（1.5 分）
Coast radio stations generally provide weather information for ships ___. I. in code, II. In a certain language, III. in written form
A.I B.I + II C.II D.I + II + III正确答案A
（1.5 分）
Coast radio stations generally provide weather information for ships ___. I. in code, II. In a certain language, III. in written form
A.I B.I + II C.II D.I + II + III正确答案A
