重点介绍木材三大成分木质素、纤 维素及半纤维素的的结构、物理性质、 化学性质。并简要介绍木材中的抽提物 、木材的酸碱性质

3.1木材细胞的生成 3.2木材细胞结构 3.3细胞壁上的结构特征

本章简要介绍木材的命名,着重介绍树木的生 长、木材的形成及树干的构造,并对幼龄材的形成 机理、幼龄材的性质与识别进行了论述

Customary international law is an enigma It is produced by the decentralized actions of states, and it generally lacks centralized enforcement mechanisms. Political science realists and some rationalist legal scholars argue that customary international law cannot affect state behavior: that it is\epiphenomenal.\ This article develops a model of an n-player prisoner's dilemma in the customary international law context that shows that it is plausible that states would comply with customary international law under certain

1 Introduction Background for New methodology Modern natural science methodology is mainly based on matter and energy Even though matter and energy are still necessitate factors in information system, yet the characteristic feature of information systems, particularly the complex ones, is neither matter nor energy but information Without information, the complex information systems, like brain and intelligent life. cannot be understood

An introduction to Western Social Theory e l.The significance of studying western social theory e1. 1 The developing tendency of social science =1. 2 The sociology's researching target 3.1.3 The independence of sociology

R.H. Whitakker Science 163: 150-160.1969 原核生物界 Monera:细菌、放线菌等 原生生物界 Protista:藻类、原生动物、粘菌等 真菌界 Fungi:酵母、霉菌

1. When you can measure what you are speaking about, and can express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowleage is of a meagre and unsatisfactory kind: It may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the stage of science. Lord Kelvin, a physicist

Department of Electrical Engineering and Computer Science 6.003: Signals and Systems -Fal 2003 Final Exam Tuesday, December 16, 2003 Directions: The exam consists of 7 problems on pages 2 to 33 and additional work space on pages 34 to 37. Please make sure you have all the pages. Tables of Fourier serie properties, CT and dT Fourier transform properties and pairs, Laplace transform

Department of Electrical Engineering and Computer Science 6.003: Signals and Systems-Fall 2003 LIVE Tuesday, October 14, 2003 Directions: The exam consists of 5 problems on pages 2 to 19 and work space on pages 20 and