【单选题】A random sample of shoppers responded to the questions contained in a marketing survey. Six months later, another random sample of shoppers responded to exactly the same questions, except that the que...
A.
The reordering of the questions did not put each question in a different sequential position from its position six months previously.
B.
Shoppers who respond to a marketing survey do not generally remember six months later what responses they gave.
C.
There was no motive for the second survey except that of discovering whether the ordering of the questions mattered.
D.
The survey was not composed of questions to which shoppers would give different responses at different times of the year.
E.
The first sample of shoppers did not have any individuals in common with the survey sample of six months later.
【单选题】________ 工具是 Microsoft SQL Server 2008 提供的集成环境,这种工具可以完成访问、配置、控制、管理和开发 SQL Server 的所有工作。
A.
Microsoft SQL Server Management Studio
【单选题】Microsoft SQL Server 2000和下列哪—个产品集成使用,可以支持贸易伙伴之间的交流?
C.
Microsoft English Query
【判断题】EDI主要应用于旅游企业和游客之间的商务活动
【单选题】水样不经消化,用二氨基萘荧光光度法直接测定出的硒为
【单选题】Photoshop中用以下哪些格式存储图像文件后可保留Alpha通道?