单项选择题
Horton Point Light（）.
A.is 14 feet above sea level B.has a fixed green light C.is shown from a white square tower D.is synchronized with a radio beacon
单项选择题 Free communication will adversely affect transverse stability only when the flooded space is （）.
单项选择题 An immersion suit should be equipped with a/an（）.
单项选择题 An immersion suit must be equipped with a(n)（）.
