Part I Listening Comprehension (20 minutes) Directions: In this section, you will hear ten short conversations At the end of each conversation, a question will be asked about what was said. both the conversation and the question will be spoken only once. After each question there will be a pause During the pause, you must read the four choices marked A), B), C)and D),and

46 Electroacoustic Devices P. H. Rogers Transduction Mechanisms. Sensitivity and Source Level. Reciprocity Canonical Equations and Electroacoustic Coupling. Radiation Impedance.Directivity

Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said Both the conversation and the question will be spoken only once. After each question there will be pause. During the pause, you must read the four choices marked), B), C)and D),and

1.初步了解化学反应速率、速率方程、碰撞理论、过渡状态理论和活化能概念；2.理解并会用浓度、温度、催化剂诸因素解释其对化学反应速率的影响；3.初步掌握阿仑尼乌斯公式的应用，会用其求算活化能及某温度下的反应速率；4.理解反应分子数和反应级数的概念，会进行基元反应有关的简单计算；5.初步掌握零级、一级和二级反应的特征。 4.1 化学反应的平均速率和 瞬 时速率 Average rate and instantaneous rate of chemical reaction 4.3 影响化学反应速率的因素 Influential factors on chemical reaction rate 4.2 反应速率理论简介 Brief introductory to reaction rate theory 4.4 化学反应机理及其研究方法 Chemical reaction mechanism and the study methods

Review Show the homework and note book on your desk Practise measurement of attitude of planes and lines in the models

WEEE and RoHS SUD Waste Electrical and Electronic Equipment 废弃电子电气设备 TUV The restriction of the use of PRODUCT SERVICE certain hazardous substances in electrical and electronic equipment

In this unit, you will first listen and then talk about college life read about how much there is to learn in college write about your most memorable examination practice reading skills: reading with a purpose practice forming compound and complex sentences learn to fill in registration forms and design name cards visit culture salon about college life in the United

1. cherish: to care for tenderly; love; to keep a feeling deeply and firmly in mind Examples: The old man cherished the girl as if she were his daughter. The child has been away for more than three years and his parents always cherish the hope that he will come back soon

Basic concepts Basic problem: We measure range and phase data that are related to the positions of the ground receiver, satellites and other quantities How do we determine the \ best position for the receiver and other quantities What do we mean by best \ estimate?

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