单项选择题
A.full confirmation B.precise appreciation C.immediate assessment D.timely recognition
Radar makes the most accurate determination of the（）.A....
单项选择题Radar makes the most accurate determination of the（）.
A.direction of a target B.distance to a target C.size of a target D.shape of a target
Radar is not only to obtain（），but also to measure their...
单项选择题Radar is not only to obtain（），but also to measure their distance away from you.
A.brightness of objects B.color of targets C.shape of targets D.bearing of objects
Most GPS receivers use the doppler shift of the carrier...
单项选择题Most GPS receivers use the doppler shift of the carrier phase to compute（）.
A.Latitude B.Longitude C.Speed D.Time
