单项选择题
In working out a local apparent noon sight for your latitude，you subtract the Ho from 90°. The 90°represents the angular distance from（）.
A.the equator to the elevated pole B.your horizon to your zenith C.your zenith to the elevated pole D.the geographical position of the Sun to the elevated pole
单项选择题 In the navigational triangle，the angle at the elevated pole is the（）.
单项选择题 In the horizon system of coordinates what is equivalent to latitude on the Earth?（）.
单项选择题 In the horizon system of coordinates what is equivalent to the equator on the Earth?（）.
