25. The horizontal B and C components of ______ magnetism cause various
deviations of the magnetic compass when the ship swings in heading on an even keel.
Plotting such deviations against compass heading yields the sine and cosine curves.
(A) induced
(B) temporary
(C) permanent
(D) transient
詳解 (共 1 筆)
未解鎖
本題有B C自差C沒有感應磁性自差 故不...
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