航海英語(yǔ)磁羅經(jīng)與陀螺羅經(jīng)的使用單項(xiàng)選擇題每日一練(2019.01.06)

來(lái)源：考試資料網(wǎng)

1 Quadrantal error in a gyrocompass has its GREATEST effect（）.

2 The greatest directive force is exerted on the magnetic compass when the（）.

3 The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.

4 The magnetic compass operates on the principle that（）.

5 The variation for most given areas undergoes（）change，the amount of which is also noted on charts.