砂土地层中，开挖深度为14m、地下水位经井点降低至基坑底面以下的基坑，宜采用的支护形式是（ ）。
A、水平挡土板
B、垂直挡土板
C、水泥土搅拌桩
D、土钉墙
泰姬陵被称为“（）”。
金算盘客户账户积分与存款积数的对应关系（）。
A、账户积分=存款积数/36000
B、账户积分=存款积数/365000
C、存款积数=账户积分/36000
D、存款积数=账户积分/36500
中国历史博物馆收藏的各种文物资料截止到1911年，中国革命博物馆收藏的各种文物资料起始时间为1840年。（ ）
A、对
B、错
You work as an Exchange Administrator for Xxx .The company has a Windows 2008 Active Directory-based network.The network contains an Exchange Server 2010 organization.An employee named John has recently left the company.You need to delete the mailbox and the user account for John.You also need to remove the mailbox from the Exchange database.Which of the following commands will you enter in the Exchange Management Shell to accomplish the task？（）
A、Delete-Mailbox -Identity john@TK.com
B、Remove-Mailbox -Identity john@TK.com -Permanent $true
C、Remove-Mailbox -Identity john@TK.com
D、Disable-Mailbox john@TK.com