单项选择题
Between 1830 hrs and 1850 hrs this day，strong gusty winds（）by my vessel，in consequence of which the vessel’s four mooring lines were broken.
A.was experienced B.were experienced C.has experienced D.have experienced
单项选择题 An obstruction on a helodeck is any object that might present a hazard to the（）.
单项选择题 An inert gas system on a tanker should be used to（）.
单项选择题 An inert gas system installed on a tanker is designed to（）.
