航海英語天文航海單項選擇題每日一練(2019.01.08)

來源：考試資料網(wǎng)

1 During one synodic rotation，a body makes one complete turn relative to the（）.

2 Sidereal time is NOT used（）.

3 In order for a star to be used for a sight at lower transit，the star must（）.

4 In working out a local apparent noon sight for your latitude，you subtract the Ho from 90°. The 90°represents the angular distance from（）.

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