selects

The next section of code determines if the user is new or not, and either selects the user's ID from the database if they already exist, or adds it to the database if they do not.

下面一段代码确定用户是否为新用户，如果用户ID已存在，那么从数据库中选择用户ID，否则，将用户ID添加到数据库。

The present paper selects accounting informatization of enterprises as the major subject, exploring its current situation and issues and trying to weigh the investment-profit in scientific ways.

本文选取企业会计信息化为主要研究对象，探寻其目前存在的现状和问题，并试图通过科学的方法对投入效益进行衡量。

According to the characteristics of Guangxi geo-environment, this paper selects various patterns to line with local conditions to put forward land consolidation of rural residential area, and promote the sustainable use of land resource in Guangxi.

针对广西的地理环境特点，可因地制宜地选择不同的模式推行农村居民点土地整理工作，进而促进广西土地资源的可持续利用。