Today’’s lecture we’’ll center on the prehistoric people of Nevada Desert. Now most of these prehistoric desert people (36)______the countryside throughout the year. You might think that they’’re wandering aimlessly. Far from it, they actually followed the (37)______of carefully planned moves. Where they moved depended on where food was (38)______. Places where plants were ripening or fish were (39)______. Now often when these people moved, they carried all their (40)______on their backs. But if the journey was long, extra food and tools were sometimes stored in caves or (41)______rocks. One of these caves is now an exciting (42)______ site. Beyond its small opening is a huge underground (43)______. Even though the cave is very large. It was certainly too dark and dusty for the travelers to (44)____________. But it was a great place to (45)____________. And tremendous amounts of food supplies and artifacts have been found there.The food includes dried fish, seeds and nuts. The artifacts include stone spear points and (46)____________. The spear points are actually rather small. Here is a picture of some that were found. You can see their size in relation to the hands holding them.

阅读以下说明，回答问题1至问题3。
[说明]
某公司用ASP+SQL Server开发的电子商务网站系统提供商品查询、网上购物车、订单管理、后台商品管理、在线支付等功能。系统的数据库名为shangwu，所在服务器 IP地址为211.54.32.21，其中user表存放注册用户名和密码，结构如表3-1所示：
表3-1

[问题1] 数据库设计的基本步骤一般包括：需求分析、概念设计、逻辑设计和物理设计四个阶段，请根据数据库设计四个阶段的特点，确定以下工作分别属于哪个阶段。