单项选择题
As a ship moves through the water，it causes a wake，which is also moving forward relative to the sea. In addition to a fore and aft motion，this wake also has a(n)（）.
A.downward and inward flow B.downward and outward flow C.upward and inward flow D.upward and outward flow
单项选择题 Angular motion about the vertical axis of a vessel is called（）.
单项选择题 Angular motion about the longitudinal axis of a vessel is known as（）.
单项选择题 All of the following can be determined by use of a stabilogauge EXCEPT（）.
