判例法
You have an Exchange Server 2010 organization named contoso.com.Your company is Investigating a user named User1.You need to prevent User1 from permanently deleting the items in his mailbox. What should you run？（） Set-Mailbox User1 -LitigationHoldEnabled $true。 Set-Mailbox User1 -ModerationEnabled $true。 Set-Mailbox User1 -RetainDeletedItemsUntilBackup $true。 Set-Mailbox User1 -RetentionHoldEnabled $true。
以下属于汽缸盖螺纹损伤的原因的是（）。 装配时螺栓没有拧正。 异物碰撞。 工具使用不当。 汽缸盖过小。
溶血
Cer-tech .com has a server that runs Windows Server 2008. You installed Windows Deployment Services（WDS） role on the server. You decide to install Windows Vista on a computer that does not support Preboot Execution Environment （PXE）. The Windows Vista image is stored on the WDS server. You haveto start the computer and install the Windows Vista image stored on the WDS server. What should you create to achieve this task？（） Image Boost。 Discover image。 PXE drivers image。 WDS image。
对过敏性疾病无治疗作用的药物是（）
