问题
单项选择题
To obtain accuracy in fixing by DF，（）and three stations should be used.
A.Parallel bearings
B.Long-range bearings
C.Short-range bearings
D.Cross bearings
答案
参考答案：D
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To obtain accuracy in fixing by DF，（）and three stations should be used.
A.Parallel bearings
B.Long-range bearings
C.Short-range bearings
D.Cross bearings
参考答案：D