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单选题
When carrying out a parallel track search pattern，the course of the search units should normally be which of the following（）.
A
In the same direction as the anticipated drift
B
In the opposite direction of the anticipated drift
C
Perpendicular to the line of anticipated drift
D
Downwind
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When carrying out a parallel track search pattern，the course of the search units should normally be which of the following ________．A.In the same direction as the anticipated driftB.In the opposite direction of the anticipated driftC.Perpendicular to the line of anticipated driftD.Downwind
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