题目内容

已知25～29岁健康女子怀孕时间长度（从末次月经到婴儿出生）近似正态分布，现调查100名25～29岁健康女子，得到其平均怀孕时间长度均数为280天，标准差为10天，参考值的上限是99.6天，下限是260.4天，这个参考值范围最可能是（）。

A. 单侧99%
B. 双侧99%
C. 双侧95%
D. 单侧95%
E. 双侧90%

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You need to improve the company’s security patch management process. Your solution must meet existing business requirements and it cannot increase the number of employees or unnecessarily increase ongoing administrative effort. What should you do？（）

A. Provide all users with the ability to access and use the Windows Update Web site
B. Upgrade all client computers to either Windows 2000 Professional or Windows XP Professional. Implement Software Update Services （SUS）
C. Upgrade all client computers to either Windows 2000 Professional or Windows XP Professional.Make all users members of the Power Users group on their client computers
D. Install the Active Directory Client Extensions on all Windows 95， Windows 98， and Windows NT Workstation 4.0 computers. Manually download all security patches to a Distributed File System （DFS） replica. Instruct all users to use the DFS replica to install security patches
E. Install the Active Directory Client Extensions on all Windows 95， Windows 98， and Windows NT Workstation 4.0 computers. Install a Software Update Services （SUS） server and make all users local administrators on their client computer

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