国产抽油杆有两种,一种是()抽油杆,另一种是合金钢抽油杆。
A. 铬钼钢
B. 碳钢
C. 不锈钢
D. 镍钼钢
查看答案
按GB7588-2003《电梯制造与安装安全规范》附录M规定,在V形绳槽的当量摩擦系的计算公式中,下部切口角β的数值最大不应超过()
A. 108°
B. 106°
C. 110°
You deploy a mobile messaging solution by using front-end and back-end servers that run Microsoft Exchange Server 2003 Service Pack 2. Certificates are installed on all Microsoft Windows Mobilebased devices. You need to allow devices that run Microsoft Windows Mobile 5.0 to perform certificate-based authentication for Microsoft Exchange ActiveSync. What should you do?()
A. Configure the front-end server for Kerberos Constrained Delegation (KCD).
B. Configure a Routing Group Connector between the front-end and back-end servers.
Configure the Windows Mobilebased devices with a Point-to-Point Protocol (PPTP) connection.
D. Configure the Windows Mobilebased devices to use Extensible Authentication Protocol (EAP) and either a smart card or a certificate.
关于PTU自动工作,以下说法正确的是()
A. 飞机在空中,B系统EDP低压
B. 飞机在空中,B系统EDP低压,襟翼小于5个单位,但未收上
C. 飞机在空中,B系统EDP低压,襟翼小于15个单位,但未收上
D. 飞机在空中,B系统EDP低压,襟翼小于5个单位,但未收上,起落架手柄在UP位
企业运用广告策略,推动市场营销,可供选择的有()
A. 产品线扩展
B. 品牌延伸
C. 品牌重新定位
D. B和C