单项选择题
The（）(非包装货) is loaded and discharged by belt conveyer.
A. non-packed cargo B. packed cargo C. cased cargo D. inboard cargo
单项选择题 This is a（）（折叠）type hatch cover.
单项选择题 Sailors also keep （）（舷梯）watch.
单项选择题 Don’t （）(系牢) the guy here.
