单项选择题
A single vessel being towed alongside shall exhibit（）.
A.one all-round white light B.sidelights and a stern light C.only the outboard sidelight and a stern light D.a masthead light，sidelights，and a stern light
单项选择题 A single line of position combined with a dead-reckoning position results in a(n)（）.
单项选择题 A single barometric pressure reading of 28.60 indicates（）.
单项选择题 A signal indicating zone time is preceded with the letter（）.
