单项选择题
A semidiameter correction is applied to observations of（）.
A.Mars B.the Moon C.Jupiter D.All of the above
单项选择题 A phase correction may be applicable to correct the sextant altitude correction of（）.
单项选择题 A phase correction is applied to observations of（）.
单项选择题 A parallax correction is NOT applied to observations of the（）.
