【单选题】A technician installed a new video card on a motherboard which has onboard video. When the monitor was plugged into the new card and the power was turned on, a no signal message appeared on the monito...
A.
In the BIOS, the onboard video adapter must be disabled.
B.
The video resolution is set too high.
C.
The LCD panel is defective.
D.
The drivers for the new video card must be installed before installing the card.
【单选题】When can routine communications be resumed when radio silence has been imposed?()
A.
After determining that the frequency or channel appears to be no longer in use
B.
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.
Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.
If,in the Master's opinion,communications on that frequency will interfere with emergency communications