滚动体与套圈接触处的法线 与轴承的径向平面之间的 夹角a,称为公称接触角

分离气体混合物吸收;分离液体混合物-蒸馏与萃取 一、取适用范围 相对挥发度a=1的液体混合物(或两相沸点接近)另外还适用于蒸馏的热稳定性很差的物 质、分解或聚合、用萃取分离。如:从发酵液中提取青酶素、咖啡因。 如组分浓度很稀,且沸点较高,用液液萃取较为合适。 如从醋酸水溶液中分离醋酸;从稀醋酸水溶液制备无水醋酸。(因为醋酸浓度很低,用水蒸气 蒸馏、需能量很高,经济上不合理,用萃取合适。如:多种金属物质的分离、钴一镍分离等

Text B 1. some time: a certain period of time e.g. the fire went for some time before it was brought under control. atatad the Cf. sometime: at some uncertain or unstated time in the future or in the past e.g. we'll take our holiday sometime in August. Our house was built sometime around 1905

3.1概述 水在岩土体孔隙中的流动过程称为渗透。岩土体具有渗透的性质称为岩土体的渗透 性。图3.1(a)土石坝渗流的例子,图3.1(b)为随洞开挖时,地下水的渗流。由水的渗透 引起岩土体边 坡失稳、边坡 上游 浸润线 变形、地基变 下游 形、岩溶渗透 塌陷等均属于 线等势线

充分就业有利于经济增长,却不利于国际收支 经济增长 平衡。因为居民有钱了就要购买外国商品,这 国际收支平衡 就会形成国际收支逆差的压力 经济增长不利于物价稳定,会造成通货膨胀 有互补关系,也有交替关A对兄初目标的实现有促进 互补关系是指一个目标的实现 作用,交替关系是指一个目标的实现对另一个目标的实现 有排斥作用

Introduction Trends in food spoilage and sa ther than falling, year by year(e.g. Foods deteriorate as a result of phys hanges, the activities of enzymes and of micro- r approximately doubled between 1983 organisms (Table I). In addition, post-harvest losses in the UK, with substantial economic consequences

5. Oligopoly Oligopoly: Small number of firms: Firms depend on each other. Identical products: Firms jointly face a downward sloping industry demand No entry: Long-run positive profits are possible

Entries Main entries in bold type Additives Beetroot Adenovirus. see viruses Benzo(a)pyrene quinone flatoxin. see moulds Blackberry, see beries Blackcurrant see berries Itermaria, see Moulds

110.2 Catastrophic Failure Models 110.3 The Bathtub Curve 110.4 Mean Time To Failure(MTTF) 110.5 Average Failure Rate 110.6 A Posteriori Failure Probability 110.7 Units for Failure Rates

This paper contains the chapters on public enforcement of law and on criminal law from a general, forthcoming book, Foundations of Economic Analysis of Lany(Harvard University Press, 2003 ). By public law enforcement is meant the use of public law enforcement agents