The weather, position of the sun, and solar activity can affect which type of communication device?
Select one or more:
a. VHF radios.
b. HF radios.
c. Telephones.
d. Mobile telephones (cell phones).
Question 7
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Question text
Post-Traumatic Stress Disorder (PTSD) always occurs immediately after an exposure to a traumatic event or critical incident.
Select one:
True
False