreadsheet or database or 3-D rendering, is nothing but an array of bits. The meaning of the bits is in the “eye of the beholder”; it is determined entirely by context. Bits are not a useful medium for human consumption. Instead, we insist that what we read be formatted spatially and presented

1. Historical background: (1) The Hundred Years War: The result of the war was an awakening of national consciousness in England. And the French language was gradually replaced by English native tongue. (2) The peasant uprising of 1381: It was the result of the conflict between the peasants and feudal lords

第一节 核酸的化学组成及其一级结构 The Chemical Component and Primary Structure of Nucleic Acid 第二节 DNA的空间结构与功能 Dimensional Structure and Function of DNA 第三节 RNA的结构与功能 Structure and Function of RNA 第四节 核酸的理化性质 The Physical and Chemical Characters of Nucleic Acid 第五节 核酸酶 Nuclease

Wet milling of cereal grains differs fundament￾ally from dry milling in being a maceration process in which physical and chemical changes occur in the nature of the basic constituents - starch, protein and cell wall material - in order to bring about a complete dissociation of the endosperm cell contents with the release of the starch granules from the protein network

 Gross profit and cost of goods sold  The basic concepts of inventory accounting  Cost of merchandise acquired  Principal inventory valuation methods  The importance of gross profits

Classification of folds (continue) Based on four main features or properties: 1 direction of closing and facing 2 attitude of axial surface 3 size of inter-limb angle, and 4 shape of profile 5 dip isogons

D|C是一种继发性的,以广泛微血栓形成并相继出现止、凝血功 能障碍为病理特征的临床综合症。 DIC is a pathological syndrome that results from the disturbance of kinetic balance of coagulation and fibrinolytic processes It is characterized by the activation of the coagulation system with resultant consumption of a variety of coagulation proteins and platelets, which results in hemorrhagic diathesis and ischemic injury to various tissues

1.1 Manufacturing Process 1.2 The function and design method of process planning file 1.3 Selection of positioning reference 1.4 Design of process planning 1.5 Plan the metal removal 1.7 The determination of operational dimensions 1.6 Dimensional Chains 1.8 Standard machining time and economic analysis