单项选择题
The （）(袋装货) can’t be unloaded by hooks.
A. bagged cargo B. drummed cargo C. cased cargo D. deck cargo
单项选择题 Please adjust the derrick （）(向下).
单项选择题 The （）(箱装货) should be handled by cargo tray.
单项选择题 The （）(侧稳索) has gone wrong.
