31. 承上題,大圈初航向為多少?
(A) Cn 048.3°
(B) Cn 056.5°
(C) Cn 062.2°
(D) Cn 066.7°
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統計: A(22), B(314), C(49), D(23), E(0) #1410414
統計: A(22), B(314), C(49), D(23), E(0) #1410414