航海英語航海學(xué)基本知識單項選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）

2 A line on the Earth parallel to the equator is a（）.

3 A light having characteristics which include color variations is defined as（）.

4 An orange and white buoy marking a danger area will have what symbol on it?（）

5 Fishing stake，the position of which frequently（），exist in the area covered by this chart.