一对标准直齿锥齿轮，两齿轮的齿根高（）。
参考答案：相等
A vessel continually lists to one side and has a normal rolling period. Which statement is true?（）.
A.The vessel has negative GM
B.The center of gravity is on the centerline
C.The list can be corrected by reducing KM
D.The vessel has asymmetrical weight distribution
人可以创造条件去改变规律。（）
