单项选择题
A.Gemini B.Auriga C.Libra D.Crab
Because the actual center of some planets may differ fr...
单项选择题Because the actual center of some planets may differ from the observed center，the navigator applies a correction known as the（）.
A.phase correction B.refraction correction C.semidiameter correction D.augmentation correction
As observed from the Earth，the angle between lines from...
单项选择题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（）.
A.elongation B.conjunction C.opposition D.quadrature
Apparent altitude is sextant altitude corrected for（）.A...
单项选择题Apparent altitude is sextant altitude corrected for（）.
A.parallax and personal error B.inaccuracies in the reading and reference level C.visibility and magnitude D.All of the above are correct
