题目内容
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Loran-C uses the multiple pulse system because ______．
A.Less signal energy is necessary for receiver operation
B.More signal energy is available at the receiver
C.It significantly increases the peak power
D.It increases the signal capacity
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更多“Loran-C uses the multiple puls…”相关的问题
Loran-C is which type of system ________．
A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
Loran-C is which type of navigation system ________．
A.Hyperbolic，long-range navigation system
B.Short-range electronic
C.Long-range，high frequency navigation system
D.Long-range，with a frequency of 1950 kHz
A.Focus line
B.Base line
C.Side line
D.Center line
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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