航海英語天文航海單項(xiàng)選擇題每日一練(2019.01.23)

來源：考試資料網(wǎng)

1 A sidereal day is approximately how much shorter than a solar day?（）

2 As observed from the Earth，the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as（）.

3 A first magnitude star is（）.

4 On mid-ocean waters，the height of a wind-generated wave is not affected by the（）.

5 Apparent altitude is sextant altitude corrected for（）.