单选题集装箱是由龙门吊装卸。（）AContainers are loaded and discharged by gantry cranes.BCases are loaded and discharged by gantry cranes.CCases are loaded and discharged by heavy derricks.DContainers are loaded and discharged by heavy derricks.
单选题
集装箱是由龙门吊装卸。（）
A
Containers are loaded and discharged by gantry cranes.
B
Cases are loaded and discharged by gantry cranes.
C
Cases are loaded and discharged by heavy derricks.
D
Containers are loaded and discharged by heavy derricks.
参考解析
解析：
暂无解析
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