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

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

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

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

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

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

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

一、木材的视觉特性 二、木材的触特性 三、木材的湿度调节 四、木内间声受质 五、木材的生物体调节特性

一、简介 二、摘录范围 三、出版形式 四、4个分辑 五、内容编排 六、检索方法 七、检索实例

Unit Two Text B 1. Pre-reading Ta 1. How did the first american music begin? Why do so many people around world love American music? 3. What role does modern science play in the development of American music? 4. When and where did the word \music!\first appear in the American history?