单项选择题
General radio communications in the global system may（）ship’s safety.
A.be responsible for B.have an impact on C.command D.give a guidance to
单项选择题 The distress alert should（）the ship in distress.
单项选择题 Vessel in distress（）indicate their position by any method.
单项选择题 What following is not among the functions of SOLAS ships?（）
