单项选择题
A MARK OR POSITION AT WHICH A VESSEL IS REQUIRED TO REPORT TO ESTABLISH ITS POSITION defines（）.
A.VTS point B.Way point C.Reference point D.Establishment point
单项选择题 （）will the discharging operations take?
单项选择题 （）will reduce the visibility.
单项选择题 （）view of the fact，I wish to submit this report.
