Which set of commands is recommended to prevent the use of a hub in the access layer?（） ["switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1","switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1","switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1","switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1"]
放大电路交流负载线的斜率与放大电路的（）无关。 ["总负载电阻","负载电阻","集电极电阻","输入电阻"]
试述地下连续墙的技术要点。
Refer to the exhibit.Which two statements are true of the interfaces on switch1？（） ["A hub is connected directly to FastEthernet0\/5","FastEthernet0\/1 is configured as a trunk link.","FastEthernet0\/5 has statically assigned mac address","Interface FastEthernet0\/2 has been disable.","Multiple devices are connected directly to FastEthernet0\/1.","FastEthernet0\/1 is connected to a host with multiple network interface cards."]
锚固段强度大于15MPa并达到设计强度等级的（）后方可进行张拉 ["75%","70%","80%","85%"]
重庆以前是粗放式的发展模式，现在进入了一个（）发展的模式。
