航海英語天文航海單項選擇題每日一練(2019.01.09)

來源：考試資料網(wǎng)

1 Elongation becomes zero at（）.

2 In the navigational triangle，the angle at the elevated pole is the（）.

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

點擊查看答案

4 The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used（）.

點擊查看答案

5 Planetary aberration is due，in part，to（）.

點擊查看答案