上停料，变料时要做到（）、料尾整齐。
受弯构件正截面承载力计算基本公式的建立是依据哪种破坏形态建立的（）。 筋破坏。 适筋破坏。 超筋破坏。 限破坏。
利用直方图分析质量数据，质量控制标准常以（）为控制界限。 A.μ±σ 。 B.μ±2σ 。 C.μ±3σ 。 D.μ±4σ。
在利用直方图对质量数据进行分析时，出现双峰型直方图的原因是（）。 A.分组太细 。 B.人为剔除了不合格品 。 C.分组太粗 。 D.数据来自不同的工序条件。
A network administrator wants to ensure that only the server can connect to port Fa0/1 on a Catalyst switch. The server is plugged into the switch Fa0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of the server is allowed by switch port Fa0/1 (Choose two.)（）。 Configure port Fa0/1 to accept connections only from the static IP address of the server.。 Employ a proprietary connector type on Fa0/1 that is incompatible with other host connectors.。 Configure the MAC address of the server as a static entry associated with port Fa0/1.。 Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address.。 Configure port security on Fa0/1 to reject traffic with a source MAC address other than that of the server.。 Configure an access list on the switch to deny server traffic from entering any port other than Fa0/1.。
在一个共享的双绞线的网络上的接口上产生了冲突检测和载波侦听.通过这个描述，关于这个网络接口你知道了什么？（）
