单项选择题
This is （）(甲板货).
A. deck cargo B. wet cargo C. light cargo D. heavy cargo
单项选择题 Persons who load and discharge ships are called （）(装卸工人).
单项选择题 There is no power for the （）(起货机).
单项选择题 Containers are loaded and discharged by （）(龙门吊).
