問題詳情
13.A line connecting points of equal magnetic variation calls ___________ .
(A)magnetic latitude
(B)magnetic declination
(C)deviation
(D)isogonic
(A)magnetic latitude
(B)magnetic declination
(C)deviation
(D)isogonic
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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