4.1 关系系统 4.2 关系系统的查询优化 4.3 小结

3.6.1 授权 3.6.2 收回权限

3.3.1 概述 3.3.2 单表查询 3.3.3 连接查询 3.3.4 嵌套查询 3.3.5 集合查询 3.3.6 小结

一、概述 二、 传统的集合运算 三、专门的关系运算

1.2 数据模型 1.2.1 概念模型 1.2.2 数据模型的组成要素 1.2.3 最常用的数据模型 1.2.4 层次模型 1.2.5 网状模型 1.2.6 关系模型

The central premise of this issue of the WAKE FOREST LAW REVIEW is that popular media1 can influence behavior in ways that implicate the segments of the legal system that impose liability on those who cause harm to others.2 This Article considers another type of influence that can be traced to popular

一、鼻腔粘膜 二、喉 三、 气 管

（一）分散系统和胶体 Dispersed system and colloid （二）胶体的基本特征 Elementary characteristics

一、Course nature and objective 二、 Teaching methods 三、 Test requirements and form 四、 Scoring system 五、Brief contents

Open systems using gravity tanks, etc., are rarely met nowadays and Figure 1.8 shows a characteristic arrangement of pressure tanks, calorifiers and pumps for a large ship. The fresh water pumps are self-priming, drawing from storage tanks and discharging through filters to a rising main, branched to give a cold supply and a hot supply in closed circuit through a calorifier. A tank kept under pressure by an external supply of compressed air rests on the system and provides the head necessary