单项选择题
The height from waterline to the bottom of ship is called draft.()
A.水线到船舶主甲板的高度称为干舷。 B.水线到船舶底部的高度称为干舷。 C.水线到船舶底部的高度称为吃水。 D.水线到船舶主甲板的高度称为吃水。
单项选择题 Sailors must keep lookout in poor visibility.()
单项选择题 Cement wash is used for fresh water tanks and double bottom tanks. ()
单项选择题 All the cargo wires must be adjusted well.()