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【简答题】
如图,已知椭圆 的长轴为AB,过点B的直线 与 轴垂直,椭圆的离心率 ,F为椭圆的左焦点,且 （1）求此椭圆的标准方程; （2）设P是此椭圆上异于A,B的任意一点, 轴,H为垂足,延长HP到点Q,使得HP=PQ,连接AQ并延长交直线 于点 , 为 的中点，判定直线 与以 为直径的圆O位置关系。
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【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
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SQL Server配置管理器
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【多选题】你对文献管理软件了解多少?
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熟悉并掌握endnote使用软件
B.
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【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?
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BizTalkTM Server 2000
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Commerce Server 2000
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Microsoft English Query
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Microsoft OLE DB
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