航海英語天文航海單項(xiàng)選擇題每日一練(2019.01.24)

來源：考試資料網(wǎng)

1 A parallax correction is NOT applied to observations of the（）.

2 Right ascension is primarily used by the navigator for（）.

3 A body can only be observed at lower transit when（）.

4 Elongation becomes zero at（）.

5 A large group of stars revolving around a center is known as a（）.