单选题In using Loran-C，skywave reception gives greater range but is（）.Aonly accurate during daylight hoursBmuch less accurateConly accurate at twilightDmore accurate than using ground waves
单选题
In using Loran-C，skywave reception gives greater range but is（）.
A
only accurate during daylight hours
B
much less accurate
C
only accurate at twilight
D
more accurate than using ground waves
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