单项选择题
What（）your registry port, over.
A.are B.is C.were D.was
单项选择题 After transferring a weight forward on a vessel，the draft at the center of flotation will（）.
单项选择题 In order to ensure that a RACON signal is displayed on the radar，you should（）.
单项选择题 In a crossing situation，the stand-on vessel should normally（）.
