单项选择题
A.tree or log awash in a nearly vertical position B.crew member who refuses to work C.upstream end of a land wall D.buoy that is adrift
A barometer showing falling pressure indicates the appr...
单项选择题A barometer showing falling pressure indicates the approach of a（）.
A.high pressure system B.low pressure system C.high dew point D.low dew point
（）the canal transit，the radar was operating.A.AtB.InC.D...
单项选择题（）the canal transit，the radar was operating.
A.At B.In C.During D.With
（）should be used during the poor visibility if the rada...
单项选择题（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
A.Gain Control B.Brilliant Control C.Anti-clutter Sea Control D.Sweep Intercept
