Greenhouse Glass the material lass transmits Glass absorbs and redirects the longer wavelengths of·nerg Remined longer-wavelength infrard ndation that greenhouse is a made of, 1)transmit \ greenhouse affect short-wavelength visible light, 2)

Cloud albedo forcing: Cooling Shortwave Radiation The shortwave ays from the Sun are scattered in a cloud; many of the rays return to space. The resulting\cloud albedo forcing taken by itself

Water vapor in the air The volume of Water vapor is variable, depending on temperature, precipitation, rate of evaporation and other factors at a particular location The percentage of water vapor ranges from 0.1- 5%. Generally it is 1-3%(the 3rd most abundant constituents in the air)

Unit Seven Section A: A Rose Is a Rose Warm-up questions: 1. What gift will you choose to give your lover on Valentine's Day? And why? 2. Do you know the origin of Valentine's Day?

Unit 2 Sectiona Iron and the Effects of exercise arm-up Qu 1. Why do women often not have enough iron in their bodies? 2. If iron levels are low, what problems can women experience? 3. What can you eat to get enough iron in your daily meals?

Book two Unit si Section a: As his Name Is. so is hel Preview This writer describes ways names can make a difference. When one woman used her middle name, she felt better and her professional achievement improved. A magazine

概述：热处理工艺一般由加热、保温和冷却三个阶段组成，其目的是为了改变金属或合金的内部组织结构，使材料满足使用性能要求。除回火、少数去应力退火，热处理一般均需要加热到临界点以上温度使钢部分或全部形成奥氏体，经过适当的冷却使奥氏体转变为所需要的组织，从而获得所需要的性能。奥氏体晶粒大小、形状、空间取向以及亚结构，奥氏体化学成分以及均匀性将直接影响转变、转变产物以及材料性能。奥氏体晶粒的长大直接影响材料的力学性能特别是冲击韧性。综上所述，研究奥氏体相变具有十分重要的意义。本章重点：奥氏体的结构、奥氏体的形成机制以及影响奥氏体等温形成的动力学因素。本章难点：奥氏体形成机制，特别是奥氏体形成瞬间内部成分不均匀的几个C%点，即C1、C2、C3和C4

本章重点：碳钢两类珠光体(即片状和粒状)的组织形态、形成机制以及力学性能，掌握影响珠光体转变动力学因素。本章难点：珠光体(片状和粒状)的形成机制

CHEMICAL ANALYSIS A SERIES OF MONOGRAPHS ON ANALYTICAL CHEMISTRY AND ITS APPLICATIONS Editor . D. WINEFORDNER Ⅴ OLUME162 A complete list of the titles in this series appears at the end of this volume

1.查阅CRC的 Handbook of Chemistry and physics或者其他化学 手册,计算BaSO4分解为BaO和SOg反应的标准熵变、焓变 和 Gibbs自由能变。分析BaSO在室温下的稳定性,计算热分解 温度