现代教学手段的多媒体化趋势主要表现在（）的应用和多媒体优化组合所形成的（）的应用。
《安全生产法》对从业人员在作业过程中的有关安全义务是如何规定的？
Refer to the exhibit. VTP has been enabled on the trunk links between all switches within the TEST domain. An administrator has recently enabled VTP pruning. Port 1 on Switch 1 and port 2 on Switch 4 are assigned to VLAN 2. A broadcast is sent from the host connected to Switch 1. Where will the broadcast propagate?（） ["Every switch in the network receives the broadcast and will forward it out all ports.","Every switch in the network receives the broadcast，but only Switch 4 will forward it out port 2.","Switches 1，2，and 4 will receive the broadcast，but only Switch 4 will forward it out port 2.","Only Switch 4 will receive the broadcast and will forward it out port 2."]
如果只有一个备选方案，用内部报酬率法选择投资项目，当计算的内部报酬率（）必要报酬率时，就采纳。 ["大于","大于等于","小于","小于等于"]
When configuring vPC-HM CDP with multiple links to the same switch， are port-channels required？（） [" Each link between the upstream switch and the VEM is an individual subgroup."," Connections that go to the same upstream switch must be configured with the command channel-group mode active."," Connections that go to the same upstream switch must be configured with the command channel-group mode passive."," With vPC-HM CDP， the user can pin traffic from a specific VM to a specific uplink."," Connections that go to the same upstream switch must be configured with the command channel-group mode on.<\/number><\/number><\/number>"]
SBR工艺的特点是什么？
