题目内容

某防疫站调查甲、乙两小学一年级学生蛔虫感染率均为33％，但甲校抽查250人，乙校抽查150人，两校一年级学生蛔虫感染率95％可信区间为（）

A. 甲校较乙校范围大
B. 乙校较甲校范围大
C. 甲校较乙校可信度高
D. 乙校较甲校可信度高
E. 不具可比性

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Your company has 250 branch offices. Your network contains an Active Directory domain. The domain controllers run Windows Server 2008 R2. You plan to deploy Read-only Domain Controllers （RODCs） in the branch offices. You need to plan the deployment of the RODCs to meet the following requirements： èBuild each RODC at the designated branch office. èEnsure that the RODC installation source files do not contain cached secrets. èMinimize the bandwidth used during the initial synchronization of Active Directory Domain Services （AD？DS）. What should you include in your plan？（）

A. Use Windows Server Backup to perform a full backup of an existing domain controller. Use thebackup to build the new RODCs.
B. Use Windows Server Backup to perform a custom backup of the critical volumes of an existing domain controller. Use the backup to build the new RODCs.
Create a DFS namespace that contains the Active Directory database from one of the existing domain controllers. Build the RODCs by using an answer file.
D. Create an RODC installation media. Build the RODCs from the RODC installation media.

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