单选题利用国际海事卫星系统进行紧急信息时不必发送引语的原因是()A国际海事卫星系统是数字化通信B通过选择紧急通信优先等级操作员已经获得了进入国际海事卫星系统的优先权C国际海事卫星系统作用距离远D三个选项都对
单选题
利用国际海事卫星系统进行紧急信息时不必发送引语的原因是()
A
国际海事卫星系统是数字化通信
B
通过选择紧急通信优先等级操作员已经获得了进入国际海事卫星系统的优先权
C
国际海事卫星系统作用距离远
D
三个选项都对
参考解析
解析:
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