磁铁矿的损失包括（）。 技术损失。 技术损失和管理损失。 管理损失料。 运输损失。
班集体建设的基本方法有（ ）、（ ）、（ ）、（ ）。
Refer to the exhibit. Catalyst R is the root bridge for both VLAN 1 and VLAN 2.What is the easiest way to load-share traffic across both trunks and maintain redundancy in case a link fails，without using any type of EtherChannel link-bundling？（） Increase the root bridge priority （increasing the numerical priority number） for VLAN 2 on Catalyst D so that port D2 becomes the root port on Catalyst D for VLAN 2.。 Decrease the port priority on R2 for VLAN 2 on Catalyst R so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1.。 Decrease the path cost on R2 on Catalyst R for VLAN 2 so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1.。 Increase the root bridge priority （decreasing the numerical priority number） for VLAN 2 on Catalyst R so that R2 becomes the root port on Catalyst D for VLAN 2.。
Which statement is true about TCN propagation？（） The originator of the TCN immediately floods this information through the network.。 The TCN propagation is a two step process.。 A TCN is generated and sent to the root bridge.。 The root bridge must flood this information throughout the network.。
大于（）的叉车，为了操纵方便，减轻驾驶员疲劳，多采用全液压转向。 1吨。 两吨。 1.5吨。 2.5吨。
筒式磁选机按照其槽体结构分为（）。
