【单选题】
A single vessel being towed alongside shall exhibit（）.
A single vessel being towed alongside shall exhibit（）.
A、 one all-round white light
B、 sidelights and a sternlight
C、 only the outboard sidelight and a sternlight
D、 a masthead light，sidelights，and a sternlight
题目答案
答案解析
略