单项选择题
A.half that of the moon B.equal to more than half that of the moon C.equal to that of the moon D.twice that of the moon
A.the sun B.the depth of the ocean C.the moon D.the winds
A.is not as important as that of the wind B.is less than half that of the sun C.is the primary cause of the alternate rise and fall of the surface of the seas D.does not influence the rise and fall of the surface of the seas