数据库管理系统是对数据库进行管理的软件，位于（）之间。
采用电雷管进行大爆破起爆时，装药前应检测爆区内的杂散电流。杂散电流超过（）时，应采取降低杂散电流强度的有效措施，或改用非电起爆系统。 30mA。 50mA。 100mA。 150mA。
Company has a Catalyst 6500 and you need to configure redundancy between the supervisormodules. With route processor redundancy （RPR+）， the redundant supervisor engine is fullyinitialized and configured， which shortens the switchover time if the active supervisor engine fails.Which three statements are true about the RPR + operations when the redundant supervisorengine switched over the failed primary supervisor engine？（） Static IP routes are maintained across a switchover because they are configured from entries inthe configuration file。 Information about dynamic routing states， maintained on the active supervisor engine， issynchronized to the redundant supervisor engine and is transferred during the switchover。 Information about dynamic routing states， maintained on the active supervisor engine， is notsynchronized to the redundant supervisor engine and is lost on switchover。 The Forwarding Information Base （FIB） tables are cleared on a switchover. As a result， routedtraffic is interrupted until route tables reconverge。 Static IP routes are cleared across a switchover and recreated from entries in the configurationfile on the redundant supervisor engine。 The Forwarding Information Base （FIB） tables are maintained during the switchover. As aresult， routed traffic continues without any interruption when the failover occur。
复述筒式导轴承（外冷式）工作过程。
Certkiller。COM运行Windows Server 2008的域控制器。 Certkiller.COM网络提升40 。Windows Vista的客户机。作为管理员Certkiller，你要部署Active Directory证书服务（AD CS）的授权网络用户发放数字证书。域从一个主力位置，以管理所有机器上的证书设置，你应该怎么做呢（） 配置企业的CA证书设置。 配置企业的信任证书设置。 配置高级CA证书设置。 组策略配置证书设置。 以上全部。
光纤分布式数据接口（FDDI）属于（）
