一、定位误差的产生 1． 基准不重合误差 工件的定位基准与设计基准不重合时产生的加工误差称为基准不符误差，用 ΔB 表示。 基准不重合误差的大小等于定位基准与设计基准之间的尺寸公差。即： ΔB ＝δ L

The Anti-Theoretical Nature of Civil Law Contract Scholarship and the Need for an Economic Theory Aristides N. Hatzis Abstract The absence of theories developed for Roman law and the absence of grand theories in Civil contract law scholarship v outcomes of a particularistic ap- proach to the problems created by the d iencies of markets and driven by the need for the cons conducive to economic progress. the selection of efficient everal centuries and stabi-

Readers are reminded that this work is protected by copyright. While they are free to use the ideas expressed in it, they may not copy, distribute or publish the work or part of it, in any form, printed electronic or otherwise, except for reasonable quoting, clearly indicating the source. Readers are permitted to make copies, electronically or printed, for personal and classroom use. Contents

常规检查，由于CT的密度分辨率高，对软组织的显示优 于常规X线检查。 增强CT扫描检查，除能分辨血管的解剖结构外，还能观 察血管与病灶之间关系，病灶部位的血供情况和血液动力学 的变化。 因为轻微活动会造成伪影，使图像难以诊断，除取得患 者合作外，对难于合作的患者或儿童需给予镇静剂或麻醉

Readers are reminded that this work is protected by copyright. While they are free to use the ideas expressed in it, they may not copy distribute or publish the work or part of it, in any form, printed, electronic or otherwise, except for reasonable quoting, clearly indicating the source. Readers are permitted to make copies, electronically or printed, for personal and classroom use

一、定义 维生素(vitamin)是机体维持正常功能所必需,但在体内不能合成或合成量很少,必须由食物供给的一组低分子量有机物质

蛋白质的生物合成，即翻译，就是将核酸中由4种核苷酸序列编码的遗传信息，通过遗传密码破译的方式解读为蛋白质一级结构中20种氨基酸的排列顺序

转录 (transcription)生物体以DNA为模板合成RNA的过程

第一节 包合物 第二节 固体分散体

一．定义：是一种合约，承诺买方在规定的时期内按规定的价格从卖方购买或卖给卖方一定资产。 立权人：期权的卖方 期权价格：是卖方向买方收取的权力金 施权价：合约中规定的买卖资产的价格 二．分类： ⑴看涨和看跌期权：又称买权和卖权，授予买方的权力是买还是卖而分的