33. 下列何者為造成船舶磁羅經“Deviation” 誤差的主要原因?
(A)the sunlight
(B)the earth
(C)ship wooden material
(D)cargo and ship body
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統計: A(0), B(0), C(0), D(2), E(0) #4054716
統計: A(0), B(0), C(0), D(2), E(0) #4054716