单项选择题
Please close all the hatches.（）
A.请把所有的舱关闭 B.关舱 C.请打开舱 D.请把所有的舱打开
单项选择题 Those lashing tools must be tightened again before and after bad weather.（）
单项选择题 Clamps have been used up， and we also need plenty of lashing wires.（）
单项选择题 Liquid bulk cargo is loaded and discharged by pumps.（）
