压力容器的紧螺栓联接中,若螺栓的预紧力和容器的压强不变,而仅将凸缘间的铜垫片换成橡胶垫片,则螺栓所受的总拉力Qb()和联接的紧密性()。
库房内档案装具布置应成行地垂直或平行于有窗的墙面。
A、对
B、错
已知某一元弱酸的浓度为0.010mol/L,pH=4.55,则其电离常数Ka为:()
A、5.8×10-2
B、9.8×10-3
C、8.6×10-7
D、7.9×10-8
Recordset对象使用过open方法后如果我们需要再次使用它的话,必须要()它,使用的语句是:()。
Which Cisco CRS 4.0 server configuration task enables the Cisco CRS server to fail over to a secondary Cisco Unified CallManager when the primary Cisco Unified CallManager fails?()
A、The LDAP directory must have a secondary profile configured.
B、No special configuration is required. Cisco Unified CallManager maintains the failover.
C、The JTAPI provider on the Cisco CRS server must be configured with the secondary Cisco Unified CallManager IP address following the primary Cisco Unified CallManager IP address.
D、There must be a second JTAPI user configured with an alternate range of CTI ports.
小学班主任必须以()为根本指导思想,使小学生在德、智、体、美、劳等方面全面发展,为更进一步的学习和提高全民族的素质打下基础。
A、教育目的
B、教育方针
C、教育政策
D、教育法规