煤气回收时炉口微差压应尽量控制在()
A. 0~20Pa
B. 50~100Pa
C. 50~100Pa
下列()情况,值班驾驶员应立即通知机舱备车,并报告船长。
A. 能见度不良或恶劣天气时
B. 进入狭水道或邻近来往船舶频繁的海区时
C. 抵达目的港或有其它紧急情况时
D. 以上均是
电力电容器组火灾时,应立即(),并投入放电电阻或放电线圈。
A. 断开电源
B. 用水扑救
C. 用泡沫灭火器扑救
D. 用水灭火
Which statement is correct about the use of the virtual interface on a WLC ?()
A. Used to relay DHCP messages
B. Used to communicate with LAPs
C. Used to bring up LWAPP tunnels
D. Used to extend into the wireless client VLAN