問題詳情
18. How often magnetic compass should be calibrated to determine its deviation?
(A) Annually.
(B) Biannually.
(C) Biennially.
(D) Quarterly.
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
用户評論
【Pei-Ru Huang】評論
magnetic compass 磁羅經calibrate 校準determine 決定測定deviation 偏差biannually 半年一次biennially 兩年一次quarterly 每季