当采用存储单元与I/O端口统一编址时,CPU的数据传送指令()。 可以访问I/O端口和存储单元。 只能访问I/O端口。 既不能访问存储单元又不能访问I/O端口。 只能访问存储单元。
《动车组列车服务质量规范》灾害多发季节增备易于保质的食品、饮用水和应急药品,单独存放。
液体曲
铁路站线包括()等几种类型。 到发线、调度线、货物线、专用线。 到发线、调度线、工业企业线、正线。 牵出线、到发线、调车线、段管线。 到发线、调车线、货物线、牵出线。
Before inserting a new switch in the network, the network administrator checks that the VTP domain name is correct, the VTP mode is set to server, and revision is lower than the switches in the network. The administrator then configures interfaces and trunks, erases existing VLANs, and connects the switch to the network. Following that procedure, there is no connectivity in the network. What is a possible cause of this problem?() Because the configuration revision of the new switches is lower than the rest of the network, it can change the VLAN database of the other switches.。 As a VTP server, the new switch deleted all VLANs of the network.。 Erasing VLANs increases the VTP configuration revision.。 Since the configuration revision of the network is higher than the new switch, the VLAN database was automatically synchronized.。
磁选机的磁系宽度是指磁系沿圆筒轴向方向上的()。