单项选择题
Perihelion is the point where the Sun（）.
A.is nearest to the Earth B.is farthest from the Earth C.is on the opposite side of the Earth from the Moon D.and Moon and Earth are in line
单项选择题 Other than the Sun and Moon，the brightest object in the sky is（）.
单项选择题 Opposition occurs when（）.
单项选择题 On mid-ocean waters，the height of a wind-generated wave is not affected by the（）.
