单项选择题
A.identity B.time of origin C.reply D.procedure code
A message by flashing light consists of the call，the id...
单项选择题A message by flashing light consists of the call，the identity，the ending，and the（）.
A.reply B.text C.time D.answer
“How do you read?” “I read you with signal strength one...
单项选择题“How do you read?” “I read you with signal strength one”（）.
A.poor B.bad C.fair D.good
LAND-BASED AUTHORITY CONDUCTING AND CO-ORDINATING SEARC...
单项选择题LAND-BASED AUTHORITY CONDUCTING AND CO-ORDINATING SEARCH AND RESCUE OPERATIONS IN A DESIGNATED AREA defines（）.
A.RCC B.OSC C.CSS D.GPS
