单项选择题
A.Advection B.Radiation fog C.frontal fog D.Steam fog
Normally the mariners care more about the（）of tide.A.sp...
单项选择题Normally the mariners care more about the（）of tide.
A.speed B.height C.direction D.course
The International Association of Lighthouse authorities...
单项选择题The International Association of Lighthouse authorities (IALA) buoyage system “A” uses some types of marks to distinguish safe navigation? Which type(s) does(do) not belong to the system?（）
A.lateral marks and cardinal marks B.safe water marks C.isolated danger marks and special marks D.dangerous water marks
Which refers to the living space for seafarers?（）A.Poop...
单项选择题Which refers to the living space for seafarers?（）
A.Poop B.Store room C.Accommodation D.Saloon
