单选题The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.AAn atomic time standardBDaylight Savings TimeCEastern Standard TimeDGreenwich Mean Time
单选题
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
A
An atomic time standard
B
Daylight Savings Time
C
Eastern Standard Time
D
Greenwich Mean Time
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