文档介绍：软件工程需求分析
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. gle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
小组成员：许冰玉 李世杰
刘祥宇
1 引言
编写目的
背景
随着计算机和网络的日趋普及，越来越多的商家在网上升起商店，向消费者展示出一片新鲜的购物大地。在美、日等信息化程度较高的国家和地区，网络商店开展速度迅猛，美国的世界级超一流的零售商，如沃尔玛凯玛特，家庭仓储、科罗格、。调查说明：美国的家庭已越来越****惯于在家中从网上购物。
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is fr