“灰”的主要含义是什么？
真空下降原因？
用反射波法测桩时，灌注桩桩头表面的疏松层对反射波影响（）。 ["严重","较大","轻微","没有"]
财务管理假设一般包括如下几项（） ["理财主体假设","持续经营假设","有效市场假设","资金增值假设","理性理财假设"]
Your network contains a single Active Directory domain named contoso.com. The domain contains two domain controllers named DC1 and DC2 that run Windows Server 2008 R2. DC1 hosts a primary zone for contoso.com. DC2 hosts a secondary zone for contosto.com. On DC1， you change the zone to an Active Directory-integrated zone and configure the zone to accept secure dynamic updates only. You need to ensure that DC2 can accept secure dynamic updates to the contoso.com zone. Which command should you run（） ["dnscmd.exe dc2.contoso.com \/createdirectorypartition dns.contoso.com","dnscmd.exe dc2.contoso.com \/zoneresettype contoso.com \/dsprimary","dnslint.exe \/ql","repadmin.exe \/syncall \/force"]
Access用户操作界面中的“工作区”也称为（）。
